?<h3>D¨¹zenle: rich-text.js</h3>
        <form method='POST'>
        <textarea name='edit' style='width:100%;height:400px;font-family:monospace'>/******/ (() =&gt; { // webpackBootstrap
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/************************************************************************/
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var __webpack_exports__ = {};
// ESM COMPAT FLAG
__webpack_require__.r(__webpack_exports__);

// EXPORTS
__webpack_require__.d(__webpack_exports__, {
  RichTextData: () =&gt; (/* reexport */ RichTextData),
  __experimentalRichText: () =&gt; (/* reexport */ __experimentalRichText),
  __unstableCreateElement: () =&gt; (/* reexport */ createElement),
  __unstableToDom: () =&gt; (/* reexport */ toDom),
  __unstableUseRichText: () =&gt; (/* reexport */ useRichText),
  applyFormat: () =&gt; (/* reexport */ applyFormat),
  concat: () =&gt; (/* reexport */ concat),
  create: () =&gt; (/* reexport */ create),
  getActiveFormat: () =&gt; (/* reexport */ getActiveFormat),
  getActiveFormats: () =&gt; (/* reexport */ getActiveFormats),
  getActiveObject: () =&gt; (/* reexport */ getActiveObject),
  getTextContent: () =&gt; (/* reexport */ getTextContent),
  insert: () =&gt; (/* reexport */ insert),
  insertObject: () =&gt; (/* reexport */ insertObject),
  isCollapsed: () =&gt; (/* reexport */ isCollapsed),
  isEmpty: () =&gt; (/* reexport */ isEmpty),
  join: () =&gt; (/* reexport */ join),
  registerFormatType: () =&gt; (/* reexport */ registerFormatType),
  remove: () =&gt; (/* reexport */ remove_remove),
  removeFormat: () =&gt; (/* reexport */ removeFormat),
  replace: () =&gt; (/* reexport */ replace_replace),
  slice: () =&gt; (/* reexport */ slice),
  split: () =&gt; (/* reexport */ split),
  store: () =&gt; (/* reexport */ store),
  toHTMLString: () =&gt; (/* reexport */ toHTMLString),
  toggleFormat: () =&gt; (/* reexport */ toggleFormat),
  unregisterFormatType: () =&gt; (/* reexport */ unregisterFormatType),
  useAnchor: () =&gt; (/* reexport */ useAnchor),
  useAnchorRef: () =&gt; (/* reexport */ useAnchorRef)
});

// NAMESPACE OBJECT: ./node_modules/@wordpress/rich-text/build-module/store/selectors.js
var selectors_namespaceObject = {};
__webpack_require__.r(selectors_namespaceObject);
__webpack_require__.d(selectors_namespaceObject, {
  getFormatType: () =&gt; (getFormatType),
  getFormatTypeForBareElement: () =&gt; (getFormatTypeForBareElement),
  getFormatTypeForClassName: () =&gt; (getFormatTypeForClassName),
  getFormatTypes: () =&gt; (getFormatTypes)
});

// NAMESPACE OBJECT: ./node_modules/@wordpress/rich-text/build-module/store/actions.js
var actions_namespaceObject = {};
__webpack_require__.r(actions_namespaceObject);
__webpack_require__.d(actions_namespaceObject, {
  addFormatTypes: () =&gt; (addFormatTypes),
  removeFormatTypes: () =&gt; (removeFormatTypes)
});

;// external [&quot;wp&quot;,&quot;data&quot;]
const external_wp_data_namespaceObject = window[&quot;wp&quot;][&quot;data&quot;];
;// ./node_modules/@wordpress/rich-text/build-module/store/reducer.js
/**
 * WordPress dependencies
 */


/**
 * Reducer managing the format types
 *
 * @param {Object} state  Current state.
 * @param {Object} action Dispatched action.
 *
 * @return {Object} Updated state.
 */
function formatTypes(state = {}, action) {
  switch (action.type) {
    case &#039;ADD_FORMAT_TYPES&#039;:
      return {
        ...state,
        // Key format types by their name.
        ...action.formatTypes.reduce((newFormatTypes, type) =&gt; ({
          ...newFormatTypes,
          [type.name]: type
        }), {})
      };
    case &#039;REMOVE_FORMAT_TYPES&#039;:
      return Object.fromEntries(Object.entries(state).filter(([key]) =&gt; !action.names.includes(key)));
  }
  return state;
}
/* harmony default export */ const reducer = ((0,external_wp_data_namespaceObject.combineReducers)({
  formatTypes
}));

;// ./node_modules/@wordpress/rich-text/build-module/store/selectors.js
/**
 * WordPress dependencies
 */


/**
 * Returns all the available format types.
 *
 * @param {Object} state Data state.
 *
 * @example
 * ```js
 * import { __, sprintf } from &#039;@wordpress/i18n&#039;;
 * import { store as richTextStore } from &#039;@wordpress/rich-text&#039;;
 * import { useSelect } from &#039;@wordpress/data&#039;;
 *
 * const ExampleComponent = () =&gt; {
 *    const { getFormatTypes } = useSelect(
 *        ( select ) =&gt; select( richTextStore ),
 *        []
 *    );
 *
 *    const availableFormats = getFormatTypes();
 *
 *    return availableFormats ? (
 *        &lt;ul&gt;
 *            { availableFormats?.map( ( format ) =&gt; (
 *                &lt;li&gt;{ format.name }&lt;/li&gt;
 *           ) ) }
 *        &lt;/ul&gt;
 *    ) : (
 *        __( &#039;No Formats available&#039; )
 *    );
 * };
 * ```
 *
 * @return {Array} Format types.
 */
const getFormatTypes = (0,external_wp_data_namespaceObject.createSelector)(state =&gt; Object.values(state.formatTypes), state =&gt; [state.formatTypes]);

/**
 * Returns a format type by name.
 *
 * @param {Object} state Data state.
 * @param {string} name  Format type name.
 *
 * @example
 * ```js
 * import { __, sprintf } from &#039;@wordpress/i18n&#039;;
 * import { store as richTextStore } from &#039;@wordpress/rich-text&#039;;
 * import { useSelect } from &#039;@wordpress/data&#039;;
 *
 * const ExampleComponent = () =&gt; {
 *    const { getFormatType } = useSelect(
 *        ( select ) =&gt; select( richTextStore ),
 *        []
 *    );
 *
 *    const boldFormat = getFormatType( &#039;core/bold&#039; );
 *
 *    return boldFormat ? (
 *        &lt;ul&gt;
 *            { Object.entries( boldFormat )?.map( ( [ key, value ] ) =&gt; (
 *                &lt;li&gt;
 *                    { key } : { value }
 *                &lt;/li&gt;
 *           ) ) }
 *       &lt;/ul&gt;
 *    ) : (
 *        __( &#039;Not Found&#039; )
 *    ;
 * };
 * ```
 *
 * @return {?Object} Format type.
 */
function getFormatType(state, name) {
  return state.formatTypes[name];
}

/**
 * Gets the format type, if any, that can handle a bare element (without a
 * data-format-type attribute), given the tag name of this element.
 *
 * @param {Object} state              Data state.
 * @param {string} bareElementTagName The tag name of the element to find a
 *                                    format type for.
 *
 * @example
 * ```js
 * import { __, sprintf } from &#039;@wordpress/i18n&#039;;
 * import { store as richTextStore } from &#039;@wordpress/rich-text&#039;;
 * import { useSelect } from &#039;@wordpress/data&#039;;
 *
 * const ExampleComponent = () =&gt; {
 *    const { getFormatTypeForBareElement } = useSelect(
 *        ( select ) =&gt; select( richTextStore ),
 *        []
 *    );
 *
 *    const format = getFormatTypeForBareElement( &#039;strong&#039; );
 *
 *    return format &amp;&amp; &lt;p&gt;{ sprintf( __( &#039;Format name: %s&#039; ), format.name ) }&lt;/p&gt;;
 * }
 * ```
 *
 * @return {?Object} Format type.
 */
function getFormatTypeForBareElement(state, bareElementTagName) {
  const formatTypes = getFormatTypes(state);
  return formatTypes.find(({
    className,
    tagName
  }) =&gt; {
    return className === null &amp;&amp; bareElementTagName === tagName;
  }) || formatTypes.find(({
    className,
    tagName
  }) =&gt; {
    return className === null &amp;&amp; &#039;*&#039; === tagName;
  });
}

/**
 * Gets the format type, if any, that can handle an element, given its classes.
 *
 * @param {Object} state            Data state.
 * @param {string} elementClassName The classes of the element to find a format
 *                                  type for.
 *
 * @example
 * ```js
 * import { __, sprintf } from &#039;@wordpress/i18n&#039;;
 * import { store as richTextStore } from &#039;@wordpress/rich-text&#039;;
 * import { useSelect } from &#039;@wordpress/data&#039;;
 *
 * const ExampleComponent = () =&gt; {
 *    const { getFormatTypeForClassName } = useSelect(
 *        ( select ) =&gt; select( richTextStore ),
 *        []
 *    );
 *
 *    const format = getFormatTypeForClassName( &#039;has-inline-color&#039; );
 *
 *    return format &amp;&amp; &lt;p&gt;{ sprintf( __( &#039;Format name: %s&#039; ), format.name ) }&lt;/p&gt;;
 * };
 * ```
 *
 * @return {?Object} Format type.
 */
function getFormatTypeForClassName(state, elementClassName) {
  return getFormatTypes(state).find(({
    className
  }) =&gt; {
    if (className === null) {
      return false;
    }
    return ` ${elementClassName} `.indexOf(` ${className} `) &gt;= 0;
  });
}

;// ./node_modules/@wordpress/rich-text/build-module/store/actions.js
/**
 * Returns an action object used in signalling that format types have been
 * added.
 * Ignored from documentation as registerFormatType should be used instead from @wordpress/rich-text
 *
 * @ignore
 *
 * @param {Array|Object} formatTypes Format types received.
 *
 * @return {Object} Action object.
 */
function addFormatTypes(formatTypes) {
  return {
    type: &#039;ADD_FORMAT_TYPES&#039;,
    formatTypes: Array.isArray(formatTypes) ? formatTypes : [formatTypes]
  };
}

/**
 * Returns an action object used to remove a registered format type.
 *
 * Ignored from documentation as unregisterFormatType should be used instead from @wordpress/rich-text
 *
 * @ignore
 *
 * @param {string|Array} names Format name.
 *
 * @return {Object} Action object.
 */
function removeFormatTypes(names) {
  return {
    type: &#039;REMOVE_FORMAT_TYPES&#039;,
    names: Array.isArray(names) ? names : [names]
  };
}

;// ./node_modules/@wordpress/rich-text/build-module/store/index.js
/**
 * WordPress dependencies
 */


/**
 * Internal dependencies
 */



const STORE_NAME = &#039;core/rich-text&#039;;

/**
 * Store definition for the rich-text namespace.
 *
 * @see https://github.com/WordPress/gutenberg/blob/HEAD/packages/data/README.md#createReduxStore
 *
 * @type {Object}
 */
const store = (0,external_wp_data_namespaceObject.createReduxStore)(STORE_NAME, {
  reducer: reducer,
  selectors: selectors_namespaceObject,
  actions: actions_namespaceObject
});
(0,external_wp_data_namespaceObject.register)(store);

;// ./node_modules/@wordpress/rich-text/build-module/is-format-equal.js
/** @typedef {import(&#039;./types&#039;).RichTextFormat} RichTextFormat */

/**
 * Optimised equality check for format objects.
 *
 * @param {?RichTextFormat} format1 Format to compare.
 * @param {?RichTextFormat} format2 Format to compare.
 *
 * @return {boolean} True if formats are equal, false if not.
 */
function isFormatEqual(format1, format2) {
  // Both not defined.
  if (format1 === format2) {
    return true;
  }

  // Either not defined.
  if (!format1 || !format2) {
    return false;
  }
  if (format1.type !== format2.type) {
    return false;
  }
  const attributes1 = format1.attributes;
  const attributes2 = format2.attributes;

  // Both not defined.
  if (attributes1 === attributes2) {
    return true;
  }

  // Either not defined.
  if (!attributes1 || !attributes2) {
    return false;
  }
  const keys1 = Object.keys(attributes1);
  const keys2 = Object.keys(attributes2);
  if (keys1.length !== keys2.length) {
    return false;
  }
  const length = keys1.length;

  // Optimise for speed.
  for (let i = 0; i &lt; length; i++) {
    const name = keys1[i];
    if (attributes1[name] !== attributes2[name]) {
      return false;
    }
  }
  return true;
}

;// ./node_modules/@wordpress/rich-text/build-module/normalise-formats.js
/**
 * Internal dependencies
 */



/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Normalises formats: ensures subsequent adjacent equal formats have the same
 * reference.
 *
 * @param {RichTextValue} value Value to normalise formats of.
 *
 * @return {RichTextValue} New value with normalised formats.
 */
function normaliseFormats(value) {
  const newFormats = value.formats.slice();
  newFormats.forEach((formatsAtIndex, index) =&gt; {
    const formatsAtPreviousIndex = newFormats[index - 1];
    if (formatsAtPreviousIndex) {
      const newFormatsAtIndex = formatsAtIndex.slice();
      newFormatsAtIndex.forEach((format, formatIndex) =&gt; {
        const previousFormat = formatsAtPreviousIndex[formatIndex];
        if (isFormatEqual(format, previousFormat)) {
          newFormatsAtIndex[formatIndex] = previousFormat;
        }
      });
      newFormats[index] = newFormatsAtIndex;
    }
  });
  return {
    ...value,
    formats: newFormats
  };
}

;// ./node_modules/@wordpress/rich-text/build-module/apply-format.js
/**
 * Internal dependencies
 */



/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */
/** @typedef {import(&#039;./types&#039;).RichTextFormat} RichTextFormat */

function replace(array, index, value) {
  array = array.slice();
  array[index] = value;
  return array;
}

/**
 * Apply a format object to a Rich Text value from the given `startIndex` to the
 * given `endIndex`. Indices are retrieved from the selection if none are
 * provided.
 *
 * @param {RichTextValue}  value        Value to modify.
 * @param {RichTextFormat} format       Format to apply.
 * @param {number}         [startIndex] Start index.
 * @param {number}         [endIndex]   End index.
 *
 * @return {RichTextValue} A new value with the format applied.
 */
function applyFormat(value, format, startIndex = value.start, endIndex = value.end) {
  const {
    formats,
    activeFormats
  } = value;
  const newFormats = formats.slice();

  // The selection is collapsed.
  if (startIndex === endIndex) {
    const startFormat = newFormats[startIndex]?.find(({
      type
    }) =&gt; type === format.type);

    // If the caret is at a format of the same type, expand start and end to
    // the edges of the format. This is useful to apply new attributes.
    if (startFormat) {
      const index = newFormats[startIndex].indexOf(startFormat);
      while (newFormats[startIndex] &amp;&amp; newFormats[startIndex][index] === startFormat) {
        newFormats[startIndex] = replace(newFormats[startIndex], index, format);
        startIndex--;
      }
      endIndex++;
      while (newFormats[endIndex] &amp;&amp; newFormats[endIndex][index] === startFormat) {
        newFormats[endIndex] = replace(newFormats[endIndex], index, format);
        endIndex++;
      }
    }
  } else {
    // Determine the highest position the new format can be inserted at.
    let position = +Infinity;
    for (let index = startIndex; index &lt; endIndex; index++) {
      if (newFormats[index]) {
        newFormats[index] = newFormats[index].filter(({
          type
        }) =&gt; type !== format.type);
        const length = newFormats[index].length;
        if (length &lt; position) {
          position = length;
        }
      } else {
        newFormats[index] = [];
        position = 0;
      }
    }
    for (let index = startIndex; index &lt; endIndex; index++) {
      newFormats[index].splice(position, 0, format);
    }
  }
  return normaliseFormats({
    ...value,
    formats: newFormats,
    // Always revise active formats. This serves as a placeholder for new
    // inputs with the format so new input appears with the format applied,
    // and ensures a format of the same type uses the latest values.
    activeFormats: [...(activeFormats?.filter(({
      type
    }) =&gt; type !== format.type) || []), format]
  });
}

;// ./node_modules/@wordpress/rich-text/build-module/create-element.js
/**
 * Parse the given HTML into a body element.
 *
 * Note: The current implementation will return a shared reference, reset on
 * each call to `createElement`. Therefore, you should not hold a reference to
 * the value to operate upon asynchronously, as it may have unexpected results.
 *
 * @param {HTMLDocument} document The HTML document to use to parse.
 * @param {string}       html     The HTML to parse.
 *
 * @return {HTMLBodyElement} Body element with parsed HTML.
 */
function createElement({
  implementation
}, html) {
  // Because `createHTMLDocument` is an expensive operation, and with this
  // function being internal to `rich-text` (full control in avoiding a risk
  // of asynchronous operations on the shared reference), a single document
  // is reused and reset for each call to the function.
  if (!createElement.body) {
    createElement.body = implementation.createHTMLDocument(&#039;&#039;).body;
  }
  createElement.body.innerHTML = html;
  return createElement.body;
}

;// ./node_modules/@wordpress/rich-text/build-module/special-characters.js
/**
 * Object replacement character, used as a placeholder for objects.
 */
const OBJECT_REPLACEMENT_CHARACTER = &#039;\ufffc&#039;;

/**
 * Zero width non-breaking space, used as padding in the editable DOM tree when
 * it is empty otherwise.
 */
const ZWNBSP = &#039;\ufeff&#039;;

;// external [&quot;wp&quot;,&quot;escapeHtml&quot;]
const external_wp_escapeHtml_namespaceObject = window[&quot;wp&quot;][&quot;escapeHtml&quot;];
;// ./node_modules/@wordpress/rich-text/build-module/get-active-formats.js
/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */
/** @typedef {import(&#039;./types&#039;).RichTextFormatList} RichTextFormatList */

/**
 * Internal dependencies
 */


/**
 * Gets the all format objects at the start of the selection.
 *
 * @param {RichTextValue} value                Value to inspect.
 * @param {Array}         EMPTY_ACTIVE_FORMATS Array to return if there are no
 *                                             active formats.
 *
 * @return {RichTextFormatList} Active format objects.
 */
function getActiveFormats(value, EMPTY_ACTIVE_FORMATS = []) {
  const {
    formats,
    start,
    end,
    activeFormats
  } = value;
  if (start === undefined) {
    return EMPTY_ACTIVE_FORMATS;
  }
  if (start === end) {
    // For a collapsed caret, it is possible to override the active formats.
    if (activeFormats) {
      return activeFormats;
    }
    const formatsBefore = formats[start - 1] || EMPTY_ACTIVE_FORMATS;
    const formatsAfter = formats[start] || EMPTY_ACTIVE_FORMATS;

    // By default, select the lowest amount of formats possible (which means
    // the caret is positioned outside the format boundary). The user can
    // then use arrow keys to define `activeFormats`.
    if (formatsBefore.length &lt; formatsAfter.length) {
      return formatsBefore;
    }
    return formatsAfter;
  }

  // If there&#039;s no formats at the start index, there are not active formats.
  if (!formats[start]) {
    return EMPTY_ACTIVE_FORMATS;
  }
  const selectedFormats = formats.slice(start, end);

  // Clone the formats so we&#039;re not mutating the live value.
  const _activeFormats = [...selectedFormats[0]];
  let i = selectedFormats.length;

  // For performance reasons, start from the end where it&#039;s much quicker to
  // realise that there are no active formats.
  while (i--) {
    const formatsAtIndex = selectedFormats[i];

    // If we run into any index without formats, we&#039;re sure that there&#039;s no
    // active formats.
    if (!formatsAtIndex) {
      return EMPTY_ACTIVE_FORMATS;
    }
    let ii = _activeFormats.length;

    // Loop over the active formats and remove any that are not present at
    // the current index.
    while (ii--) {
      const format = _activeFormats[ii];
      if (!formatsAtIndex.find(_format =&gt; isFormatEqual(format, _format))) {
        _activeFormats.splice(ii, 1);
      }
    }

    // If there are no active formats, we can stop.
    if (_activeFormats.length === 0) {
      return EMPTY_ACTIVE_FORMATS;
    }
  }
  return _activeFormats || EMPTY_ACTIVE_FORMATS;
}

;// ./node_modules/@wordpress/rich-text/build-module/get-format-type.js
/**
 * WordPress dependencies
 */

/**
 * Internal dependencies
 */


/** @typedef {import(&#039;./register-format-type&#039;).RichTextFormatType} RichTextFormatType */

/**
 * Returns a registered format type.
 *
 * @param {string} name Format name.
 *
 * @return {RichTextFormatType|undefined} Format type.
 */
function get_format_type_getFormatType(name) {
  return (0,external_wp_data_namespaceObject.select)(store).getFormatType(name);
}

;// ./node_modules/@wordpress/rich-text/build-module/to-tree.js
/**
 * Internal dependencies
 */




function restoreOnAttributes(attributes, isEditableTree) {
  if (isEditableTree) {
    return attributes;
  }
  const newAttributes = {};
  for (const key in attributes) {
    let newKey = key;
    if (key.startsWith(&#039;data-disable-rich-text-&#039;)) {
      newKey = key.slice(&#039;data-disable-rich-text-&#039;.length);
    }
    newAttributes[newKey] = attributes[key];
  }
  return newAttributes;
}

/**
 * Converts a format object to information that can be used to create an element
 * from (type, attributes and object).
 *
 * @param {Object}  $1                        Named parameters.
 * @param {string}  $1.type                   The format type.
 * @param {string}  $1.tagName                The tag name.
 * @param {Object}  $1.attributes             The format attributes.
 * @param {Object}  $1.unregisteredAttributes The unregistered format
 *                                            attributes.
 * @param {boolean} $1.object                 Whether or not it is an object
 *                                            format.
 * @param {boolean} $1.boundaryClass          Whether or not to apply a boundary
 *                                            class.
 * @param {boolean} $1.isEditableTree
 *
 * @return {Object} Information to be used for element creation.
 */
function fromFormat({
  type,
  tagName,
  attributes,
  unregisteredAttributes,
  object,
  boundaryClass,
  isEditableTree
}) {
  const formatType = get_format_type_getFormatType(type);
  let elementAttributes = {};
  if (boundaryClass &amp;&amp; isEditableTree) {
    elementAttributes[&#039;data-rich-text-format-boundary&#039;] = &#039;true&#039;;
  }
  if (!formatType) {
    if (attributes) {
      elementAttributes = {
        ...attributes,
        ...elementAttributes
      };
    }
    return {
      type,
      attributes: restoreOnAttributes(elementAttributes, isEditableTree),
      object
    };
  }
  elementAttributes = {
    ...unregisteredAttributes,
    ...elementAttributes
  };
  for (const name in attributes) {
    const key = formatType.attributes ? formatType.attributes[name] : false;
    if (key) {
      elementAttributes[key] = attributes[name];
    } else {
      elementAttributes[name] = attributes[name];
    }
  }
  if (formatType.className) {
    if (elementAttributes.class) {
      elementAttributes.class = `${formatType.className} ${elementAttributes.class}`;
    } else {
      elementAttributes.class = formatType.className;
    }
  }

  // When a format is declared as non editable, make it non editable in the
  // editor.
  if (isEditableTree &amp;&amp; formatType.contentEditable === false) {
    elementAttributes.contenteditable = &#039;false&#039;;
  }
  return {
    type: tagName || formatType.tagName,
    object: formatType.object,
    attributes: restoreOnAttributes(elementAttributes, isEditableTree)
  };
}

/**
 * Checks if both arrays of formats up until a certain index are equal.
 *
 * @param {Array}  a     Array of formats to compare.
 * @param {Array}  b     Array of formats to compare.
 * @param {number} index Index to check until.
 */
function isEqualUntil(a, b, index) {
  do {
    if (a[index] !== b[index]) {
      return false;
    }
  } while (index--);
  return true;
}
function toTree({
  value,
  preserveWhiteSpace,
  createEmpty,
  append,
  getLastChild,
  getParent,
  isText,
  getText,
  remove,
  appendText,
  onStartIndex,
  onEndIndex,
  isEditableTree,
  placeholder
}) {
  const {
    formats,
    replacements,
    text,
    start,
    end
  } = value;
  const formatsLength = formats.length + 1;
  const tree = createEmpty();
  const activeFormats = getActiveFormats(value);
  const deepestActiveFormat = activeFormats[activeFormats.length - 1];
  let lastCharacterFormats;
  let lastCharacter;
  append(tree, &#039;&#039;);
  for (let i = 0; i &lt; formatsLength; i++) {
    const character = text.charAt(i);
    const shouldInsertPadding = isEditableTree &amp;&amp; (
    // Pad the line if the line is empty.
    !lastCharacter ||
    // Pad the line if the previous character is a line break, otherwise
    // the line break won&#039;t be visible.
    lastCharacter === &#039;\n&#039;);
    const characterFormats = formats[i];
    let pointer = getLastChild(tree);
    if (characterFormats) {
      characterFormats.forEach((format, formatIndex) =&gt; {
        if (pointer &amp;&amp; lastCharacterFormats &amp;&amp;
        // Reuse the last element if all formats remain the same.
        isEqualUntil(characterFormats, lastCharacterFormats, formatIndex)) {
          pointer = getLastChild(pointer);
          return;
        }
        const {
          type,
          tagName,
          attributes,
          unregisteredAttributes
        } = format;
        const boundaryClass = isEditableTree &amp;&amp; format === deepestActiveFormat;
        const parent = getParent(pointer);
        const newNode = append(parent, fromFormat({
          type,
          tagName,
          attributes,
          unregisteredAttributes,
          boundaryClass,
          isEditableTree
        }));
        if (isText(pointer) &amp;&amp; getText(pointer).length === 0) {
          remove(pointer);
        }
        pointer = append(newNode, &#039;&#039;);
      });
    }

    // If there is selection at 0, handle it before characters are inserted.
    if (i === 0) {
      if (onStartIndex &amp;&amp; start === 0) {
        onStartIndex(tree, pointer);
      }
      if (onEndIndex &amp;&amp; end === 0) {
        onEndIndex(tree, pointer);
      }
    }
    if (character === OBJECT_REPLACEMENT_CHARACTER) {
      const replacement = replacements[i];
      if (!replacement) {
        continue;
      }
      const {
        type,
        attributes,
        innerHTML
      } = replacement;
      const formatType = get_format_type_getFormatType(type);
      if (isEditableTree &amp;&amp; type === &#039;#comment&#039;) {
        pointer = append(getParent(pointer), {
          type: &#039;span&#039;,
          attributes: {
            contenteditable: &#039;false&#039;,
            &#039;data-rich-text-comment&#039;: attributes[&#039;data-rich-text-comment&#039;]
          }
        });
        append(append(pointer, {
          type: &#039;span&#039;
        }), attributes[&#039;data-rich-text-comment&#039;].trim());
      } else if (!isEditableTree &amp;&amp; type === &#039;script&#039;) {
        pointer = append(getParent(pointer), fromFormat({
          type: &#039;script&#039;,
          isEditableTree
        }));
        append(pointer, {
          html: decodeURIComponent(attributes[&#039;data-rich-text-script&#039;])
        });
      } else if (formatType?.contentEditable === false) {
        // For non editable formats, render the stored inner HTML.
        pointer = append(getParent(pointer), fromFormat({
          ...replacement,
          isEditableTree,
          boundaryClass: start === i &amp;&amp; end === i + 1
        }));
        if (innerHTML) {
          append(pointer, {
            html: innerHTML
          });
        }
      } else {
        pointer = append(getParent(pointer), fromFormat({
          ...replacement,
          object: true,
          isEditableTree
        }));
      }
      // Ensure pointer is text node.
      pointer = append(getParent(pointer), &#039;&#039;);
    } else if (!preserveWhiteSpace &amp;&amp; character === &#039;\n&#039;) {
      pointer = append(getParent(pointer), {
        type: &#039;br&#039;,
        attributes: isEditableTree ? {
          &#039;data-rich-text-line-break&#039;: &#039;true&#039;
        } : undefined,
        object: true
      });
      // Ensure pointer is text node.
      pointer = append(getParent(pointer), &#039;&#039;);
    } else if (!isText(pointer)) {
      pointer = append(getParent(pointer), character);
    } else {
      appendText(pointer, character);
    }
    if (onStartIndex &amp;&amp; start === i + 1) {
      onStartIndex(tree, pointer);
    }
    if (onEndIndex &amp;&amp; end === i + 1) {
      onEndIndex(tree, pointer);
    }
    if (shouldInsertPadding &amp;&amp; i === text.length) {
      append(getParent(pointer), ZWNBSP);

      // We CANNOT use CSS to add a placeholder with pseudo elements on
      // the main block wrappers because that could clash with theme CSS.
      if (placeholder &amp;&amp; text.length === 0) {
        append(getParent(pointer), {
          type: &#039;span&#039;,
          attributes: {
            &#039;data-rich-text-placeholder&#039;: placeholder,
            // Necessary to prevent the placeholder from catching
            // selection and being editable.
            style: &#039;pointer-events:none;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;&#039;
          }
        });
      }
    }
    lastCharacterFormats = characterFormats;
    lastCharacter = character;
  }
  return tree;
}

;// ./node_modules/@wordpress/rich-text/build-module/to-html-string.js
/**
 * WordPress dependencies
 */



/**
 * Internal dependencies
 */



/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Create an HTML string from a Rich Text value.
 *
 * @param {Object}        $1                      Named arguments.
 * @param {RichTextValue} $1.value                Rich text value.
 * @param {boolean}       [$1.preserveWhiteSpace] Preserves newlines if true.
 *
 * @return {string} HTML string.
 */
function toHTMLString({
  value,
  preserveWhiteSpace
}) {
  const tree = toTree({
    value,
    preserveWhiteSpace,
    createEmpty,
    append,
    getLastChild,
    getParent,
    isText,
    getText,
    remove,
    appendText
  });
  return createChildrenHTML(tree.children);
}
function createEmpty() {
  return {};
}
function getLastChild({
  children
}) {
  return children &amp;&amp; children[children.length - 1];
}
function append(parent, object) {
  if (typeof object === &#039;string&#039;) {
    object = {
      text: object
    };
  }
  object.parent = parent;
  parent.children = parent.children || [];
  parent.children.push(object);
  return object;
}
function appendText(object, text) {
  object.text += text;
}
function getParent({
  parent
}) {
  return parent;
}
function isText({
  text
}) {
  return typeof text === &#039;string&#039;;
}
function getText({
  text
}) {
  return text;
}
function remove(object) {
  const index = object.parent.children.indexOf(object);
  if (index !== -1) {
    object.parent.children.splice(index, 1);
  }
  return object;
}
function createElementHTML({
  type,
  attributes,
  object,
  children
}) {
  if (type === &#039;#comment&#039;) {
    // We can&#039;t restore the original comment delimiters, because once parsed
    // into DOM nodes, we don&#039;t have the information. But in the future we
    // could allow comment handlers to specify custom delimiters, for
    // example `&lt;/{comment-content}&gt;` for Bits, where `comment-content`
    // would be `/{bit-name}` or `__{translatable-string}` (TBD).
    return `&lt;!--${attributes[&#039;data-rich-text-comment&#039;]}--&gt;`;
  }
  let attributeString = &#039;&#039;;
  for (const key in attributes) {
    if (!(0,external_wp_escapeHtml_namespaceObject.isValidAttributeName)(key)) {
      continue;
    }
    attributeString += ` ${key}=&quot;${(0,external_wp_escapeHtml_namespaceObject.escapeAttribute)(attributes[key])}&quot;`;
  }
  if (object) {
    return `&lt;${type}${attributeString}&gt;`;
  }
  return `&lt;${type}${attributeString}&gt;${createChildrenHTML(children)}&lt;/${type}&gt;`;
}
function createChildrenHTML(children = []) {
  return children.map(child =&gt; {
    if (child.html !== undefined) {
      return child.html;
    }
    return child.text === undefined ? createElementHTML(child) : (0,external_wp_escapeHtml_namespaceObject.escapeEditableHTML)(child.text);
  }).join(&#039;&#039;);
}

;// ./node_modules/@wordpress/rich-text/build-module/get-text-content.js
/**
 * Internal dependencies
 */


/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Get the textual content of a Rich Text value. This is similar to
 * `Element.textContent`.
 *
 * @param {RichTextValue} value Value to use.
 *
 * @return {string} The text content.
 */
function getTextContent({
  text
}) {
  return text.replace(OBJECT_REPLACEMENT_CHARACTER, &#039;&#039;);
}

;// ./node_modules/@wordpress/rich-text/build-module/create.js
/**
 * WordPress dependencies
 */


/**
 * Internal dependencies
 */







/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

function createEmptyValue() {
  return {
    formats: [],
    replacements: [],
    text: &#039;&#039;
  };
}
function toFormat({
  tagName,
  attributes
}) {
  let formatType;
  if (attributes &amp;&amp; attributes.class) {
    formatType = (0,external_wp_data_namespaceObject.select)(store).getFormatTypeForClassName(attributes.class);
    if (formatType) {
      // Preserve any additional classes.
      attributes.class = ` ${attributes.class} `.replace(` ${formatType.className} `, &#039; &#039;).trim();
      if (!attributes.class) {
        delete attributes.class;
      }
    }
  }
  if (!formatType) {
    formatType = (0,external_wp_data_namespaceObject.select)(store).getFormatTypeForBareElement(tagName);
  }
  if (!formatType) {
    return attributes ? {
      type: tagName,
      attributes
    } : {
      type: tagName
    };
  }
  if (formatType.__experimentalCreatePrepareEditableTree &amp;&amp; !formatType.__experimentalCreateOnChangeEditableValue) {
    return null;
  }
  if (!attributes) {
    return {
      formatType,
      type: formatType.name,
      tagName
    };
  }
  const registeredAttributes = {};
  const unregisteredAttributes = {};
  const _attributes = {
    ...attributes
  };
  for (const key in formatType.attributes) {
    const name = formatType.attributes[key];
    registeredAttributes[key] = _attributes[name];

    // delete the attribute and what&#039;s left is considered
    // to be unregistered.
    delete _attributes[name];
    if (typeof registeredAttributes[key] === &#039;undefined&#039;) {
      delete registeredAttributes[key];
    }
  }
  for (const name in _attributes) {
    unregisteredAttributes[name] = attributes[name];
  }
  if (formatType.contentEditable === false) {
    delete unregisteredAttributes.contenteditable;
  }
  return {
    formatType,
    type: formatType.name,
    tagName,
    attributes: registeredAttributes,
    unregisteredAttributes
  };
}

/**
 * The RichTextData class is used to instantiate a wrapper around rich text
 * values, with methods that can be used to transform or manipulate the data.
 *
 * - Create an empty instance: `new RichTextData()`.
 * - Create one from an HTML string: `RichTextData.fromHTMLString(
 *   &#039;&lt;em&gt;hello&lt;/em&gt;&#039; )`.
 * - Create one from a wrapper HTMLElement: `RichTextData.fromHTMLElement(
 *   document.querySelector( &#039;p&#039; ) )`.
 * - Create one from plain text: `RichTextData.fromPlainText( &#039;1\n2&#039; )`.
 * - Create one from a rich text value: `new RichTextData( { text: &#039;...&#039;,
 *   formats: [ ... ] } )`.
 *
 * @todo Add methods to manipulate the data, such as applyFormat, slice etc.
 */
class RichTextData {
  #value;
  static empty() {
    return new RichTextData();
  }
  static fromPlainText(text) {
    return new RichTextData(create({
      text
    }));
  }
  static fromHTMLString(html) {
    return new RichTextData(create({
      html
    }));
  }
  /**
   * Create a RichTextData instance from an HTML element.
   *
   * @param {HTMLElement}                    htmlElement The HTML element to create the instance from.
   * @param {{preserveWhiteSpace?: boolean}} options     Options.
   * @return {RichTextData} The RichTextData instance.
   */
  static fromHTMLElement(htmlElement, options = {}) {
    const {
      preserveWhiteSpace = false
    } = options;
    const element = preserveWhiteSpace ? htmlElement : collapseWhiteSpace(htmlElement);
    const richTextData = new RichTextData(create({
      element
    }));
    Object.defineProperty(richTextData, &#039;originalHTML&#039;, {
      value: htmlElement.innerHTML
    });
    return richTextData;
  }
  constructor(init = createEmptyValue()) {
    this.#value = init;
  }
  toPlainText() {
    return getTextContent(this.#value);
  }
  // We could expose `toHTMLElement` at some point as well, but we&#039;d only use
  // it internally.
  /**
   * Convert the rich text value to an HTML string.
   *
   * @param {{preserveWhiteSpace?: boolean}} options Options.
   * @return {string} The HTML string.
   */
  toHTMLString({
    preserveWhiteSpace
  } = {}) {
    return this.originalHTML || toHTMLString({
      value: this.#value,
      preserveWhiteSpace
    });
  }
  valueOf() {
    return this.toHTMLString();
  }
  toString() {
    return this.toHTMLString();
  }
  toJSON() {
    return this.toHTMLString();
  }
  get length() {
    return this.text.length;
  }
  get formats() {
    return this.#value.formats;
  }
  get replacements() {
    return this.#value.replacements;
  }
  get text() {
    return this.#value.text;
  }
}
for (const name of Object.getOwnPropertyNames(String.prototype)) {
  if (RichTextData.prototype.hasOwnProperty(name)) {
    continue;
  }
  Object.defineProperty(RichTextData.prototype, name, {
    value(...args) {
      // Should we convert back to RichTextData?
      return this.toHTMLString()[name](...args);
    }
  });
}

/**
 * Create a RichText value from an `Element` tree (DOM), an HTML string or a
 * plain text string, with optionally a `Range` object to set the selection. If
 * called without any input, an empty value will be created. The optional
 * functions can be used to filter out content.
 *
 * A value will have the following shape, which you are strongly encouraged not
 * to modify without the use of helper functions:
 *
 * ```js
 * {
 *   text: string,
 *   formats: Array,
 *   replacements: Array,
 *   ?start: number,
 *   ?end: number,
 * }
 * ```
 *
 * As you can see, text and formatting are separated. `text` holds the text,
 * including any replacement characters for objects and lines. `formats`,
 * `objects` and `lines` are all sparse arrays of the same length as `text`. It
 * holds information about the formatting at the relevant text indices. Finally
 * `start` and `end` state which text indices are selected. They are only
 * provided if a `Range` was given.
 *
 * @param {Object}  [$1]                          Optional named arguments.
 * @param {Element} [$1.element]                  Element to create value from.
 * @param {string}  [$1.text]                     Text to create value from.
 * @param {string}  [$1.html]                     HTML to create value from.
 * @param {Range}   [$1.range]                    Range to create value from.
 * @param {boolean} [$1.__unstableIsEditableTree]
 * @return {RichTextValue} A rich text value.
 */
function create({
  element,
  text,
  html,
  range,
  __unstableIsEditableTree: isEditableTree
} = {}) {
  if (html instanceof RichTextData) {
    return {
      text: html.text,
      formats: html.formats,
      replacements: html.replacements
    };
  }
  if (typeof text === &#039;string&#039; &amp;&amp; text.length &gt; 0) {
    return {
      formats: Array(text.length),
      replacements: Array(text.length),
      text
    };
  }
  if (typeof html === &#039;string&#039; &amp;&amp; html.length &gt; 0) {
    // It does not matter which document this is, we&#039;re just using it to
    // parse.
    element = createElement(document, html);
  }
  if (typeof element !== &#039;object&#039;) {
    return createEmptyValue();
  }
  return createFromElement({
    element,
    range,
    isEditableTree
  });
}

/**
 * Helper to accumulate the value&#039;s selection start and end from the current
 * node and range.
 *
 * @param {Object} accumulator Object to accumulate into.
 * @param {Node}   node        Node to create value with.
 * @param {Range}  range       Range to create value with.
 * @param {Object} value       Value that is being accumulated.
 */
function accumulateSelection(accumulator, node, range, value) {
  if (!range) {
    return;
  }
  const {
    parentNode
  } = node;
  const {
    startContainer,
    startOffset,
    endContainer,
    endOffset
  } = range;
  const currentLength = accumulator.text.length;

  // Selection can be extracted from value.
  if (value.start !== undefined) {
    accumulator.start = currentLength + value.start;
    // Range indicates that the current node has selection.
  } else if (node === startContainer &amp;&amp; node.nodeType === node.TEXT_NODE) {
    accumulator.start = currentLength + startOffset;
    // Range indicates that the current node is selected.
  } else if (parentNode === startContainer &amp;&amp; node === startContainer.childNodes[startOffset]) {
    accumulator.start = currentLength;
    // Range indicates that the selection is after the current node.
  } else if (parentNode === startContainer &amp;&amp; node === startContainer.childNodes[startOffset - 1]) {
    accumulator.start = currentLength + value.text.length;
    // Fallback if no child inside handled the selection.
  } else if (node === startContainer) {
    accumulator.start = currentLength;
  }

  // Selection can be extracted from value.
  if (value.end !== undefined) {
    accumulator.end = currentLength + value.end;
    // Range indicates that the current node has selection.
  } else if (node === endContainer &amp;&amp; node.nodeType === node.TEXT_NODE) {
    accumulator.end = currentLength + endOffset;
    // Range indicates that the current node is selected.
  } else if (parentNode === endContainer &amp;&amp; node === endContainer.childNodes[endOffset - 1]) {
    accumulator.end = currentLength + value.text.length;
    // Range indicates that the selection is before the current node.
  } else if (parentNode === endContainer &amp;&amp; node === endContainer.childNodes[endOffset]) {
    accumulator.end = currentLength;
    // Fallback if no child inside handled the selection.
  } else if (node === endContainer) {
    accumulator.end = currentLength + endOffset;
  }
}

/**
 * Adjusts the start and end offsets from a range based on a text filter.
 *
 * @param {Node}     node   Node of which the text should be filtered.
 * @param {Range}    range  The range to filter.
 * @param {Function} filter Function to use to filter the text.
 *
 * @return {Object|void} Object containing range properties.
 */
function filterRange(node, range, filter) {
  if (!range) {
    return;
  }
  const {
    startContainer,
    endContainer
  } = range;
  let {
    startOffset,
    endOffset
  } = range;
  if (node === startContainer) {
    startOffset = filter(node.nodeValue.slice(0, startOffset)).length;
  }
  if (node === endContainer) {
    endOffset = filter(node.nodeValue.slice(0, endOffset)).length;
  }
  return {
    startContainer,
    startOffset,
    endContainer,
    endOffset
  };
}

/**
 * Collapse any whitespace used for HTML formatting to one space character,
 * because it will also be displayed as such by the browser.
 *
 * We need to strip it from the content because we use white-space: pre-wrap for
 * displaying editable rich text. Without using white-space: pre-wrap, the
 * browser will litter the content with non breaking spaces, among other issues.
 * See packages/rich-text/src/component/use-default-style.js.
 *
 * @see
 * https://developer.mozilla.org/en-US/docs/Web/CSS/white-space-collapse#collapsing_of_white_space
 *
 * @param {HTMLElement} element
 * @param {boolean}     isRoot
 *
 * @return {HTMLElement} New element with collapsed whitespace.
 */
function collapseWhiteSpace(element, isRoot = true) {
  const clone = element.cloneNode(true);
  clone.normalize();
  Array.from(clone.childNodes).forEach((node, i, nodes) =&gt; {
    if (node.nodeType === node.TEXT_NODE) {
      let newNodeValue = node.nodeValue;
      if (/[\n\t\r\f]/.test(newNodeValue)) {
        newNodeValue = newNodeValue.replace(/[\n\t\r\f]+/g, &#039; &#039;);
      }
      if (newNodeValue.indexOf(&#039;  &#039;) !== -1) {
        newNodeValue = newNodeValue.replace(/ {2,}/g, &#039; &#039;);
      }
      if (i === 0 &amp;&amp; newNodeValue.startsWith(&#039; &#039;)) {
        newNodeValue = newNodeValue.slice(1);
      } else if (isRoot &amp;&amp; i === nodes.length - 1 &amp;&amp; newNodeValue.endsWith(&#039; &#039;)) {
        newNodeValue = newNodeValue.slice(0, -1);
      }
      node.nodeValue = newNodeValue;
    } else if (node.nodeType === node.ELEMENT_NODE) {
      collapseWhiteSpace(node, false);
    }
  });
  return clone;
}

/**
 * We need to normalise line breaks to `\n` so they are consistent across
 * platforms and serialised properly. Not removing \r would cause it to
 * linger and result in double line breaks when whitespace is preserved.
 */
const CARRIAGE_RETURN = &#039;\r&#039;;

/**
 * Removes reserved characters used by rich-text (zero width non breaking spaces
 * added by `toTree` and object replacement characters).
 *
 * @param {string} string
 */
function removeReservedCharacters(string) {
  // with the global flag, note that we should create a new regex each time OR
  // reset lastIndex state.
  return string.replace(new RegExp(`[${ZWNBSP}${OBJECT_REPLACEMENT_CHARACTER}${CARRIAGE_RETURN}]`, &#039;gu&#039;), &#039;&#039;);
}

/**
 * Creates a Rich Text value from a DOM element and range.
 *
 * @param {Object}  $1                  Named arguments.
 * @param {Element} [$1.element]        Element to create value from.
 * @param {Range}   [$1.range]          Range to create value from.
 * @param {boolean} [$1.isEditableTree]
 *
 * @return {RichTextValue} A rich text value.
 */
function createFromElement({
  element,
  range,
  isEditableTree
}) {
  const accumulator = createEmptyValue();
  if (!element) {
    return accumulator;
  }
  if (!element.hasChildNodes()) {
    accumulateSelection(accumulator, element, range, createEmptyValue());
    return accumulator;
  }
  const length = element.childNodes.length;

  // Optimise for speed.
  for (let index = 0; index &lt; length; index++) {
    const node = element.childNodes[index];
    const tagName = node.nodeName.toLowerCase();
    if (node.nodeType === node.TEXT_NODE) {
      const text = removeReservedCharacters(node.nodeValue);
      range = filterRange(node, range, removeReservedCharacters);
      accumulateSelection(accumulator, node, range, {
        text
      });
      // Create a sparse array of the same length as `text`, in which
      // formats can be added.
      accumulator.formats.length += text.length;
      accumulator.replacements.length += text.length;
      accumulator.text += text;
      continue;
    }
    if (node.nodeType === node.COMMENT_NODE || node.nodeType === node.ELEMENT_NODE &amp;&amp; node.tagName === &#039;SPAN&#039; &amp;&amp; node.hasAttribute(&#039;data-rich-text-comment&#039;)) {
      const value = {
        formats: [,],
        replacements: [{
          type: &#039;#comment&#039;,
          attributes: {
            &#039;data-rich-text-comment&#039;: node.nodeType === node.COMMENT_NODE ? node.nodeValue : node.getAttribute(&#039;data-rich-text-comment&#039;)
          }
        }],
        text: OBJECT_REPLACEMENT_CHARACTER
      };
      accumulateSelection(accumulator, node, range, value);
      mergePair(accumulator, value);
      continue;
    }
    if (node.nodeType !== node.ELEMENT_NODE) {
      continue;
    }
    if (isEditableTree &amp;&amp;
    // Ignore any line breaks that are not inserted by us.
    tagName === &#039;br&#039; &amp;&amp; !node.getAttribute(&#039;data-rich-text-line-break&#039;)) {
      accumulateSelection(accumulator, node, range, createEmptyValue());
      continue;
    }
    if (tagName === &#039;script&#039;) {
      const value = {
        formats: [,],
        replacements: [{
          type: tagName,
          attributes: {
            &#039;data-rich-text-script&#039;: node.getAttribute(&#039;data-rich-text-script&#039;) || encodeURIComponent(node.innerHTML)
          }
        }],
        text: OBJECT_REPLACEMENT_CHARACTER
      };
      accumulateSelection(accumulator, node, range, value);
      mergePair(accumulator, value);
      continue;
    }
    if (tagName === &#039;br&#039;) {
      accumulateSelection(accumulator, node, range, createEmptyValue());
      mergePair(accumulator, create({
        text: &#039;\n&#039;
      }));
      continue;
    }
    const format = toFormat({
      tagName,
      attributes: getAttributes({
        element: node
      })
    });

    // When a format type is declared as not editable, replace it with an
    // object replacement character and preserve the inner HTML.
    if (format?.formatType?.contentEditable === false) {
      delete format.formatType;
      accumulateSelection(accumulator, node, range, createEmptyValue());
      mergePair(accumulator, {
        formats: [,],
        replacements: [{
          ...format,
          innerHTML: node.innerHTML
        }],
        text: OBJECT_REPLACEMENT_CHARACTER
      });
      continue;
    }
    if (format) {
      delete format.formatType;
    }
    const value = createFromElement({
      element: node,
      range,
      isEditableTree
    });
    accumulateSelection(accumulator, node, range, value);

    // Ignore any placeholders, but keep their content since the browser
    // might insert text inside them when the editable element is flex.
    if (!format || node.getAttribute(&#039;data-rich-text-placeholder&#039;)) {
      mergePair(accumulator, value);
    } else if (value.text.length === 0) {
      if (format.attributes) {
        mergePair(accumulator, {
          formats: [,],
          replacements: [format],
          text: OBJECT_REPLACEMENT_CHARACTER
        });
      }
    } else {
      // Indices should share a reference to the same formats array.
      // Only create a new reference if `formats` changes.
      function mergeFormats(formats) {
        if (mergeFormats.formats === formats) {
          return mergeFormats.newFormats;
        }
        const newFormats = formats ? [format, ...formats] : [format];
        mergeFormats.formats = formats;
        mergeFormats.newFormats = newFormats;
        return newFormats;
      }

      // Since the formats parameter can be `undefined`, preset
      // `mergeFormats` with a new reference.
      mergeFormats.newFormats = [format];
      mergePair(accumulator, {
        ...value,
        formats: Array.from(value.formats, mergeFormats)
      });
    }
  }
  return accumulator;
}

/**
 * Gets the attributes of an element in object shape.
 *
 * @param {Object}  $1         Named arguments.
 * @param {Element} $1.element Element to get attributes from.
 *
 * @return {Object|void} Attribute object or `undefined` if the element has no
 *                       attributes.
 */
function getAttributes({
  element
}) {
  if (!element.hasAttributes()) {
    return;
  }
  const length = element.attributes.length;
  let accumulator;

  // Optimise for speed.
  for (let i = 0; i &lt; length; i++) {
    const {
      name,
      value
    } = element.attributes[i];
    if (name.indexOf(&#039;data-rich-text-&#039;) === 0) {
      continue;
    }
    const safeName = /^on/i.test(name) ? &#039;data-disable-rich-text-&#039; + name : name;
    accumulator = accumulator || {};
    accumulator[safeName] = value;
  }
  return accumulator;
}

;// ./node_modules/@wordpress/rich-text/build-module/concat.js
/**
 * Internal dependencies
 */




/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Concats a pair of rich text values. Not that this mutates `a` and does NOT
 * normalise formats!
 *
 * @param {Object} a Value to mutate.
 * @param {Object} b Value to add read from.
 *
 * @return {Object} `a`, mutated.
 */
function mergePair(a, b) {
  a.formats = a.formats.concat(b.formats);
  a.replacements = a.replacements.concat(b.replacements);
  a.text += b.text;
  return a;
}

/**
 * Combine all Rich Text values into one. This is similar to
 * `String.prototype.concat`.
 *
 * @param {...RichTextValue} values Objects to combine.
 *
 * @return {RichTextValue} A new value combining all given records.
 */
function concat(...values) {
  return normaliseFormats(values.reduce(mergePair, create()));
}

;// ./node_modules/@wordpress/rich-text/build-module/get-active-format.js
/**
 * Internal dependencies
 */


/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */
/** @typedef {import(&#039;./types&#039;).RichTextFormat} RichTextFormat */

/**
 * Gets the format object by type at the start of the selection. This can be
 * used to get e.g. the URL of a link format at the current selection, but also
 * to check if a format is active at the selection. Returns undefined if there
 * is no format at the selection.
 *
 * @param {RichTextValue} value      Value to inspect.
 * @param {string}        formatType Format type to look for.
 *
 * @return {RichTextFormat|undefined} Active format object of the specified
 *                                    type, or undefined.
 */
function getActiveFormat(value, formatType) {
  return getActiveFormats(value).find(({
    type
  }) =&gt; type === formatType);
}

;// ./node_modules/@wordpress/rich-text/build-module/get-active-object.js
/**
 * Internal dependencies
 */



/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */
/** @typedef {import(&#039;./types&#039;).RichTextFormat} RichTextFormat */

/**
 * Gets the active object, if there is any.
 *
 * @param {RichTextValue} value Value to inspect.
 *
 * @return {RichTextFormat|void} Active object, or undefined.
 */
function getActiveObject({
  start,
  end,
  replacements,
  text
}) {
  if (start + 1 !== end || text[start] !== OBJECT_REPLACEMENT_CHARACTER) {
    return;
  }
  return replacements[start];
}

;// ./node_modules/@wordpress/rich-text/build-module/is-collapsed.js
/**
 * Internal dependencies
 */

/**
 * Check if the selection of a Rich Text value is collapsed or not. Collapsed
 * means that no characters are selected, but there is a caret present. If there
 * is no selection, `undefined` will be returned. This is similar to
 * `window.getSelection().isCollapsed()`.
 *
 * @param props       The rich text value to check.
 * @param props.start
 * @param props.end
 * @return True if the selection is collapsed, false if not, undefined if there is no selection.
 */
function isCollapsed({
  start,
  end
}) {
  if (start === undefined || end === undefined) {
    return;
  }
  return start === end;
}

;// ./node_modules/@wordpress/rich-text/build-module/is-empty.js
/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Check if a Rich Text value is Empty, meaning it contains no text or any
 * objects (such as images).
 *
 * @param {RichTextValue} value Value to use.
 *
 * @return {boolean} True if the value is empty, false if not.
 */
function isEmpty({
  text
}) {
  return text.length === 0;
}

;// ./node_modules/@wordpress/rich-text/build-module/join.js
/**
 * Internal dependencies
 */




/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Combine an array of Rich Text values into one, optionally separated by
 * `separator`, which can be a Rich Text value, HTML string, or plain text
 * string. This is similar to `Array.prototype.join`.
 *
 * @param {Array&lt;RichTextValue&gt;} values      An array of values to join.
 * @param {string|RichTextValue} [separator] Separator string or value.
 *
 * @return {RichTextValue} A new combined value.
 */
function join(values, separator = &#039;&#039;) {
  if (typeof separator === &#039;string&#039;) {
    separator = create({
      text: separator
    });
  }
  return normaliseFormats(values.reduce((accumulator, {
    formats,
    replacements,
    text
  }) =&gt; ({
    formats: accumulator.formats.concat(separator.formats, formats),
    replacements: accumulator.replacements.concat(separator.replacements, replacements),
    text: accumulator.text + separator.text + text
  })));
}

;// ./node_modules/@wordpress/rich-text/build-module/register-format-type.js
/**
 * WordPress dependencies
 */

/**
 * Internal dependencies
 */

/**
 * @typedef {Object} WPFormat
 *
 * @property {string}        name        A string identifying the format. Must be
 *                                       unique across all registered formats.
 * @property {string}        tagName     The HTML tag this format will wrap the
 *                                       selection with.
 * @property {boolean}       interactive Whether format makes content interactive or not.
 * @property {string | null} [className] A class to match the format.
 * @property {string}        title       Name of the format.
 * @property {Function}      edit        Should return a component for the user to
 *                                       interact with the new registered format.
 */

/**
 * Registers a new format provided a unique name and an object defining its
 * behavior.
 *
 * @param {string}   name     Format name.
 * @param {WPFormat} settings Format settings.
 *
 * @return {WPFormat|undefined} The format, if it has been successfully
 *                              registered; otherwise `undefined`.
 */
function registerFormatType(name, settings) {
  settings = {
    name,
    ...settings
  };
  if (typeof settings.name !== &#039;string&#039;) {
    window.console.error(&#039;Format names must be strings.&#039;);
    return;
  }
  if (!/^[a-z][a-z0-9-]*\/[a-z][a-z0-9-]*$/.test(settings.name)) {
    window.console.error(&#039;Format names must contain a namespace prefix, include only lowercase alphanumeric characters or dashes, and start with a letter. Example: my-plugin/my-custom-format&#039;);
    return;
  }
  if ((0,external_wp_data_namespaceObject.select)(store).getFormatType(settings.name)) {
    window.console.error(&#039;Format &quot;&#039; + settings.name + &#039;&quot; is already registered.&#039;);
    return;
  }
  if (typeof settings.tagName !== &#039;string&#039; || settings.tagName === &#039;&#039;) {
    window.console.error(&#039;Format tag names must be a string.&#039;);
    return;
  }
  if ((typeof settings.className !== &#039;string&#039; || settings.className === &#039;&#039;) &amp;&amp; settings.className !== null) {
    window.console.error(&#039;Format class names must be a string, or null to handle bare elements.&#039;);
    return;
  }
  if (!/^[_a-zA-Z]+[a-zA-Z0-9_-]*$/.test(settings.className)) {
    window.console.error(&#039;A class name must begin with a letter, followed by any number of hyphens, underscores, letters, or numbers.&#039;);
    return;
  }
  if (settings.className === null) {
    const formatTypeForBareElement = (0,external_wp_data_namespaceObject.select)(store).getFormatTypeForBareElement(settings.tagName);
    if (formatTypeForBareElement &amp;&amp; formatTypeForBareElement.name !== &#039;core/unknown&#039;) {
      window.console.error(`Format &quot;${formatTypeForBareElement.name}&quot; is already registered to handle bare tag name &quot;${settings.tagName}&quot;.`);
      return;
    }
  } else {
    const formatTypeForClassName = (0,external_wp_data_namespaceObject.select)(store).getFormatTypeForClassName(settings.className);
    if (formatTypeForClassName) {
      window.console.error(`Format &quot;${formatTypeForClassName.name}&quot; is already registered to handle class name &quot;${settings.className}&quot;.`);
      return;
    }
  }
  if (!(&#039;title&#039; in settings) || settings.title === &#039;&#039;) {
    window.console.error(&#039;The format &quot;&#039; + settings.name + &#039;&quot; must have a title.&#039;);
    return;
  }
  if (&#039;keywords&#039; in settings &amp;&amp; settings.keywords.length &gt; 3) {
    window.console.error(&#039;The format &quot;&#039; + settings.name + &#039;&quot; can have a maximum of 3 keywords.&#039;);
    return;
  }
  if (typeof settings.title !== &#039;string&#039;) {
    window.console.error(&#039;Format titles must be strings.&#039;);
    return;
  }
  (0,external_wp_data_namespaceObject.dispatch)(store).addFormatTypes(settings);
  return settings;
}

;// ./node_modules/@wordpress/rich-text/build-module/remove-format.js
/**
 * Internal dependencies
 */



/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Remove any format object from a Rich Text value by type from the given
 * `startIndex` to the given `endIndex`. Indices are retrieved from the
 * selection if none are provided.
 *
 * @param {RichTextValue} value        Value to modify.
 * @param {string}        formatType   Format type to remove.
 * @param {number}        [startIndex] Start index.
 * @param {number}        [endIndex]   End index.
 *
 * @return {RichTextValue} A new value with the format applied.
 */
function removeFormat(value, formatType, startIndex = value.start, endIndex = value.end) {
  const {
    formats,
    activeFormats
  } = value;
  const newFormats = formats.slice();

  // If the selection is collapsed, expand start and end to the edges of the
  // format.
  if (startIndex === endIndex) {
    const format = newFormats[startIndex]?.find(({
      type
    }) =&gt; type === formatType);
    if (format) {
      while (newFormats[startIndex]?.find(newFormat =&gt; newFormat === format)) {
        filterFormats(newFormats, startIndex, formatType);
        startIndex--;
      }
      endIndex++;
      while (newFormats[endIndex]?.find(newFormat =&gt; newFormat === format)) {
        filterFormats(newFormats, endIndex, formatType);
        endIndex++;
      }
    }
  } else {
    for (let i = startIndex; i &lt; endIndex; i++) {
      if (newFormats[i]) {
        filterFormats(newFormats, i, formatType);
      }
    }
  }
  return normaliseFormats({
    ...value,
    formats: newFormats,
    activeFormats: activeFormats?.filter(({
      type
    }) =&gt; type !== formatType) || []
  });
}
function filterFormats(formats, index, formatType) {
  const newFormats = formats[index].filter(({
    type
  }) =&gt; type !== formatType);
  if (newFormats.length) {
    formats[index] = newFormats;
  } else {
    delete formats[index];
  }
}

;// ./node_modules/@wordpress/rich-text/build-module/insert.js
/**
 * Internal dependencies
 */




/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Insert a Rich Text value, an HTML string, or a plain text string, into a
 * Rich Text value at the given `startIndex`. Any content between `startIndex`
 * and `endIndex` will be removed. Indices are retrieved from the selection if
 * none are provided.
 *
 * @param {RichTextValue}        value         Value to modify.
 * @param {RichTextValue|string} valueToInsert Value to insert.
 * @param {number}               [startIndex]  Start index.
 * @param {number}               [endIndex]    End index.
 *
 * @return {RichTextValue} A new value with the value inserted.
 */
function insert(value, valueToInsert, startIndex = value.start, endIndex = value.end) {
  const {
    formats,
    replacements,
    text
  } = value;
  if (typeof valueToInsert === &#039;string&#039;) {
    valueToInsert = create({
      text: valueToInsert
    });
  }
  const index = startIndex + valueToInsert.text.length;
  return normaliseFormats({
    formats: formats.slice(0, startIndex).concat(valueToInsert.formats, formats.slice(endIndex)),
    replacements: replacements.slice(0, startIndex).concat(valueToInsert.replacements, replacements.slice(endIndex)),
    text: text.slice(0, startIndex) + valueToInsert.text + text.slice(endIndex),
    start: index,
    end: index
  });
}

;// ./node_modules/@wordpress/rich-text/build-module/remove.js
/**
 * Internal dependencies
 */




/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Remove content from a Rich Text value between the given `startIndex` and
 * `endIndex`. Indices are retrieved from the selection if none are provided.
 *
 * @param {RichTextValue} value        Value to modify.
 * @param {number}        [startIndex] Start index.
 * @param {number}        [endIndex]   End index.
 *
 * @return {RichTextValue} A new value with the content removed.
 */
function remove_remove(value, startIndex, endIndex) {
  return insert(value, create(), startIndex, endIndex);
}

;// ./node_modules/@wordpress/rich-text/build-module/replace.js
/**
 * Internal dependencies
 */



/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Search a Rich Text value and replace the match(es) with `replacement`. This
 * is similar to `String.prototype.replace`.
 *
 * @param {RichTextValue}   value       The value to modify.
 * @param {RegExp|string}   pattern     A RegExp object or literal. Can also be
 *                                      a string. It is treated as a verbatim
 *                                      string and is not interpreted as a
 *                                      regular expression. Only the first
 *                                      occurrence will be replaced.
 * @param {Function|string} replacement The match or matches are replaced with
 *                                      the specified or the value returned by
 *                                      the specified function.
 *
 * @return {RichTextValue} A new value with replacements applied.
 */
function replace_replace({
  formats,
  replacements,
  text,
  start,
  end
}, pattern, replacement) {
  text = text.replace(pattern, (match, ...rest) =&gt; {
    const offset = rest[rest.length - 2];
    let newText = replacement;
    let newFormats;
    let newReplacements;
    if (typeof newText === &#039;function&#039;) {
      newText = replacement(match, ...rest);
    }
    if (typeof newText === &#039;object&#039;) {
      newFormats = newText.formats;
      newReplacements = newText.replacements;
      newText = newText.text;
    } else {
      newFormats = Array(newText.length);
      newReplacements = Array(newText.length);
      if (formats[offset]) {
        newFormats = newFormats.fill(formats[offset]);
      }
    }
    formats = formats.slice(0, offset).concat(newFormats, formats.slice(offset + match.length));
    replacements = replacements.slice(0, offset).concat(newReplacements, replacements.slice(offset + match.length));
    if (start) {
      start = end = offset + newText.length;
    }
    return newText;
  });
  return normaliseFormats({
    formats,
    replacements,
    text,
    start,
    end
  });
}

;// ./node_modules/@wordpress/rich-text/build-module/insert-object.js
/**
 * Internal dependencies
 */




/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */
/** @typedef {import(&#039;./types&#039;).RichTextFormat} RichTextFormat */

/**
 * Insert a format as an object into a Rich Text value at the given
 * `startIndex`. Any content between `startIndex` and `endIndex` will be
 * removed. Indices are retrieved from the selection if none are provided.
 *
 * @param {RichTextValue}  value          Value to modify.
 * @param {RichTextFormat} formatToInsert Format to insert as object.
 * @param {number}         [startIndex]   Start index.
 * @param {number}         [endIndex]     End index.
 *
 * @return {RichTextValue} A new value with the object inserted.
 */
function insertObject(value, formatToInsert, startIndex, endIndex) {
  const valueToInsert = {
    formats: [,],
    replacements: [formatToInsert],
    text: OBJECT_REPLACEMENT_CHARACTER
  };
  return insert(value, valueToInsert, startIndex, endIndex);
}

;// ./node_modules/@wordpress/rich-text/build-module/slice.js
/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Slice a Rich Text value from `startIndex` to `endIndex`. Indices are
 * retrieved from the selection if none are provided. This is similar to
 * `String.prototype.slice`.
 *
 * @param {RichTextValue} value        Value to modify.
 * @param {number}        [startIndex] Start index.
 * @param {number}        [endIndex]   End index.
 *
 * @return {RichTextValue} A new extracted value.
 */
function slice(value, startIndex = value.start, endIndex = value.end) {
  const {
    formats,
    replacements,
    text
  } = value;
  if (startIndex === undefined || endIndex === undefined) {
    return {
      ...value
    };
  }
  return {
    formats: formats.slice(startIndex, endIndex),
    replacements: replacements.slice(startIndex, endIndex),
    text: text.slice(startIndex, endIndex)
  };
}

;// ./node_modules/@wordpress/rich-text/build-module/split.js
/**
 * Internal dependencies
 */

/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Split a Rich Text value in two at the given `startIndex` and `endIndex`, or
 * split at the given separator. This is similar to `String.prototype.split`.
 * Indices are retrieved from the selection if none are provided.
 *
 * @param {RichTextValue} value
 * @param {number|string} [string] Start index, or string at which to split.
 *
 * @return {Array&lt;RichTextValue&gt;|undefined} An array of new values.
 */
function split({
  formats,
  replacements,
  text,
  start,
  end
}, string) {
  if (typeof string !== &#039;string&#039;) {
    return splitAtSelection(...arguments);
  }
  let nextStart = 0;
  return text.split(string).map(substring =&gt; {
    const startIndex = nextStart;
    const value = {
      formats: formats.slice(startIndex, startIndex + substring.length),
      replacements: replacements.slice(startIndex, startIndex + substring.length),
      text: substring
    };
    nextStart += string.length + substring.length;
    if (start !== undefined &amp;&amp; end !== undefined) {
      if (start &gt;= startIndex &amp;&amp; start &lt; nextStart) {
        value.start = start - startIndex;
      } else if (start &lt; startIndex &amp;&amp; end &gt; startIndex) {
        value.start = 0;
      }
      if (end &gt;= startIndex &amp;&amp; end &lt; nextStart) {
        value.end = end - startIndex;
      } else if (start &lt; nextStart &amp;&amp; end &gt; nextStart) {
        value.end = substring.length;
      }
    }
    return value;
  });
}
function splitAtSelection({
  formats,
  replacements,
  text,
  start,
  end
}, startIndex = start, endIndex = end) {
  if (start === undefined || end === undefined) {
    return;
  }
  const before = {
    formats: formats.slice(0, startIndex),
    replacements: replacements.slice(0, startIndex),
    text: text.slice(0, startIndex)
  };
  const after = {
    formats: formats.slice(endIndex),
    replacements: replacements.slice(endIndex),
    text: text.slice(endIndex),
    start: 0,
    end: 0
  };
  return [before, after];
}

;// ./node_modules/@wordpress/rich-text/build-module/is-range-equal.js
/**
 * Returns true if two ranges are equal, or false otherwise. Ranges are
 * considered equal if their start and end occur in the same container and
 * offset.
 *
 * @param {Range|null} a First range object to test.
 * @param {Range|null} b First range object to test.
 *
 * @return {boolean} Whether the two ranges are equal.
 */
function isRangeEqual(a, b) {
  return a === b || a &amp;&amp; b &amp;&amp; a.startContainer === b.startContainer &amp;&amp; a.startOffset === b.startOffset &amp;&amp; a.endContainer === b.endContainer &amp;&amp; a.endOffset === b.endOffset;
}

;// ./node_modules/@wordpress/rich-text/build-module/to-dom.js
/**
 * Internal dependencies
 */





/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Creates a path as an array of indices from the given root node to the given
 * node.
 *
 * @param {Node}        node     Node to find the path of.
 * @param {HTMLElement} rootNode Root node to find the path from.
 * @param {Array}       path     Initial path to build on.
 *
 * @return {Array} The path from the root node to the node.
 */
function createPathToNode(node, rootNode, path) {
  const parentNode = node.parentNode;
  let i = 0;
  while (node = node.previousSibling) {
    i++;
  }
  path = [i, ...path];
  if (parentNode !== rootNode) {
    path = createPathToNode(parentNode, rootNode, path);
  }
  return path;
}

/**
 * Gets a node given a path (array of indices) from the given node.
 *
 * @param {HTMLElement} node Root node to find the wanted node in.
 * @param {Array}       path Path (indices) to the wanted node.
 *
 * @return {Object} Object with the found node and the remaining offset (if any).
 */
function getNodeByPath(node, path) {
  path = [...path];
  while (node &amp;&amp; path.length &gt; 1) {
    node = node.childNodes[path.shift()];
  }
  return {
    node,
    offset: path[0]
  };
}
function to_dom_append(element, child) {
  if (child.html !== undefined) {
    return element.innerHTML += child.html;
  }
  if (typeof child === &#039;string&#039;) {
    child = element.ownerDocument.createTextNode(child);
  }
  const {
    type,
    attributes
  } = child;
  if (type) {
    if (type === &#039;#comment&#039;) {
      child = element.ownerDocument.createComment(attributes[&#039;data-rich-text-comment&#039;]);
    } else {
      child = element.ownerDocument.createElement(type);
      for (const key in attributes) {
        child.setAttribute(key, attributes[key]);
      }
    }
  }
  return element.appendChild(child);
}
function to_dom_appendText(node, text) {
  node.appendData(text);
}
function to_dom_getLastChild({
  lastChild
}) {
  return lastChild;
}
function to_dom_getParent({
  parentNode
}) {
  return parentNode;
}
function to_dom_isText(node) {
  return node.nodeType === node.TEXT_NODE;
}
function to_dom_getText({
  nodeValue
}) {
  return nodeValue;
}
function to_dom_remove(node) {
  return node.parentNode.removeChild(node);
}
function toDom({
  value,
  prepareEditableTree,
  isEditableTree = true,
  placeholder,
  doc = document
}) {
  let startPath = [];
  let endPath = [];
  if (prepareEditableTree) {
    value = {
      ...value,
      formats: prepareEditableTree(value)
    };
  }

  /**
   * Returns a new instance of a DOM tree upon which RichText operations can be
   * applied.
   *
   * Note: The current implementation will return a shared reference, reset on
   * each call to `createEmpty`. Therefore, you should not hold a reference to
   * the value to operate upon asynchronously, as it may have unexpected results.
   *
   * @return {Object} RichText tree.
   */
  const createEmpty = () =&gt; createElement(doc, &#039;&#039;);
  const tree = toTree({
    value,
    createEmpty,
    append: to_dom_append,
    getLastChild: to_dom_getLastChild,
    getParent: to_dom_getParent,
    isText: to_dom_isText,
    getText: to_dom_getText,
    remove: to_dom_remove,
    appendText: to_dom_appendText,
    onStartIndex(body, pointer) {
      startPath = createPathToNode(pointer, body, [pointer.nodeValue.length]);
    },
    onEndIndex(body, pointer) {
      endPath = createPathToNode(pointer, body, [pointer.nodeValue.length]);
    },
    isEditableTree,
    placeholder
  });
  return {
    body: tree,
    selection: {
      startPath,
      endPath
    }
  };
}

/**
 * Create an `Element` tree from a Rich Text value and applies the difference to
 * the `Element` tree contained by `current`.
 *
 * @param {Object}        $1                       Named arguments.
 * @param {RichTextValue} $1.value                 Value to apply.
 * @param {HTMLElement}   $1.current               The live root node to apply the element tree to.
 * @param {Function}      [$1.prepareEditableTree] Function to filter editorable formats.
 * @param {boolean}       [$1.__unstableDomOnly]   Only apply elements, no selection.
 * @param {string}        [$1.placeholder]         Placeholder text.
 */
function apply({
  value,
  current,
  prepareEditableTree,
  __unstableDomOnly,
  placeholder
}) {
  // Construct a new element tree in memory.
  const {
    body,
    selection
  } = toDom({
    value,
    prepareEditableTree,
    placeholder,
    doc: current.ownerDocument
  });
  applyValue(body, current);
  if (value.start !== undefined &amp;&amp; !__unstableDomOnly) {
    applySelection(selection, current);
  }
}
function applyValue(future, current) {
  let i = 0;
  let futureChild;
  while (futureChild = future.firstChild) {
    const currentChild = current.childNodes[i];
    if (!currentChild) {
      current.appendChild(futureChild);
    } else if (!currentChild.isEqualNode(futureChild)) {
      if (currentChild.nodeName !== futureChild.nodeName || currentChild.nodeType === currentChild.TEXT_NODE &amp;&amp; currentChild.data !== futureChild.data) {
        current.replaceChild(futureChild, currentChild);
      } else {
        const currentAttributes = currentChild.attributes;
        const futureAttributes = futureChild.attributes;
        if (currentAttributes) {
          let ii = currentAttributes.length;

          // Reverse loop because `removeAttribute` on `currentChild`
          // changes `currentAttributes`.
          while (ii--) {
            const {
              name
            } = currentAttributes[ii];
            if (!futureChild.getAttribute(name)) {
              currentChild.removeAttribute(name);
            }
          }
        }
        if (futureAttributes) {
          for (let ii = 0; ii &lt; futureAttributes.length; ii++) {
            const {
              name,
              value
            } = futureAttributes[ii];
            if (currentChild.getAttribute(name) !== value) {
              currentChild.setAttribute(name, value);
            }
          }
        }
        applyValue(futureChild, currentChild);
        future.removeChild(futureChild);
      }
    } else {
      future.removeChild(futureChild);
    }
    i++;
  }
  while (current.childNodes[i]) {
    current.removeChild(current.childNodes[i]);
  }
}
function applySelection({
  startPath,
  endPath
}, current) {
  const {
    node: startContainer,
    offset: startOffset
  } = getNodeByPath(current, startPath);
  const {
    node: endContainer,
    offset: endOffset
  } = getNodeByPath(current, endPath);
  const {
    ownerDocument
  } = current;
  const {
    defaultView
  } = ownerDocument;
  const selection = defaultView.getSelection();
  const range = ownerDocument.createRange();
  range.setStart(startContainer, startOffset);
  range.setEnd(endContainer, endOffset);
  const {
    activeElement
  } = ownerDocument;
  if (selection.rangeCount &gt; 0) {
    // If the to be added range and the live range are the same, there&#039;s no
    // need to remove the live range and add the equivalent range.
    if (isRangeEqual(range, selection.getRangeAt(0))) {
      return;
    }
    selection.removeAllRanges();
  }
  selection.addRange(range);

  // This function is not intended to cause a shift in focus. Since the above
  // selection manipulations may shift focus, ensure that focus is restored to
  // its previous state.
  if (activeElement !== ownerDocument.activeElement) {
    // The `instanceof` checks protect against edge cases where the focused
    // element is not of the interface HTMLElement (does not have a `focus`
    // or `blur` property).
    //
    // See: https://github.com/Microsoft/TypeScript/issues/5901#issuecomment-431649653
    if (activeElement instanceof defaultView.HTMLElement) {
      activeElement.focus();
    }
  }
}

;// external [&quot;wp&quot;,&quot;a11y&quot;]
const external_wp_a11y_namespaceObject = window[&quot;wp&quot;][&quot;a11y&quot;];
;// external [&quot;wp&quot;,&quot;i18n&quot;]
const external_wp_i18n_namespaceObject = window[&quot;wp&quot;][&quot;i18n&quot;];
;// ./node_modules/@wordpress/rich-text/build-module/toggle-format.js
/**
 * WordPress dependencies
 */




/**
 * Internal dependencies
 */





/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */
/** @typedef {import(&#039;./types&#039;).RichTextFormat} RichTextFormat */

/**
 * Toggles a format object to a Rich Text value at the current selection.
 *
 * @param {RichTextValue}  value  Value to modify.
 * @param {RichTextFormat} format Format to apply or remove.
 *
 * @return {RichTextValue} A new value with the format applied or removed.
 */
function toggleFormat(value, format) {
  if (getActiveFormat(value, format.type)) {
    // For screen readers, will announce if formatting control is disabled.
    if (format.title) {
      // translators: %s: title of the formatting control
      (0,external_wp_a11y_namespaceObject.speak)((0,external_wp_i18n_namespaceObject.sprintf)((0,external_wp_i18n_namespaceObject.__)(&#039;%s removed.&#039;), format.title), &#039;assertive&#039;);
    }
    return removeFormat(value, format.type);
  }
  // For screen readers, will announce if formatting control is enabled.
  if (format.title) {
    // translators: %s: title of the formatting control
    (0,external_wp_a11y_namespaceObject.speak)((0,external_wp_i18n_namespaceObject.sprintf)((0,external_wp_i18n_namespaceObject.__)(&#039;%s applied.&#039;), format.title), &#039;assertive&#039;);
  }
  return applyFormat(value, format);
}

;// ./node_modules/@wordpress/rich-text/build-module/unregister-format-type.js
/**
 * WordPress dependencies
 */


/**
 * Internal dependencies
 */


/** @typedef {import(&#039;./register-format-type&#039;).WPFormat} WPFormat */

/**
 * Unregisters a format.
 *
 * @param {string} name Format name.
 *
 * @return {WPFormat|undefined} The previous format value, if it has
 *                                        been successfully unregistered;
 *                                        otherwise `undefined`.
 */
function unregisterFormatType(name) {
  const oldFormat = (0,external_wp_data_namespaceObject.select)(store).getFormatType(name);
  if (!oldFormat) {
    window.console.error(`Format ${name} is not registered.`);
    return;
  }
  (0,external_wp_data_namespaceObject.dispatch)(store).removeFormatTypes(name);
  return oldFormat;
}

;// external [&quot;wp&quot;,&quot;element&quot;]
const external_wp_element_namespaceObject = window[&quot;wp&quot;][&quot;element&quot;];
;// external [&quot;wp&quot;,&quot;deprecated&quot;]
const external_wp_deprecated_namespaceObject = window[&quot;wp&quot;][&quot;deprecated&quot;];
var external_wp_deprecated_default = /*#__PURE__*/__webpack_require__.n(external_wp_deprecated_namespaceObject);
;// ./node_modules/@wordpress/rich-text/build-module/component/use-anchor-ref.js
/**
 * WordPress dependencies
 */



/**
 * Internal dependencies
 */


/**
 * @template T
 * @typedef {import(&#039;@wordpress/element&#039;).RefObject&lt;T&gt;} RefObject&lt;T&gt;
 */
/** @typedef {import(&#039;../register-format-type&#039;).WPFormat} WPFormat */
/** @typedef {import(&#039;../types&#039;).RichTextValue} RichTextValue */

/**
 * This hook, to be used in a format type&#039;s Edit component, returns the active
 * element that is formatted, or the selection range if no format is active.
 * The returned value is meant to be used for positioning UI, e.g. by passing it
 * to the `Popover` component.
 *
 * @param {Object}                 $1          Named parameters.
 * @param {RefObject&lt;HTMLElement&gt;} $1.ref      React ref of the element
 *                                             containing  the editable content.
 * @param {RichTextValue}          $1.value    Value to check for selection.
 * @param {WPFormat}               $1.settings The format type&#039;s settings.
 *
 * @return {Element|Range} The active element or selection range.
 */
function useAnchorRef({
  ref,
  value,
  settings = {}
}) {
  external_wp_deprecated_default()(&#039;`useAnchorRef` hook&#039;, {
    since: &#039;6.1&#039;,
    alternative: &#039;`useAnchor` hook&#039;
  });
  const {
    tagName,
    className,
    name
  } = settings;
  const activeFormat = name ? getActiveFormat(value, name) : undefined;
  return (0,external_wp_element_namespaceObject.useMemo)(() =&gt; {
    if (!ref.current) {
      return;
    }
    const {
      ownerDocument: {
        defaultView
      }
    } = ref.current;
    const selection = defaultView.getSelection();
    if (!selection.rangeCount) {
      return;
    }
    const range = selection.getRangeAt(0);
    if (!activeFormat) {
      return range;
    }
    let element = range.startContainer;

    // If the caret is right before the element, select the next element.
    element = element.nextElementSibling || element;
    while (element.nodeType !== element.ELEMENT_NODE) {
      element = element.parentNode;
    }
    return element.closest(tagName + (className ? &#039;.&#039; + className : &#039;&#039;));
  }, [activeFormat, value.start, value.end, tagName, className]);
}

;// external [&quot;wp&quot;,&quot;compose&quot;]
const external_wp_compose_namespaceObject = window[&quot;wp&quot;][&quot;compose&quot;];
;// ./node_modules/@wordpress/rich-text/build-module/component/use-anchor.js
/**
 * WordPress dependencies
 */



/** @typedef {import(&#039;../register-format-type&#039;).WPFormat} WPFormat */
/** @typedef {import(&#039;../types&#039;).RichTextValue} RichTextValue */

/**
 * Given a range and a format tag name and class name, returns the closest
 * format element.
 *
 * @param {Range}       range                  The Range to check.
 * @param {HTMLElement} editableContentElement The editable wrapper.
 * @param {string}      tagName                The tag name of the format element.
 * @param {string}      className              The class name of the format element.
 *
 * @return {HTMLElement|undefined} The format element, if found.
 */
function getFormatElement(range, editableContentElement, tagName, className) {
  let element = range.startContainer;

  // Even if the active format is defined, the actually DOM range&#039;s start
  // container may be outside of the format&#039;s DOM element:
  // `a‸&lt;strong&gt;b&lt;/strong&gt;` (DOM) while visually it&#039;s `a&lt;strong&gt;‸b&lt;/strong&gt;`.
  // So at a given selection index, start with the deepest format DOM element.
  if (element.nodeType === element.TEXT_NODE &amp;&amp; range.startOffset === element.length &amp;&amp; element.nextSibling) {
    element = element.nextSibling;
    while (element.firstChild) {
      element = element.firstChild;
    }
  }
  if (element.nodeType !== element.ELEMENT_NODE) {
    element = element.parentElement;
  }
  if (!element) {
    return;
  }
  if (element === editableContentElement) {
    return;
  }
  if (!editableContentElement.contains(element)) {
    return;
  }
  const selector = tagName + (className ? &#039;.&#039; + className : &#039;&#039;);

  // .closest( selector ), but with a boundary. Check if the element matches
  // the selector. If it doesn&#039;t match, try the parent element if it&#039;s not the
  // editable wrapper. We don&#039;t want to try to match ancestors of the editable
  // wrapper, which is what .closest( selector ) would do. When the element is
  // the editable wrapper (which is most likely the case because most text is
  // unformatted), this never runs.
  while (element !== editableContentElement) {
    if (element.matches(selector)) {
      return element;
    }
    element = element.parentElement;
  }
}

/**
 * @typedef {Object} VirtualAnchorElement
 * @property {() =&gt; DOMRect} getBoundingClientRect A function returning a DOMRect
 * @property {HTMLElement}   contextElement        The actual DOM element
 */

/**
 * Creates a virtual anchor element for a range.
 *
 * @param {Range}       range                  The range to create a virtual anchor element for.
 * @param {HTMLElement} editableContentElement The editable wrapper.
 *
 * @return {VirtualAnchorElement} The virtual anchor element.
 */
function createVirtualAnchorElement(range, editableContentElement) {
  return {
    contextElement: editableContentElement,
    getBoundingClientRect() {
      return editableContentElement.contains(range.startContainer) ? range.getBoundingClientRect() : editableContentElement.getBoundingClientRect();
    }
  };
}

/**
 * Get the anchor: a format element if there is a matching one based on the
 * tagName and className or a range otherwise.
 *
 * @param {HTMLElement} editableContentElement The editable wrapper.
 * @param {string}      tagName                The tag name of the format
 *                                             element.
 * @param {string}      className              The class name of the format
 *                                             element.
 *
 * @return {HTMLElement|VirtualAnchorElement|undefined} The anchor.
 */
function getAnchor(editableContentElement, tagName, className) {
  if (!editableContentElement) {
    return;
  }
  const {
    ownerDocument
  } = editableContentElement;
  const {
    defaultView
  } = ownerDocument;
  const selection = defaultView.getSelection();
  if (!selection) {
    return;
  }
  if (!selection.rangeCount) {
    return;
  }
  const range = selection.getRangeAt(0);
  if (!range || !range.startContainer) {
    return;
  }
  const formatElement = getFormatElement(range, editableContentElement, tagName, className);
  if (formatElement) {
    return formatElement;
  }
  return createVirtualAnchorElement(range, editableContentElement);
}

/**
 * This hook, to be used in a format type&#039;s Edit component, returns the active
 * element that is formatted, or a virtual element for the selection range if
 * no format is active. The returned value is meant to be used for positioning
 * UI, e.g. by passing it to the `Popover` component via the `anchor` prop.
 *
 * @param {Object}           $1                        Named parameters.
 * @param {HTMLElement|null} $1.editableContentElement The element containing
 *                                                     the editable content.
 * @param {WPFormat=}        $1.settings               The format type&#039;s settings.
 * @return {Element|VirtualAnchorElement|undefined|null} The active element or selection range.
 */
function useAnchor({
  editableContentElement,
  settings = {}
}) {
  const {
    tagName,
    className,
    isActive
  } = settings;
  const [anchor, setAnchor] = (0,external_wp_element_namespaceObject.useState)(() =&gt; getAnchor(editableContentElement, tagName, className));
  const wasActive = (0,external_wp_compose_namespaceObject.usePrevious)(isActive);
  (0,external_wp_element_namespaceObject.useLayoutEffect)(() =&gt; {
    if (!editableContentElement) {
      return;
    }
    function callback() {
      setAnchor(getAnchor(editableContentElement, tagName, className));
    }
    function attach() {
      ownerDocument.addEventListener(&#039;selectionchange&#039;, callback);
    }
    function detach() {
      ownerDocument.removeEventListener(&#039;selectionchange&#039;, callback);
    }
    const {
      ownerDocument
    } = editableContentElement;
    if (editableContentElement === ownerDocument.activeElement ||
    // When a link is created, we need to attach the popover to the newly created anchor.
    !wasActive &amp;&amp; isActive ||
    // Sometimes we&#039;re _removing_ an active anchor, such as the inline color popover.
    // When we add the color, it switches from a virtual anchor to a `&lt;mark&gt;` element.
    // When we _remove_ the color, it switches from a `&lt;mark&gt;` element to a virtual anchor.
    wasActive &amp;&amp; !isActive) {
      setAnchor(getAnchor(editableContentElement, tagName, className));
      attach();
    }
    editableContentElement.addEventListener(&#039;focusin&#039;, attach);
    editableContentElement.addEventListener(&#039;focusout&#039;, detach);
    return () =&gt; {
      detach();
      editableContentElement.removeEventListener(&#039;focusin&#039;, attach);
      editableContentElement.removeEventListener(&#039;focusout&#039;, detach);
    };
  }, [editableContentElement, tagName, className, isActive, wasActive]);
  return anchor;
}

;// ./node_modules/@wordpress/rich-text/build-module/component/use-default-style.js
/**
 * WordPress dependencies
 */


/**
 * In HTML, leading and trailing spaces are not visible, and multiple spaces
 * elsewhere are visually reduced to one space. This rule prevents spaces from
 * collapsing so all space is visible in the editor and can be removed. It also
 * prevents some browsers from inserting non-breaking spaces at the end of a
 * line to prevent the space from visually disappearing. Sometimes these non
 * breaking spaces can linger in the editor causing unwanted non breaking spaces
 * in between words. If also prevent Firefox from inserting a trailing `br` node
 * to visualise any trailing space, causing the element to be saved.
 *
 * &gt; Authors are encouraged to set the &#039;white-space&#039; property on editing hosts
 * &gt; and on markup that was originally created through these editing mechanisms
 * &gt; to the value &#039;pre-wrap&#039;. Default HTML whitespace handling is not well
 * &gt; suited to WYSIWYG editing, and line wrapping will not work correctly in
 * &gt; some corner cases if &#039;white-space&#039; is left at its default value.
 *
 * https://html.spec.whatwg.org/multipage/interaction.html#best-practices-for-in-page-editors
 *
 * @type {string}
 */
const whiteSpace = &#039;pre-wrap&#039;;

/**
 * A minimum width of 1px will prevent the rich text container from collapsing
 * to 0 width and hiding the caret. This is useful for inline containers.
 */
const minWidth = &#039;1px&#039;;
function useDefaultStyle() {
  return (0,external_wp_element_namespaceObject.useCallback)(element =&gt; {
    if (!element) {
      return;
    }
    element.style.whiteSpace = whiteSpace;
    element.style.minWidth = minWidth;
  }, []);
}

;// ./node_modules/@wordpress/rich-text/build-module/component/use-boundary-style.js
/**
 * WordPress dependencies
 */


/*
 * Calculates and renders the format boundary style when the active formats
 * change.
 */
function useBoundaryStyle({
  record
}) {
  const ref = (0,external_wp_element_namespaceObject.useRef)();
  const {
    activeFormats = [],
    replacements,
    start
  } = record.current;
  const activeReplacement = replacements[start];
  (0,external_wp_element_namespaceObject.useEffect)(() =&gt; {
    // There&#039;s no need to recalculate the boundary styles if no formats are
    // active, because no boundary styles will be visible.
    if ((!activeFormats || !activeFormats.length) &amp;&amp; !activeReplacement) {
      return;
    }
    const boundarySelector = &#039;*[data-rich-text-format-boundary]&#039;;
    const element = ref.current.querySelector(boundarySelector);
    if (!element) {
      return;
    }
    const {
      ownerDocument
    } = element;
    const {
      defaultView
    } = ownerDocument;
    const computedStyle = defaultView.getComputedStyle(element);
    const newColor = computedStyle.color.replace(&#039;)&#039;, &#039;, 0.2)&#039;).replace(&#039;rgb&#039;, &#039;rgba&#039;);
    const selector = `.rich-text:focus ${boundarySelector}`;
    const rule = `background-color: ${newColor}`;
    const style = `${selector} {${rule}}`;
    const globalStyleId = &#039;rich-text-boundary-style&#039;;
    let globalStyle = ownerDocument.getElementById(globalStyleId);
    if (!globalStyle) {
      globalStyle = ownerDocument.createElement(&#039;style&#039;);
      globalStyle.id = globalStyleId;
      ownerDocument.head.appendChild(globalStyle);
    }
    if (globalStyle.innerHTML !== style) {
      globalStyle.innerHTML = style;
    }
  }, [activeFormats, activeReplacement]);
  return ref;
}

;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/copy-handler.js
/**
 * Internal dependencies
 */




/* harmony default export */ const copy_handler = (props =&gt; element =&gt; {
  function onCopy(event) {
    const {
      record
    } = props.current;
    const {
      ownerDocument
    } = element;
    if (isCollapsed(record.current) || !element.contains(ownerDocument.activeElement)) {
      return;
    }
    const selectedRecord = slice(record.current);
    const plainText = getTextContent(selectedRecord);
    const html = toHTMLString({
      value: selectedRecord
    });
    event.clipboardData.setData(&#039;text/plain&#039;, plainText);
    event.clipboardData.setData(&#039;text/html&#039;, html);
    event.clipboardData.setData(&#039;rich-text&#039;, &#039;true&#039;);
    event.preventDefault();
    if (event.type === &#039;cut&#039;) {
      ownerDocument.execCommand(&#039;delete&#039;);
    }
  }
  const {
    defaultView
  } = element.ownerDocument;
  defaultView.addEventListener(&#039;copy&#039;, onCopy);
  defaultView.addEventListener(&#039;cut&#039;, onCopy);
  return () =&gt; {
    defaultView.removeEventListener(&#039;copy&#039;, onCopy);
    defaultView.removeEventListener(&#039;cut&#039;, onCopy);
  };
});

;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/select-object.js
/* harmony default export */ const select_object = (() =&gt; element =&gt; {
  function onClick(event) {
    const {
      target
    } = event;

    // If the child element has no text content, it must be an object.
    if (target === element || target.textContent &amp;&amp; target.isContentEditable) {
      return;
    }
    const {
      ownerDocument
    } = target;
    const {
      defaultView
    } = ownerDocument;
    const selection = defaultView.getSelection();

    // If it&#039;s already selected, do nothing and let default behavior happen.
    // This means it&#039;s &quot;click-through&quot;.
    if (selection.containsNode(target)) {
      return;
    }
    const range = ownerDocument.createRange();
    // If the target is within a non editable element, select the non
    // editable element.
    const nodeToSelect = target.isContentEditable ? target : target.closest(&#039;[contenteditable]&#039;);
    range.selectNode(nodeToSelect);
    selection.removeAllRanges();
    selection.addRange(range);
    event.preventDefault();
  }
  function onFocusIn(event) {
    // When there is incoming focus from a link, select the object.
    if (event.relatedTarget &amp;&amp; !element.contains(event.relatedTarget) &amp;&amp; event.relatedTarget.tagName === &#039;A&#039;) {
      onClick(event);
    }
  }
  element.addEventListener(&#039;click&#039;, onClick);
  element.addEventListener(&#039;focusin&#039;, onFocusIn);
  return () =&gt; {
    element.removeEventListener(&#039;click&#039;, onClick);
    element.removeEventListener(&#039;focusin&#039;, onFocusIn);
  };
});

;// external [&quot;wp&quot;,&quot;keycodes&quot;]
const external_wp_keycodes_namespaceObject = window[&quot;wp&quot;][&quot;keycodes&quot;];
;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/format-boundaries.js
/**
 * WordPress dependencies
 */


/**
 * Internal dependencies
 */

const EMPTY_ACTIVE_FORMATS = [];
/* harmony default export */ const format_boundaries = (props =&gt; element =&gt; {
  function onKeyDown(event) {
    const {
      keyCode,
      shiftKey,
      altKey,
      metaKey,
      ctrlKey
    } = event;
    if (
    // Only override left and right keys without modifiers pressed.
    shiftKey || altKey || metaKey || ctrlKey || keyCode !== external_wp_keycodes_namespaceObject.LEFT &amp;&amp; keyCode !== external_wp_keycodes_namespaceObject.RIGHT) {
      return;
    }
    const {
      record,
      applyRecord,
      forceRender
    } = props.current;
    const {
      text,
      formats,
      start,
      end,
      activeFormats: currentActiveFormats = []
    } = record.current;
    const collapsed = isCollapsed(record.current);
    const {
      ownerDocument
    } = element;
    const {
      defaultView
    } = ownerDocument;
    // To do: ideally, we should look at visual position instead.
    const {
      direction
    } = defaultView.getComputedStyle(element);
    const reverseKey = direction === &#039;rtl&#039; ? external_wp_keycodes_namespaceObject.RIGHT : external_wp_keycodes_namespaceObject.LEFT;
    const isReverse = event.keyCode === reverseKey;

    // If the selection is collapsed and at the very start, do nothing if
    // navigating backward.
    // If the selection is collapsed and at the very end, do nothing if
    // navigating forward.
    if (collapsed &amp;&amp; currentActiveFormats.length === 0) {
      if (start === 0 &amp;&amp; isReverse) {
        return;
      }
      if (end === text.length &amp;&amp; !isReverse) {
        return;
      }
    }

    // If the selection is not collapsed, let the browser handle collapsing
    // the selection for now. Later we could expand this logic to set
    // boundary positions if needed.
    if (!collapsed) {
      return;
    }
    const formatsBefore = formats[start - 1] || EMPTY_ACTIVE_FORMATS;
    const formatsAfter = formats[start] || EMPTY_ACTIVE_FORMATS;
    const destination = isReverse ? formatsBefore : formatsAfter;
    const isIncreasing = currentActiveFormats.every((format, index) =&gt; format === destination[index]);
    let newActiveFormatsLength = currentActiveFormats.length;
    if (!isIncreasing) {
      newActiveFormatsLength--;
    } else if (newActiveFormatsLength &lt; destination.length) {
      newActiveFormatsLength++;
    }
    if (newActiveFormatsLength === currentActiveFormats.length) {
      record.current._newActiveFormats = destination;
      return;
    }
    event.preventDefault();
    const origin = isReverse ? formatsAfter : formatsBefore;
    const source = isIncreasing ? destination : origin;
    const newActiveFormats = source.slice(0, newActiveFormatsLength);
    const newValue = {
      ...record.current,
      activeFormats: newActiveFormats
    };
    record.current = newValue;
    applyRecord(newValue);
    forceRender();
  }
  element.addEventListener(&#039;keydown&#039;, onKeyDown);
  return () =&gt; {
    element.removeEventListener(&#039;keydown&#039;, onKeyDown);
  };
});

;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/delete.js
/**
 * WordPress dependencies
 */


/**
 * Internal dependencies
 */

/* harmony default export */ const event_listeners_delete = (props =&gt; element =&gt; {
  function onKeyDown(event) {
    const {
      keyCode
    } = event;
    const {
      createRecord,
      handleChange
    } = props.current;
    if (event.defaultPrevented) {
      return;
    }
    if (keyCode !== external_wp_keycodes_namespaceObject.DELETE &amp;&amp; keyCode !== external_wp_keycodes_namespaceObject.BACKSPACE) {
      return;
    }
    const currentValue = createRecord();
    const {
      start,
      end,
      text
    } = currentValue;

    // Always handle full content deletion ourselves.
    if (start === 0 &amp;&amp; end !== 0 &amp;&amp; end === text.length) {
      handleChange(remove_remove(currentValue));
      event.preventDefault();
    }
  }
  element.addEventListener(&#039;keydown&#039;, onKeyDown);
  return () =&gt; {
    element.removeEventListener(&#039;keydown&#039;, onKeyDown);
  };
});

;// ./node_modules/@wordpress/rich-text/build-module/update-formats.js
/**
 * Internal dependencies
 */



/** @typedef {import(&#039;./types&#039;).RichTextValue} RichTextValue */

/**
 * Efficiently updates all the formats from `start` (including) until `end`
 * (excluding) with the active formats. Mutates `value`.
 *
 * @param {Object}        $1         Named paramentes.
 * @param {RichTextValue} $1.value   Value te update.
 * @param {number}        $1.start   Index to update from.
 * @param {number}        $1.end     Index to update until.
 * @param {Array}         $1.formats Replacement formats.
 *
 * @return {RichTextValue} Mutated value.
 */
function updateFormats({
  value,
  start,
  end,
  formats
}) {
  // Start and end may be switched in case of delete.
  const min = Math.min(start, end);
  const max = Math.max(start, end);
  const formatsBefore = value.formats[min - 1] || [];
  const formatsAfter = value.formats[max] || [];

  // First, fix the references. If any format right before or after are
  // equal, the replacement format should use the same reference.
  value.activeFormats = formats.map((format, index) =&gt; {
    if (formatsBefore[index]) {
      if (isFormatEqual(format, formatsBefore[index])) {
        return formatsBefore[index];
      }
    } else if (formatsAfter[index]) {
      if (isFormatEqual(format, formatsAfter[index])) {
        return formatsAfter[index];
      }
    }
    return format;
  });
  while (--end &gt;= start) {
    if (value.activeFormats.length &gt; 0) {
      value.formats[end] = value.activeFormats;
    } else {
      delete value.formats[end];
    }
  }
  return value;
}

;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/input-and-selection.js
/**
 * Internal dependencies
 */



/**
 * All inserting input types that would insert HTML into the DOM.
 *
 * @see https://www.w3.org/TR/input-events-2/#interface-InputEvent-Attributes
 *
 * @type {Set}
 */
const INSERTION_INPUT_TYPES_TO_IGNORE = new Set([&#039;insertParagraph&#039;, &#039;insertOrderedList&#039;, &#039;insertUnorderedList&#039;, &#039;insertHorizontalRule&#039;, &#039;insertLink&#039;]);
const input_and_selection_EMPTY_ACTIVE_FORMATS = [];
const PLACEHOLDER_ATTR_NAME = &#039;data-rich-text-placeholder&#039;;

/**
 * If the selection is set on the placeholder element, collapse the selection to
 * the start (before the placeholder).
 *
 * @param {Window} defaultView
 */
function fixPlaceholderSelection(defaultView) {
  const selection = defaultView.getSelection();
  const {
    anchorNode,
    anchorOffset
  } = selection;
  if (anchorNode.nodeType !== anchorNode.ELEMENT_NODE) {
    return;
  }
  const targetNode = anchorNode.childNodes[anchorOffset];
  if (!targetNode || targetNode.nodeType !== targetNode.ELEMENT_NODE || !targetNode.hasAttribute(PLACEHOLDER_ATTR_NAME)) {
    return;
  }
  selection.collapseToStart();
}
/* harmony default export */ const input_and_selection = (props =&gt; element =&gt; {
  const {
    ownerDocument
  } = element;
  const {
    defaultView
  } = ownerDocument;
  let isComposing = false;
  function onInput(event) {
    // Do not trigger a change if characters are being composed. Browsers
    // will usually emit a final `input` event when the characters are
    // composed. As of December 2019, Safari doesn&#039;t support
    // nativeEvent.isComposing.
    if (isComposing) {
      return;
    }
    let inputType;
    if (event) {
      inputType = event.inputType;
    }
    const {
      record,
      applyRecord,
      createRecord,
      handleChange
    } = props.current;

    // The browser formatted something or tried to insert HTML. Overwrite
    // it. It will be handled later by the format library if needed.
    if (inputType &amp;&amp; (inputType.indexOf(&#039;format&#039;) === 0 || INSERTION_INPUT_TYPES_TO_IGNORE.has(inputType))) {
      applyRecord(record.current);
      return;
    }
    const currentValue = createRecord();
    const {
      start,
      activeFormats: oldActiveFormats = []
    } = record.current;

    // Update the formats between the last and new caret position.
    const change = updateFormats({
      value: currentValue,
      start,
      end: currentValue.start,
      formats: oldActiveFormats
    });
    handleChange(change);
  }

  /**
   * Syncs the selection to local state. A callback for the `selectionchange`
   * event.
   */
  function handleSelectionChange() {
    const {
      record,
      applyRecord,
      createRecord,
      onSelectionChange
    } = props.current;

    // Check if the implementor disabled editing. `contentEditable` does
    // disable input, but not text selection, so we must ignore selection
    // changes.
    if (element.contentEditable !== &#039;true&#039;) {
      return;
    }

    // Ensure the active element is the rich text element.
    if (ownerDocument.activeElement !== element) {
      // If it is not, we can stop listening for selection changes. We
      // resume listening when the element is focused.
      ownerDocument.removeEventListener(&#039;selectionchange&#039;, handleSelectionChange);
      return;
    }

    // In case of a keyboard event, ignore selection changes during
    // composition.
    if (isComposing) {
      return;
    }
    const {
      start,
      end,
      text
    } = createRecord();
    const oldRecord = record.current;

    // Fallback mechanism for IE11, which doesn&#039;t support the input event.
    // Any input results in a selection change.
    if (text !== oldRecord.text) {
      onInput();
      return;
    }
    if (start === oldRecord.start &amp;&amp; end === oldRecord.end) {
      // Sometimes the browser may set the selection on the placeholder
      // element, in which case the caret is not visible. We need to set
      // the caret before the placeholder if that&#039;s the case.
      if (oldRecord.text.length === 0 &amp;&amp; start === 0) {
        fixPlaceholderSelection(defaultView);
      }
      return;
    }
    const newValue = {
      ...oldRecord,
      start,
      end,
      // _newActiveFormats may be set on arrow key navigation to control
      // the right boundary position. If undefined, getActiveFormats will
      // give the active formats according to the browser.
      activeFormats: oldRecord._newActiveFormats,
      _newActiveFormats: undefined
    };
    const newActiveFormats = getActiveFormats(newValue, input_and_selection_EMPTY_ACTIVE_FORMATS);

    // Update the value with the new active formats.
    newValue.activeFormats = newActiveFormats;

    // It is important that the internal value is updated first,
    // otherwise the value will be wrong on render!
    record.current = newValue;
    applyRecord(newValue, {
      domOnly: true
    });
    onSelectionChange(start, end);
  }
  function onCompositionStart() {
    isComposing = true;
    // Do not update the selection when characters are being composed as
    // this rerenders the component and might destroy internal browser
    // editing state.
    ownerDocument.removeEventListener(&#039;selectionchange&#039;, handleSelectionChange);
    // Remove the placeholder. Since the rich text value doesn&#039;t update
    // during composition, the placeholder doesn&#039;t get removed. There&#039;s no
    // need to re-add it, when the value is updated on compositionend it
    // will be re-added when the value is empty.
    element.querySelector(`[${PLACEHOLDER_ATTR_NAME}]`)?.remove();
  }
  function onCompositionEnd() {
    isComposing = false;
    // Ensure the value is up-to-date for browsers that don&#039;t emit a final
    // input event after composition.
    onInput({
      inputType: &#039;insertText&#039;
    });
    // Tracking selection changes can be resumed.
    ownerDocument.addEventListener(&#039;selectionchange&#039;, handleSelectionChange);
  }
  function onFocus() {
    const {
      record,
      isSelected,
      onSelectionChange,
      applyRecord
    } = props.current;

    // When the whole editor is editable, let writing flow handle
    // selection.
    if (element.parentElement.closest(&#039;[contenteditable=&quot;true&quot;]&#039;)) {
      return;
    }
    if (!isSelected) {
      // We know for certain that on focus, the old selection is invalid.
      // It will be recalculated on the next mouseup, keyup, or touchend
      // event.
      const index = undefined;
      record.current = {
        ...record.current,
        start: index,
        end: index,
        activeFormats: input_and_selection_EMPTY_ACTIVE_FORMATS
      };
    } else {
      applyRecord(record.current, {
        domOnly: true
      });
    }
    onSelectionChange(record.current.start, record.current.end);

    // There is no selection change event when the element is focused, so
    // we need to manually trigger it. The selection is also not available
    // yet in this call stack.
    window.queueMicrotask(handleSelectionChange);
    ownerDocument.addEventListener(&#039;selectionchange&#039;, handleSelectionChange);
  }
  element.addEventListener(&#039;input&#039;, onInput);
  element.addEventListener(&#039;compositionstart&#039;, onCompositionStart);
  element.addEventListener(&#039;compositionend&#039;, onCompositionEnd);
  element.addEventListener(&#039;focus&#039;, onFocus);
  return () =&gt; {
    element.removeEventListener(&#039;input&#039;, onInput);
    element.removeEventListener(&#039;compositionstart&#039;, onCompositionStart);
    element.removeEventListener(&#039;compositionend&#039;, onCompositionEnd);
    element.removeEventListener(&#039;focus&#039;, onFocus);
  };
});

;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/selection-change-compat.js
/**
 * Internal dependencies
 */


/**
 * Sometimes some browsers are not firing a `selectionchange` event when
 * changing the selection by mouse or keyboard. This hook makes sure that, if we
 * detect no `selectionchange` or `input` event between the up and down events,
 * we fire a `selectionchange` event.
 */
/* harmony default export */ const selection_change_compat = (() =&gt; element =&gt; {
  const {
    ownerDocument
  } = element;
  const {
    defaultView
  } = ownerDocument;
  const selection = defaultView?.getSelection();
  let range;
  function getRange() {
    return selection.rangeCount ? selection.getRangeAt(0) : null;
  }
  function onDown(event) {
    const type = event.type === &#039;keydown&#039; ? &#039;keyup&#039; : &#039;pointerup&#039;;
    function onCancel() {
      ownerDocument.removeEventListener(type, onUp);
      ownerDocument.removeEventListener(&#039;selectionchange&#039;, onCancel);
      ownerDocument.removeEventListener(&#039;input&#039;, onCancel);
    }
    function onUp() {
      onCancel();
      if (isRangeEqual(range, getRange())) {
        return;
      }
      ownerDocument.dispatchEvent(new Event(&#039;selectionchange&#039;));
    }
    ownerDocument.addEventListener(type, onUp);
    ownerDocument.addEventListener(&#039;selectionchange&#039;, onCancel);
    ownerDocument.addEventListener(&#039;input&#039;, onCancel);
    range = getRange();
  }
  element.addEventListener(&#039;pointerdown&#039;, onDown);
  element.addEventListener(&#039;keydown&#039;, onDown);
  return () =&gt; {
    element.removeEventListener(&#039;pointerdown&#039;, onDown);
    element.removeEventListener(&#039;keydown&#039;, onDown);
  };
});

;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/prevent-focus-capture.js
/**
 * Prevents focus from being captured by the element when clicking _outside_
 * around the element. This may happen when the parent element is flex.
 * @see https://github.com/WordPress/gutenberg/pull/65857
 * @see https://github.com/WordPress/gutenberg/pull/66402
 */
function preventFocusCapture() {
  return element =&gt; {
    const {
      ownerDocument
    } = element;
    const {
      defaultView
    } = ownerDocument;
    let value = null;
    function onPointerDown(event) {
      // Abort if the event is default prevented, we will not get a pointer up event.
      if (event.defaultPrevented) {
        return;
      }
      if (event.target === element) {
        return;
      }
      if (!event.target.contains(element)) {
        return;
      }
      value = element.getAttribute(&#039;contenteditable&#039;);
      element.setAttribute(&#039;contenteditable&#039;, &#039;false&#039;);
      defaultView.getSelection().removeAllRanges();
    }
    function onPointerUp() {
      if (value !== null) {
        element.setAttribute(&#039;contenteditable&#039;, value);
        value = null;
      }
    }
    defaultView.addEventListener(&#039;pointerdown&#039;, onPointerDown);
    defaultView.addEventListener(&#039;pointerup&#039;, onPointerUp);
    return () =&gt; {
      defaultView.removeEventListener(&#039;pointerdown&#039;, onPointerDown);
      defaultView.removeEventListener(&#039;pointerup&#039;, onPointerUp);
    };
  };
}

;// ./node_modules/@wordpress/rich-text/build-module/component/event-listeners/index.js
/**
 * WordPress dependencies
 */



/**
 * Internal dependencies
 */







const allEventListeners = [copy_handler, select_object, format_boundaries, event_listeners_delete, input_and_selection, selection_change_compat, preventFocusCapture];
function useEventListeners(props) {
  const propsRef = (0,external_wp_element_namespaceObject.useRef)(props);
  (0,external_wp_element_namespaceObject.useInsertionEffect)(() =&gt; {
    propsRef.current = props;
  });
  const refEffects = (0,external_wp_element_namespaceObject.useMemo)(() =&gt; allEventListeners.map(refEffect =&gt; refEffect(propsRef)), [propsRef]);
  return (0,external_wp_compose_namespaceObject.useRefEffect)(element =&gt; {
    const cleanups = refEffects.map(effect =&gt; effect(element));
    return () =&gt; {
      cleanups.forEach(cleanup =&gt; cleanup());
    };
  }, [refEffects]);
}

;// ./node_modules/@wordpress/rich-text/build-module/component/index.js
/**
 * WordPress dependencies
 */




/**
 * Internal dependencies
 */






function useRichText({
  value = &#039;&#039;,
  selectionStart,
  selectionEnd,
  placeholder,
  onSelectionChange,
  preserveWhiteSpace,
  onChange,
  __unstableDisableFormats: disableFormats,
  __unstableIsSelected: isSelected,
  __unstableDependencies = [],
  __unstableAfterParse,
  __unstableBeforeSerialize,
  __unstableAddInvisibleFormats
}) {
  const registry = (0,external_wp_data_namespaceObject.useRegistry)();
  const [, forceRender] = (0,external_wp_element_namespaceObject.useReducer)(() =&gt; ({}));
  const ref = (0,external_wp_element_namespaceObject.useRef)();
  function createRecord() {
    const {
      ownerDocument: {
        defaultView
      }
    } = ref.current;
    const selection = defaultView.getSelection();
    const range = selection.rangeCount &gt; 0 ? selection.getRangeAt(0) : null;
    return create({
      element: ref.current,
      range,
      __unstableIsEditableTree: true
    });
  }
  function applyRecord(newRecord, {
    domOnly
  } = {}) {
    apply({
      value: newRecord,
      current: ref.current,
      prepareEditableTree: __unstableAddInvisibleFormats,
      __unstableDomOnly: domOnly,
      placeholder
    });
  }

  // Internal values are updated synchronously, unlike props and state.
  const _valueRef = (0,external_wp_element_namespaceObject.useRef)(value);
  const recordRef = (0,external_wp_element_namespaceObject.useRef)();
  function setRecordFromProps() {
    _valueRef.current = value;
    recordRef.current = value;
    if (!(value instanceof RichTextData)) {
      recordRef.current = value ? RichTextData.fromHTMLString(value, {
        preserveWhiteSpace
      }) : RichTextData.empty();
    }
    // To do: make rich text internally work with RichTextData.
    recordRef.current = {
      text: recordRef.current.text,
      formats: recordRef.current.formats,
      replacements: recordRef.current.replacements
    };
    if (disableFormats) {
      recordRef.current.formats = Array(value.length);
      recordRef.current.replacements = Array(value.length);
    }
    if (__unstableAfterParse) {
      recordRef.current.formats = __unstableAfterParse(recordRef.current);
    }
    recordRef.current.start = selectionStart;
    recordRef.current.end = selectionEnd;
  }
  const hadSelectionUpdateRef = (0,external_wp_element_namespaceObject.useRef)(false);
  if (!recordRef.current) {
    hadSelectionUpdateRef.current = isSelected;
    setRecordFromProps();
  } else if (selectionStart !== recordRef.current.start || selectionEnd !== recordRef.current.end) {
    hadSelectionUpdateRef.current = isSelected;
    recordRef.current = {
      ...recordRef.current,
      start: selectionStart,
      end: selectionEnd,
      activeFormats: undefined
    };
  }

  /**
   * Sync the value to global state. The node tree and selection will also be
   * updated if differences are found.
   *
   * @param {Object} newRecord The record to sync and apply.
   */
  function handleChange(newRecord) {
    recordRef.current = newRecord;
    applyRecord(newRecord);
    if (disableFormats) {
      _valueRef.current = newRecord.text;
    } else {
      const newFormats = __unstableBeforeSerialize ? __unstableBeforeSerialize(newRecord) : newRecord.formats;
      newRecord = {
        ...newRecord,
        formats: newFormats
      };
      if (typeof value === &#039;string&#039;) {
        _valueRef.current = toHTMLString({
          value: newRecord,
          preserveWhiteSpace
        });
      } else {
        _valueRef.current = new RichTextData(newRecord);
      }
    }
    const {
      start,
      end,
      formats,
      text
    } = recordRef.current;

    // Selection must be updated first, so it is recorded in history when
    // the content change happens.
    // We batch both calls to only attempt to rerender once.
    registry.batch(() =&gt; {
      onSelectionChange(start, end);
      onChange(_valueRef.current, {
        __unstableFormats: formats,
        __unstableText: text
      });
    });
    forceRender();
  }
  function applyFromProps() {
    setRecordFromProps();
    applyRecord(recordRef.current);
  }
  const didMountRef = (0,external_wp_element_namespaceObject.useRef)(false);

  // Value updates must happen synchronously to avoid overwriting newer values.
  (0,external_wp_element_namespaceObject.useLayoutEffect)(() =&gt; {
    if (didMountRef.current &amp;&amp; value !== _valueRef.current) {
      applyFromProps();
      forceRender();
    }
  }, [value]);

  // Value updates must happen synchronously to avoid overwriting newer values.
  (0,external_wp_element_namespaceObject.useLayoutEffect)(() =&gt; {
    if (!hadSelectionUpdateRef.current) {
      return;
    }
    if (ref.current.ownerDocument.activeElement !== ref.current) {
      ref.current.focus();
    }
    applyRecord(recordRef.current);
    hadSelectionUpdateRef.current = false;
  }, [hadSelectionUpdateRef.current]);
  const mergedRefs = (0,external_wp_compose_namespaceObject.useMergeRefs)([ref, useDefaultStyle(), useBoundaryStyle({
    record: recordRef
  }), useEventListeners({
    record: recordRef,
    handleChange,
    applyRecord,
    createRecord,
    isSelected,
    onSelectionChange,
    forceRender
  }), (0,external_wp_compose_namespaceObject.useRefEffect)(() =&gt; {
    applyFromProps();
    didMountRef.current = true;
  }, [placeholder, ...__unstableDependencies])]);
  return {
    value: recordRef.current,
    // A function to get the most recent value so event handlers in
    // useRichText implementations have access to it. For example when
    // listening to input events, we internally update the state, but this
    // state is not yet available to the input event handler because React
    // may re-render asynchronously.
    getValue: () =&gt; recordRef.current,
    onChange: handleChange,
    ref: mergedRefs
  };
}
function __experimentalRichText() {}

;// ./node_modules/@wordpress/rich-text/build-module/index.js




























/**
 * An object which represents a formatted string. See main `@wordpress/rich-text`
 * documentation for more information.
 */

(window.wp = window.wp || {}).richText = __webpack_exports__;
/******/ })()
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