this["wp"] = this["wp"] || {}; this["wp"]["dom"] =
/******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};
/******/
/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {
/******/
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/******/ 			return installedModules[moduleId].exports;
/******/ 		}
/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			i: moduleId,
/******/ 			l: false,
/******/ 			exports: {}
/******/ 		};
/******/
/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/
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/******/ 		module.l = true;
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/******/ 		// Return the exports of the module
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/******/ 	}
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/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;
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/******/ 	__webpack_require__.d = function(exports, name, getter) {
/******/ 		if(!__webpack_require__.o(exports, name)) {
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/******/ 		}
/******/ 	};
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/******/ 	__webpack_require__.r = function(exports) {
/******/ 		if(typeof Symbol !== 'undefined' && Symbol.toStringTag) {
/******/ 			Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
/******/ 		}
/******/ 		Object.defineProperty(exports, '__esModule', { value: true });
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/******/ 	// mode & 1: value is a module id, require it
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/******/ 	// mode & 8|1: behave like require
/******/ 	__webpack_require__.t = function(value, mode) {
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/******/ 		if((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;
/******/ 		var ns = Object.create(null);
/******/ 		__webpack_require__.r(ns);
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/******/ 		if(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));
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/******/ 	__webpack_require__.n = function(module) {
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/******/ 			function getDefault() { return module['default']; } :
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/******/ 		__webpack_require__.d(getter, 'a', getter);
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/******/ ({

/***/ 15:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";

// EXPORTS
__webpack_require__.d(__webpack_exports__, "a", function() { return /* binding */ _toConsumableArray; });

// EXTERNAL MODULE: ./node_modules/@babel/runtime/helpers/esm/arrayLikeToArray.js
var arrayLikeToArray = __webpack_require__(24);

// CONCATENATED MODULE: ./node_modules/@babel/runtime/helpers/esm/arrayWithoutHoles.js

function _arrayWithoutHoles(arr) {
  if (Array.isArray(arr)) return Object(arrayLikeToArray["a" /* default */])(arr);
}
// EXTERNAL MODULE: ./node_modules/@babel/runtime/helpers/esm/iterableToArray.js
var iterableToArray = __webpack_require__(37);

// EXTERNAL MODULE: ./node_modules/@babel/runtime/helpers/esm/unsupportedIterableToArray.js
var unsupportedIterableToArray = __webpack_require__(31);

// CONCATENATED MODULE: ./node_modules/@babel/runtime/helpers/esm/nonIterableSpread.js
function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
// CONCATENATED MODULE: ./node_modules/@babel/runtime/helpers/esm/toConsumableArray.js




function _toConsumableArray(arr) {
  return _arrayWithoutHoles(arr) || Object(iterableToArray["a" /* default */])(arr) || Object(unsupportedIterableToArray["a" /* default */])(arr) || _nonIterableSpread();
}

/***/ }),

/***/ 2:
/***/ (function(module, exports) {

(function() { module.exports = window["lodash"]; }());

/***/ }),

/***/ 24:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return _arrayLikeToArray; });
function _arrayLikeToArray(arr, len) {
  if (len == null || len > arr.length) len = arr.length;

  for (var i = 0, arr2 = new Array(len); i < len; i++) {
    arr2[i] = arr[i];
  }

  return arr2;
}

/***/ }),

/***/ 31:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return _unsupportedIterableToArray; });
/* harmony import */ var _babel_runtime_helpers_esm_arrayLikeToArray__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(24);

function _unsupportedIterableToArray(o, minLen) {
  if (!o) return;
  if (typeof o === "string") return Object(_babel_runtime_helpers_esm_arrayLikeToArray__WEBPACK_IMPORTED_MODULE_0__[/* default */ "a"])(o, minLen);
  var n = Object.prototype.toString.call(o).slice(8, -1);
  if (n === "Object" && o.constructor) n = o.constructor.name;
  if (n === "Map" || n === "Set") return Array.from(o);
  if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return Object(_babel_runtime_helpers_esm_arrayLikeToArray__WEBPACK_IMPORTED_MODULE_0__[/* default */ "a"])(o, minLen);
}

/***/ }),

/***/ 37:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return _iterableToArray; });
function _iterableToArray(iter) {
  if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
}

/***/ }),

/***/ 460:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
// ESM COMPAT FLAG
__webpack_require__.r(__webpack_exports__);

// EXPORTS
__webpack_require__.d(__webpack_exports__, "focus", function() { return /* binding */ build_module_focus; });
__webpack_require__.d(__webpack_exports__, "isHorizontalEdge", function() { return /* reexport */ isHorizontalEdge; });
__webpack_require__.d(__webpack_exports__, "isVerticalEdge", function() { return /* reexport */ isVerticalEdge; });
__webpack_require__.d(__webpack_exports__, "getRectangleFromRange", function() { return /* reexport */ getRectangleFromRange; });
__webpack_require__.d(__webpack_exports__, "computeCaretRect", function() { return /* reexport */ computeCaretRect; });
__webpack_require__.d(__webpack_exports__, "placeCaretAtHorizontalEdge", function() { return /* reexport */ placeCaretAtHorizontalEdge; });
__webpack_require__.d(__webpack_exports__, "placeCaretAtVerticalEdge", function() { return /* reexport */ placeCaretAtVerticalEdge; });
__webpack_require__.d(__webpack_exports__, "isTextField", function() { return /* reexport */ isTextField; });
__webpack_require__.d(__webpack_exports__, "isNumberInput", function() { return /* reexport */ isNumberInput; });
__webpack_require__.d(__webpack_exports__, "documentHasTextSelection", function() { return /* reexport */ documentHasTextSelection; });
__webpack_require__.d(__webpack_exports__, "documentHasUncollapsedSelection", function() { return /* reexport */ documentHasUncollapsedSelection; });
__webpack_require__.d(__webpack_exports__, "documentHasSelection", function() { return /* reexport */ documentHasSelection; });
__webpack_require__.d(__webpack_exports__, "isEntirelySelected", function() { return /* reexport */ isEntirelySelected; });
__webpack_require__.d(__webpack_exports__, "getScrollContainer", function() { return /* reexport */ getScrollContainer; });
__webpack_require__.d(__webpack_exports__, "getOffsetParent", function() { return /* reexport */ getOffsetParent; });
__webpack_require__.d(__webpack_exports__, "replace", function() { return /* reexport */ replace; });
__webpack_require__.d(__webpack_exports__, "remove", function() { return /* reexport */ remove; });
__webpack_require__.d(__webpack_exports__, "insertAfter", function() { return /* reexport */ insertAfter; });
__webpack_require__.d(__webpack_exports__, "unwrap", function() { return /* reexport */ unwrap; });
__webpack_require__.d(__webpack_exports__, "replaceTag", function() { return /* reexport */ replaceTag; });
__webpack_require__.d(__webpack_exports__, "wrap", function() { return /* reexport */ wrap; });
__webpack_require__.d(__webpack_exports__, "__unstableStripHTML", function() { return /* reexport */ __unstableStripHTML; });
__webpack_require__.d(__webpack_exports__, "isEmpty", function() { return /* reexport */ isEmpty; });
__webpack_require__.d(__webpack_exports__, "removeInvalidHTML", function() { return /* reexport */ removeInvalidHTML; });
__webpack_require__.d(__webpack_exports__, "getPhrasingContentSchema", function() { return /* reexport */ getPhrasingContentSchema; });
__webpack_require__.d(__webpack_exports__, "isPhrasingContent", function() { return /* reexport */ isPhrasingContent; });
__webpack_require__.d(__webpack_exports__, "isTextContent", function() { return /* reexport */ isTextContent; });
__webpack_require__.d(__webpack_exports__, "getFilesFromDataTransfer", function() { return /* reexport */ getFilesFromDataTransfer; });

// NAMESPACE OBJECT: ./node_modules/@wordpress/dom/build-module/focusable.js
var focusable_namespaceObject = {};
__webpack_require__.r(focusable_namespaceObject);
__webpack_require__.d(focusable_namespaceObject, "find", function() { return find; });

// NAMESPACE OBJECT: ./node_modules/@wordpress/dom/build-module/tabbable.js
var tabbable_namespaceObject = {};
__webpack_require__.r(tabbable_namespaceObject);
__webpack_require__.d(tabbable_namespaceObject, "isTabbableIndex", function() { return isTabbableIndex; });
__webpack_require__.d(tabbable_namespaceObject, "find", function() { return tabbable_find; });
__webpack_require__.d(tabbable_namespaceObject, "findPrevious", function() { return findPrevious; });
__webpack_require__.d(tabbable_namespaceObject, "findNext", function() { return findNext; });

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/focusable.js
/**
 * References:
 *
 * Focusable:
 *  - https://www.w3.org/TR/html5/editing.html#focus-management
 *
 * Sequential focus navigation:
 *  - https://www.w3.org/TR/html5/editing.html#sequential-focus-navigation-and-the-tabindex-attribute
 *
 * Disabled elements:
 *  - https://www.w3.org/TR/html5/disabled-elements.html#disabled-elements
 *
 * getClientRects algorithm (requiring layout box):
 *  - https://www.w3.org/TR/cssom-view-1/#extension-to-the-element-interface
 *
 * AREA elements associated with an IMG:
 *  - https://w3c.github.io/html/editing.html#data-model
 */
var SELECTOR = ['[tabindex]', 'a[href]', 'button:not([disabled])', 'input:not([type="hidden"]):not([disabled])', 'select:not([disabled])', 'textarea:not([disabled])', 'iframe', 'object', 'embed', 'area[href]', '[contenteditable]:not([contenteditable=false])'].join(',');
/**
 * Returns true if the specified element is visible (i.e. neither display: none
 * nor visibility: hidden).
 *
 * @param {Element} element DOM element to test.
 *
 * @return {boolean} Whether element is visible.
 */

function isVisible(element) {
  return element.offsetWidth > 0 || element.offsetHeight > 0 || element.getClientRects().length > 0;
}
/**
 * Returns true if the specified element should be skipped from focusable elements.
 * For now it rather specific for `iframes` and  if tabindex attribute is set to -1.
 *
 * @param {Element} element DOM element to test.
 *
 * @return {boolean} Whether element should be skipped from focusable elements.
 */


function skipFocus(element) {
  return element.nodeName.toLowerCase() === 'iframe' && element.getAttribute('tabindex') === '-1';
}
/**
 * Returns true if the specified area element is a valid focusable element, or
 * false otherwise. Area is only focusable if within a map where a named map
 * referenced by an image somewhere in the document.
 *
 * @param {Element} element DOM area element to test.
 *
 * @return {boolean} Whether area element is valid for focus.
 */


function isValidFocusableArea(element) {
  var map = element.closest('map[name]');

  if (!map) {
    return false;
  }

  var img = element.ownerDocument.querySelector('img[usemap="#' + map.name + '"]');
  return !!img && isVisible(img);
}
/**
 * Returns all focusable elements within a given context.
 *
 * @param {Element} context Element in which to search.
 *
 * @return {Element[]} Focusable elements.
 */


function find(context) {
  var elements = context.querySelectorAll(SELECTOR);
  return Array.from(elements).filter(function (element) {
    if (!isVisible(element) || skipFocus(element)) {
      return false;
    }

    var nodeName = element.nodeName;

    if ('AREA' === nodeName) {
      return isValidFocusableArea(element);
    }

    return true;
  });
}

// EXTERNAL MODULE: external "lodash"
var external_lodash_ = __webpack_require__(2);

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/tabbable.js
/**
 * External dependencies
 */

/**
 * Internal dependencies
 */


/**
 * Returns the tab index of the given element. In contrast with the tabIndex
 * property, this normalizes the default (0) to avoid browser inconsistencies,
 * operating under the assumption that this function is only ever called with a
 * focusable node.
 *
 * @see https://bugzilla.mozilla.org/show_bug.cgi?id=1190261
 *
 * @param {Element} element Element from which to retrieve.
 *
 * @return {?number} Tab index of element (default 0).
 */

function getTabIndex(element) {
  var tabIndex = element.getAttribute('tabindex');
  return tabIndex === null ? 0 : parseInt(tabIndex, 10);
}
/**
 * Returns true if the specified element is tabbable, or false otherwise.
 *
 * @param {Element} element Element to test.
 *
 * @return {boolean} Whether element is tabbable.
 */


function isTabbableIndex(element) {
  return getTabIndex(element) !== -1;
}
/**
 * Returns a stateful reducer function which constructs a filtered array of
 * tabbable elements, where at most one radio input is selected for a given
 * name, giving priority to checked input, falling back to the first
 * encountered.
 *
 * @return {Function} Radio group collapse reducer.
 */

function createStatefulCollapseRadioGroup() {
  var CHOSEN_RADIO_BY_NAME = {};
  return function collapseRadioGroup(result, element) {
    var nodeName = element.nodeName,
        type = element.type,
        checked = element.checked,
        name = element.name; // For all non-radio tabbables, construct to array by concatenating.

    if (nodeName !== 'INPUT' || type !== 'radio' || !name) {
      return result.concat(element);
    }

    var hasChosen = CHOSEN_RADIO_BY_NAME.hasOwnProperty(name); // Omit by skipping concatenation if the radio element is not chosen.

    var isChosen = checked || !hasChosen;

    if (!isChosen) {
      return result;
    } // At this point, if there had been a chosen element, the current
    // element is checked and should take priority. Retroactively remove
    // the element which had previously been considered the chosen one.


    if (hasChosen) {
      var hadChosenElement = CHOSEN_RADIO_BY_NAME[name];
      result = Object(external_lodash_["without"])(result, hadChosenElement);
    }

    CHOSEN_RADIO_BY_NAME[name] = element;
    return result.concat(element);
  };
}
/**
 * An array map callback, returning an object with the element value and its
 * array index location as properties. This is used to emulate a proper stable
 * sort where equal tabIndex should be left in order of their occurrence in the
 * document.
 *
 * @param {Element} element Element.
 * @param {number}  index   Array index of element.
 *
 * @return {Object} Mapped object with element, index.
 */


function mapElementToObjectTabbable(element, index) {
  return {
    element: element,
    index: index
  };
}
/**
 * An array map callback, returning an element of the given mapped object's
 * element value.
 *
 * @param {Object} object Mapped object with index.
 *
 * @return {Element} Mapped object element.
 */


function mapObjectTabbableToElement(object) {
  return object.element;
}
/**
 * A sort comparator function used in comparing two objects of mapped elements.
 *
 * @see mapElementToObjectTabbable
 *
 * @param {Object} a First object to compare.
 * @param {Object} b Second object to compare.
 *
 * @return {number} Comparator result.
 */


function compareObjectTabbables(a, b) {
  var aTabIndex = getTabIndex(a.element);
  var bTabIndex = getTabIndex(b.element);

  if (aTabIndex === bTabIndex) {
    return a.index - b.index;
  }

  return aTabIndex - bTabIndex;
}
/**
 * Givin focusable elements, filters out tabbable element.
 *
 * @param {Array} focusables Focusable elements to filter.
 *
 * @return {Array} Tabbable elements.
 */


function filterTabbable(focusables) {
  return focusables.filter(isTabbableIndex).map(mapElementToObjectTabbable).sort(compareObjectTabbables).map(mapObjectTabbableToElement).reduce(createStatefulCollapseRadioGroup(), []);
}

function tabbable_find(context) {
  return filterTabbable(find(context));
}
/**
 * Given a focusable element, find the preceding tabbable element.
 *
 * @param {Element} element The focusable element before which to look. Defaults
 *                          to the active element.
 */

function findPrevious(element) {
  var focusables = find(element.ownerDocument.body);
  var index = focusables.indexOf(element); // Remove all focusables after and including `element`.

  focusables.length = index;
  return Object(external_lodash_["last"])(filterTabbable(focusables));
}
/**
 * Given a focusable element, find the next tabbable element.
 *
 * @param {Element} element The focusable element after which to look. Defaults
 *                          to the active element.
 */

function findNext(element) {
  var focusables = find(element.ownerDocument.body);
  var index = focusables.indexOf(element); // Remove all focusables before and inside `element`.

  var remaining = focusables.slice(index + 1).filter(function (node) {
    return !element.contains(node);
  });
  return Object(external_lodash_["first"])(filterTabbable(remaining));
}

// EXTERNAL MODULE: ./node_modules/@babel/runtime/helpers/esm/toConsumableArray.js + 2 modules
var toConsumableArray = __webpack_require__(15);

// EXTERNAL MODULE: ./node_modules/@babel/runtime/helpers/esm/defineProperty.js
var defineProperty = __webpack_require__(5);

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/phrasing-content.js


function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { Object(defineProperty["a" /* default */])(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

/**
 * External dependencies
 */

/**
 * All phrasing content elements.
 *
 * @see https://www.w3.org/TR/2011/WD-html5-20110525/content-models.html#phrasing-content-0
 */

/**
 * All text-level semantic elements.
 *
 * @see https://html.spec.whatwg.org/multipage/text-level-semantics.html
 */

var textContentSchema = {
  strong: {},
  em: {},
  s: {},
  del: {},
  ins: {},
  a: {
    attributes: ['href', 'target', 'rel']
  },
  code: {},
  abbr: {
    attributes: ['title']
  },
  sub: {},
  sup: {},
  br: {},
  small: {},
  // To do: fix blockquote.
  // cite: {},
  q: {
    attributes: ['cite']
  },
  dfn: {
    attributes: ['title']
  },
  data: {
    attributes: ['value']
  },
  time: {
    attributes: ['datetime']
  },
  var: {},
  samp: {},
  kbd: {},
  i: {},
  b: {},
  u: {},
  mark: {},
  ruby: {},
  rt: {},
  rp: {},
  bdi: {
    attributes: ['dir']
  },
  bdo: {
    attributes: ['dir']
  },
  wbr: {},
  '#text': {}
}; // Recursion is needed.
// Possible: strong > em > strong.
// Impossible: strong > strong.

Object(external_lodash_["without"])(Object.keys(textContentSchema), '#text', 'br').forEach(function (tag) {
  textContentSchema[tag].children = Object(external_lodash_["omit"])(textContentSchema, tag);
});
/**
 * Embedded content elements.
 *
 * @see https://www.w3.org/TR/2011/WD-html5-20110525/content-models.html#embedded-content-0
 */

var embeddedContentSchema = {
  audio: {
    attributes: ['src', 'preload', 'autoplay', 'mediagroup', 'loop', 'muted']
  },
  canvas: {
    attributes: ['width', 'height']
  },
  embed: {
    attributes: ['src', 'type', 'width', 'height']
  },
  img: {
    attributes: ['alt', 'src', 'srcset', 'usemap', 'ismap', 'width', 'height']
  },
  object: {
    attributes: ['data', 'type', 'name', 'usemap', 'form', 'width', 'height']
  },
  video: {
    attributes: ['src', 'poster', 'preload', 'autoplay', 'mediagroup', 'loop', 'muted', 'controls', 'width', 'height']
  }
};
/**
 * Phrasing content elements.
 *
 * @see https://www.w3.org/TR/2011/WD-html5-20110525/content-models.html#phrasing-content-0
 */

var phrasingContentSchema = _objectSpread(_objectSpread({}, textContentSchema), embeddedContentSchema);
/**
 * Get schema of possible paths for phrasing content.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content
 *
 * @param {string} context Set to "paste" to exclude invisible elements and
 *                         sensitive data.
 *
 * @return {Object} Schema.
 */


function getPhrasingContentSchema(context) {
  if (context !== 'paste') {
    return phrasingContentSchema;
  }

  return Object(external_lodash_["omit"])(_objectSpread(_objectSpread({}, phrasingContentSchema), {}, {
    // We shouldn't paste potentially sensitive information which is not
    // visible to the user when pasted, so strip the attributes.
    ins: {
      children: phrasingContentSchema.ins.children
    },
    del: {
      children: phrasingContentSchema.del.children
    }
  }), ['u', // Used to mark misspelling. Shouldn't be pasted.
  'abbr', // Invisible.
  'data', // Invisible.
  'time', // Invisible.
  'wbr', // Invisible.
  'bdi', // Invisible.
  'bdo' // Invisible.
  ]);
}
/**
 * Find out whether or not the given node is phrasing content.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content
 *
 * @param {Element} node The node to test.
 *
 * @return {boolean} True if phrasing content, false if not.
 */

function isPhrasingContent(node) {
  var tag = node.nodeName.toLowerCase();
  return getPhrasingContentSchema().hasOwnProperty(tag) || tag === 'span';
}
function isTextContent(node) {
  var tag = node.nodeName.toLowerCase();
  return textContentSchema.hasOwnProperty(tag) || tag === 'span';
}

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/dom.js


/**
 * External dependencies
 */

/**
 * Internal dependencies
 */



function getComputedStyle(node) {
  return node.ownerDocument.defaultView.getComputedStyle(node);
}
/**
 * Gets the height of the range without ignoring zero width rectangles, which
 * some browsers ignore when creating a union.
 *
 * @param {Range} range The range to check.
 */


function getRangeHeight(range) {
  var rects = Array.from(range.getClientRects());

  if (!rects.length) {
    return;
  }

  var highestTop = Math.min.apply(Math, Object(toConsumableArray["a" /* default */])(rects.map(function (_ref) {
    var top = _ref.top;
    return top;
  })));
  var lowestBottom = Math.max.apply(Math, Object(toConsumableArray["a" /* default */])(rects.map(function (_ref2) {
    var bottom = _ref2.bottom;
    return bottom;
  })));
  return lowestBottom - highestTop;
}
/**
 * Returns true if the given selection object is in the forward direction, or
 * false otherwise.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/API/Node/compareDocumentPosition
 *
 * @param {Selection} selection Selection object to check.
 *
 * @return {boolean} Whether the selection is forward.
 */


function isSelectionForward(selection) {
  var anchorNode = selection.anchorNode,
      focusNode = selection.focusNode,
      anchorOffset = selection.anchorOffset,
      focusOffset = selection.focusOffset;
  var position = anchorNode.compareDocumentPosition(focusNode); // Disable reason: `Node#compareDocumentPosition` returns a bitmask value,
  // so bitwise operators are intended.

  /* eslint-disable no-bitwise */
  // Compare whether anchor node precedes focus node. If focus node (where
  // end of selection occurs) is after the anchor node, it is forward.

  if (position & anchorNode.DOCUMENT_POSITION_PRECEDING) {
    return false;
  }

  if (position & anchorNode.DOCUMENT_POSITION_FOLLOWING) {
    return true;
  }
  /* eslint-enable no-bitwise */
  // `compareDocumentPosition` returns 0 when passed the same node, in which
  // case compare offsets.


  if (position === 0) {
    return anchorOffset <= focusOffset;
  } // This should never be reached, but return true as default case.


  return true;
}
/**
 * Check whether the selection is at the edge of the container. Checks for
 * horizontal position by default. Set `onlyVertical` to true to check only
 * vertically.
 *
 * @param {Element} container    Focusable element.
 * @param {boolean} isReverse    Set to true to check left, false to check right.
 * @param {boolean} onlyVertical Set to true to check only vertical position.
 *
 * @return {boolean} True if at the edge, false if not.
 */


function isEdge(container, isReverse, onlyVertical) {
  if (Object(external_lodash_["includes"])(['INPUT', 'TEXTAREA'], container.tagName)) {
    if (container.selectionStart !== container.selectionEnd) {
      return false;
    }

    if (isReverse) {
      return container.selectionStart === 0;
    }

    return container.value.length === container.selectionStart;
  }

  if (!container.isContentEditable) {
    return true;
  }

  var ownerDocument = container.ownerDocument;
  var defaultView = ownerDocument.defaultView;
  var selection = defaultView.getSelection();

  if (!selection.rangeCount) {
    return false;
  }

  var range = selection.getRangeAt(0);
  var collapsedRange = range.cloneRange();
  var isForward = isSelectionForward(selection);
  var isCollapsed = selection.isCollapsed; // Collapse in direction of selection.

  if (!isCollapsed) {
    collapsedRange.collapse(!isForward);
  }

  var collapsedRangeRect = getRectangleFromRange(collapsedRange);
  var rangeRect = getRectangleFromRange(range);

  if (!collapsedRangeRect || !rangeRect) {
    return false;
  } // Only consider the multiline selection at the edge if the direction is
  // towards the edge. The selection is multiline if it is taller than the
  // collapsed  selection.


  if (!isCollapsed && getRangeHeight(range) > collapsedRangeRect.height && isForward === isReverse) {
    return false;
  } // In the case of RTL scripts, the horizontal edge is at the opposite side.


  var _getComputedStyle = getComputedStyle(container),
      direction = _getComputedStyle.direction;

  var isReverseDir = direction === 'rtl' ? !isReverse : isReverse;
  var containerRect = container.getBoundingClientRect(); // To check if a selection is at the edge, we insert a test selection at the
  // edge of the container and check if the selections have the same vertical
  // or horizontal position. If they do, the selection is at the edge.
  // This method proves to be better than a DOM-based calculation for the
  // horizontal edge, since it ignores empty textnodes and a trailing line
  // break element. In other words, we need to check visual positioning, not
  // DOM positioning.
  // It also proves better than using the computed style for the vertical
  // edge, because we cannot know the padding and line height reliably in
  // pixels. `getComputedStyle` may return a value with different units.

  var x = isReverseDir ? containerRect.left + 1 : containerRect.right - 1;
  var y = isReverse ? containerRect.top + 1 : containerRect.bottom - 1;
  var testRange = hiddenCaretRangeFromPoint(ownerDocument, x, y, container);

  if (!testRange) {
    return false;
  }

  var testRect = getRectangleFromRange(testRange);

  if (!testRect) {
    return false;
  }

  var verticalSide = isReverse ? 'top' : 'bottom';
  var horizontalSide = isReverseDir ? 'left' : 'right';
  var verticalDiff = testRect[verticalSide] - rangeRect[verticalSide];
  var horizontalDiff = testRect[horizontalSide] - collapsedRangeRect[horizontalSide]; // Allow the position to be 1px off.

  var hasVerticalDiff = Math.abs(verticalDiff) <= 1;
  var hasHorizontalDiff = Math.abs(horizontalDiff) <= 1;
  return onlyVertical ? hasVerticalDiff : hasVerticalDiff && hasHorizontalDiff;
}
/**
 * Check whether the selection is horizontally at the edge of the container.
 *
 * @param {Element} container Focusable element.
 * @param {boolean} isReverse Set to true to check left, false for right.
 *
 * @return {boolean} True if at the horizontal edge, false if not.
 */


function isHorizontalEdge(container, isReverse) {
  return isEdge(container, isReverse);
}
/**
 * Check whether the selection is vertically at the edge of the container.
 *
 * @param {Element} container Focusable element.
 * @param {boolean} isReverse Set to true to check top, false for bottom.
 *
 * @return {boolean} True if at the vertical edge, false if not.
 */

function isVerticalEdge(container, isReverse) {
  return isEdge(container, isReverse, true);
}
/**
 * Get the rectangle of a given Range.
 *
 * @param {Range} range The range.
 *
 * @return {DOMRect} The rectangle.
 */

function getRectangleFromRange(range) {
  // For uncollapsed ranges, get the rectangle that bounds the contents of the
  // range; this a rectangle enclosing the union of the bounding rectangles
  // for all the elements in the range.
  if (!range.collapsed) {
    return range.getBoundingClientRect();
  }

  var _range = range,
      startContainer = _range.startContainer;
  var ownerDocument = startContainer.ownerDocument; // Correct invalid "BR" ranges. The cannot contain any children.

  if (startContainer.nodeName === 'BR') {
    var parentNode = startContainer.parentNode;
    var index = Array.from(parentNode.childNodes).indexOf(startContainer);
    range = ownerDocument.createRange();
    range.setStart(parentNode, index);
    range.setEnd(parentNode, index);
  }

  var rect = range.getClientRects()[0]; // If the collapsed range starts (and therefore ends) at an element node,
  // `getClientRects` can be empty in some browsers. This can be resolved
  // by adding a temporary text node with zero-width space to the range.
  //
  // See: https://stackoverflow.com/a/6847328/995445

  if (!rect) {
    var padNode = ownerDocument.createTextNode("\u200B"); // Do not modify the live range.

    range = range.cloneRange();
    range.insertNode(padNode);
    rect = range.getClientRects()[0];
    padNode.parentNode.removeChild(padNode);
  }

  return rect;
}
/**
 * Get the rectangle for the selection in a container.
 *
 * @param {Window} win The window of the selection.
 *
 * @return {?DOMRect} The rectangle.
 */

function computeCaretRect(win) {
  var selection = win.getSelection();
  var range = selection.rangeCount ? selection.getRangeAt(0) : null;

  if (!range) {
    return;
  }

  return getRectangleFromRange(range);
}
/**
 * Places the caret at start or end of a given element.
 *
 * @param {Element} container Focusable element.
 * @param {boolean} isReverse True for end, false for start.
 */

function placeCaretAtHorizontalEdge(container, isReverse) {
  if (!container) {
    return;
  }

  if (Object(external_lodash_["includes"])(['INPUT', 'TEXTAREA'], container.tagName)) {
    container.focus();

    if (isReverse) {
      container.selectionStart = container.value.length;
      container.selectionEnd = container.value.length;
    } else {
      container.selectionStart = 0;
      container.selectionEnd = 0;
    }

    return;
  }

  container.focus();

  if (!container.isContentEditable) {
    return;
  } // Select on extent child of the container, not the container itself. This
  // avoids the selection always being `endOffset` of 1 when placed at end,
  // where `startContainer`, `endContainer` would always be container itself.


  var rangeTarget = container[isReverse ? 'lastChild' : 'firstChild']; // If no range target, it implies that the container is empty. Focusing is
  // sufficient for caret to be placed correctly.

  if (!rangeTarget) {
    return;
  }

  var ownerDocument = container.ownerDocument;
  var defaultView = ownerDocument.defaultView;
  var selection = defaultView.getSelection();
  var range = ownerDocument.createRange();
  range.selectNodeContents(rangeTarget);
  range.collapse(!isReverse);
  selection.removeAllRanges();
  selection.addRange(range);
}
/**
 * Polyfill.
 * Get a collapsed range for a given point.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/API/Document/caretRangeFromPoint
 *
 * @param {Document} doc  The document of the range.
 * @param {number}   x    Horizontal position within the current viewport.
 * @param {number}   y    Vertical position within the current viewport.
 *
 * @return {?Range} The best range for the given point.
 */

function caretRangeFromPoint(doc, x, y) {
  if (doc.caretRangeFromPoint) {
    return doc.caretRangeFromPoint(x, y);
  }

  if (!doc.caretPositionFromPoint) {
    return null;
  }

  var point = doc.caretPositionFromPoint(x, y); // If x or y are negative, outside viewport, or there is no text entry node.
  // https://developer.mozilla.org/en-US/docs/Web/API/Document/caretRangeFromPoint

  if (!point) {
    return null;
  }

  var range = doc.createRange();
  range.setStart(point.offsetNode, point.offset);
  range.collapse(true);
  return range;
}
/**
 * Get a collapsed range for a given point.
 * Gives the container a temporary high z-index (above any UI).
 * This is preferred over getting the UI nodes and set styles there.
 *
 * @param {Document} doc       The document of the range.
 * @param {number}    x         Horizontal position within the current viewport.
 * @param {number}    y         Vertical position within the current viewport.
 * @param {Element}  container Container in which the range is expected to be found.
 *
 * @return {?Range} The best range for the given point.
 */


function hiddenCaretRangeFromPoint(doc, x, y, container) {
  var originalZIndex = container.style.zIndex;
  var originalPosition = container.style.position; // A z-index only works if the element position is not static.

  container.style.zIndex = '10000';
  container.style.position = 'relative';
  var range = caretRangeFromPoint(doc, x, y);
  container.style.zIndex = originalZIndex;
  container.style.position = originalPosition;
  return range;
}
/**
 * Places the caret at the top or bottom of a given element.
 *
 * @param {Element} container           Focusable element.
 * @param {boolean} isReverse           True for bottom, false for top.
 * @param {DOMRect} [rect]              The rectangle to position the caret with.
 * @param {boolean} [mayUseScroll=true] True to allow scrolling, false to disallow.
 */


function placeCaretAtVerticalEdge(container, isReverse, rect) {
  var mayUseScroll = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : true;

  if (!container) {
    return;
  }

  if (!rect || !container.isContentEditable) {
    placeCaretAtHorizontalEdge(container, isReverse);
    return;
  } // Offset by a buffer half the height of the caret rect. This is needed
  // because caretRangeFromPoint may default to the end of the selection if
  // offset is too close to the edge. It's unclear how to precisely calculate
  // this threshold; it may be the padded area of some combination of line
  // height, caret height, and font size. The buffer offset is effectively
  // equivalent to a point at half the height of a line of text.


  var buffer = rect.height / 2;
  var editableRect = container.getBoundingClientRect();
  var x = rect.left;
  var y = isReverse ? editableRect.bottom - buffer : editableRect.top + buffer;
  var ownerDocument = container.ownerDocument;
  var defaultView = ownerDocument.defaultView;
  var range = hiddenCaretRangeFromPoint(ownerDocument, x, y, container);

  if (!range || !container.contains(range.startContainer)) {
    if (mayUseScroll && (!range || !range.startContainer || !range.startContainer.contains(container))) {
      // Might be out of view.
      // Easier than attempting to calculate manually.
      container.scrollIntoView(isReverse);
      placeCaretAtVerticalEdge(container, isReverse, rect, false);
      return;
    }

    placeCaretAtHorizontalEdge(container, isReverse);
    return;
  }

  var selection = defaultView.getSelection();
  selection.removeAllRanges();
  selection.addRange(range);
  container.focus(); // Editable was already focussed, it goes back to old range...
  // This fixes it.

  selection.removeAllRanges();
  selection.addRange(range);
}
/**
 * Check whether the given element is a text field, where text field is defined
 * by the ability to select within the input, or that it is contenteditable.
 *
 * See: https://html.spec.whatwg.org/#textFieldSelection
 *
 * @param {HTMLElement} element The HTML element.
 *
 * @return {boolean} True if the element is an text field, false if not.
 */

function isTextField(element) {
  var nodeName = element.nodeName,
      contentEditable = element.contentEditable;
  var nonTextInputs = ['button', 'checkbox', 'hidden', 'file', 'radio', 'image', 'range', 'reset', 'submit', 'number'];
  return nodeName === 'INPUT' && !nonTextInputs.includes(element.type) || nodeName === 'TEXTAREA' || contentEditable === 'true';
}
/**
 * Check whether the given element is an input field of type number
 * and has a valueAsNumber
 *
 * @param {HTMLElement} element The HTML element.
 *
 * @return {boolean} True if the element is input and holds a number.
 */

function isNumberInput(element) {
  var nodeName = element.nodeName,
      type = element.type,
      valueAsNumber = element.valueAsNumber;
  return nodeName === 'INPUT' && type === 'number' && !!valueAsNumber;
}
/**
 * Check whether the current document has selected text. This applies to ranges
 * of text in the document, and not selection inside <input> and <textarea>
 * elements.
 *
 * See: https://developer.mozilla.org/en-US/docs/Web/API/Window/getSelection#Related_objects.
 *
 * @param {Document} doc The document to check.
 *
 * @return {boolean} True if there is selection, false if not.
 */

function documentHasTextSelection(doc) {
  var selection = doc.defaultView.getSelection();
  var range = selection.rangeCount ? selection.getRangeAt(0) : null;
  return range && !range.collapsed;
}
/**
 * Check whether the given element, assumed an input field or textarea,
 * contains a (uncollapsed) selection of text.
 *
 * Note: this is perhaps an abuse of the term "selection", since these elements
 * manage selection differently and aren't covered by Selection#collapsed.
 *
 * See: https://developer.mozilla.org/en-US/docs/Web/API/Window/getSelection#Related_objects.
 *
 * @param {HTMLElement} element The HTML element.
 *
 * @return {boolean} Whether the input/textareaa element has some "selection".
 */

function inputFieldHasUncollapsedSelection(element) {
  if (!isTextField(element) && !isNumberInput(element)) {
    return false;
  }

  try {
    var selectionStart = element.selectionStart,
        selectionEnd = element.selectionEnd;
    return selectionStart !== null && selectionStart !== selectionEnd;
  } catch (error) {
    // Safari throws an exception when trying to get `selectionStart`
    // on non-text <input> elements (which, understandably, don't
    // have the text selection API). We catch this via a try/catch
    // block, as opposed to a more explicit check of the element's
    // input types, because of Safari's non-standard behavior. This
    // also means we don't have to worry about the list of input
    // types that support `selectionStart` changing as the HTML spec
    // evolves over time.
    return false;
  }
}
/**
 * Check whether the current document has any sort of selection. This includes
 * ranges of text across elements and any selection inside <input> and
 * <textarea> elements.
 *
 * @param {Document} doc The document to check.
 *
 * @return {boolean} Whether there is any sort of "selection" in the document.
 */


function documentHasUncollapsedSelection(doc) {
  return documentHasTextSelection(doc) || inputFieldHasUncollapsedSelection(doc.activeElement);
}
/**
 * Check whether the current document has a selection. This checks for both
 * focus in an input field and general text selection.
 *
 * @param {Document} doc The document to check.
 *
 * @return {boolean} True if there is selection, false if not.
 */

function documentHasSelection(doc) {
  return isTextField(doc.activeElement) || isNumberInput(doc.activeElement) || documentHasTextSelection(doc);
}
/**
 * Check whether the contents of the element have been entirely selected.
 * Returns true if there is no possibility of selection.
 *
 * @param {Element} element The element to check.
 *
 * @return {boolean} True if entirely selected, false if not.
 */

function isEntirelySelected(element) {
  if (Object(external_lodash_["includes"])(['INPUT', 'TEXTAREA'], element.nodeName)) {
    return element.selectionStart === 0 && element.value.length === element.selectionEnd;
  }

  if (!element.isContentEditable) {
    return true;
  }

  var ownerDocument = element.ownerDocument;
  var defaultView = ownerDocument.defaultView;
  var selection = defaultView.getSelection();
  var range = selection.rangeCount ? selection.getRangeAt(0) : null;

  if (!range) {
    return true;
  }

  var startContainer = range.startContainer,
      endContainer = range.endContainer,
      startOffset = range.startOffset,
      endOffset = range.endOffset;

  if (startContainer === element && endContainer === element && startOffset === 0 && endOffset === element.childNodes.length) {
    return true;
  }

  var lastChild = element.lastChild;
  var lastChildContentLength = lastChild.nodeType === lastChild.TEXT_NODE ? lastChild.data.length : lastChild.childNodes.length;
  return startContainer === element.firstChild && endContainer === element.lastChild && startOffset === 0 && endOffset === lastChildContentLength;
}
/**
 * Given a DOM node, finds the closest scrollable container node.
 *
 * @param {Element} node Node from which to start.
 *
 * @return {?Element} Scrollable container node, if found.
 */

function getScrollContainer(node) {
  if (!node) {
    return;
  } // Scrollable if scrollable height exceeds displayed...


  if (node.scrollHeight > node.clientHeight) {
    // ...except when overflow is defined to be hidden or visible
    var _getComputedStyle2 = getComputedStyle(node),
        overflowY = _getComputedStyle2.overflowY;

    if (/(auto|scroll)/.test(overflowY)) {
      return node;
    }
  } // Continue traversing


  return getScrollContainer(node.parentNode);
}
/**
 * Returns the closest positioned element, or null under any of the conditions
 * of the offsetParent specification. Unlike offsetParent, this function is not
 * limited to HTMLElement and accepts any Node (e.g. Node.TEXT_NODE).
 *
 * @see https://drafts.csswg.org/cssom-view/#dom-htmlelement-offsetparent
 *
 * @param {Node} node Node from which to find offset parent.
 *
 * @return {?Node} Offset parent.
 */

function getOffsetParent(node) {
  // Cannot retrieve computed style or offset parent only anything other than
  // an element node, so find the closest element node.
  var closestElement;

  while (closestElement = node.parentNode) {
    if (closestElement.nodeType === closestElement.ELEMENT_NODE) {
      break;
    }
  }

  if (!closestElement) {
    return null;
  } // If the closest element is already positioned, return it, as offsetParent
  // does not otherwise consider the node itself.


  if (getComputedStyle(closestElement).position !== 'static') {
    return closestElement;
  }

  return closestElement.offsetParent;
}
/**
 * Given two DOM nodes, replaces the former with the latter in the DOM.
 *
 * @param {Element} processedNode Node to be removed.
 * @param {Element} newNode       Node to be inserted in its place.
 * @return {void}
 */

function replace(processedNode, newNode) {
  insertAfter(newNode, processedNode.parentNode);
  remove(processedNode);
}
/**
 * Given a DOM node, removes it from the DOM.
 *
 * @param {Element} node Node to be removed.
 * @return {void}
 */

function remove(node) {
  node.parentNode.removeChild(node);
}
/**
 * Given two DOM nodes, inserts the former in the DOM as the next sibling of
 * the latter.
 *
 * @param {Element} newNode       Node to be inserted.
 * @param {Element} referenceNode Node after which to perform the insertion.
 * @return {void}
 */

function insertAfter(newNode, referenceNode) {
  referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}
/**
 * Unwrap the given node. This means any child nodes are moved to the parent.
 *
 * @param {Node} node The node to unwrap.
 *
 * @return {void}
 */

function unwrap(node) {
  var parent = node.parentNode;

  while (node.firstChild) {
    parent.insertBefore(node.firstChild, node);
  }

  parent.removeChild(node);
}
/**
 * Replaces the given node with a new node with the given tag name.
 *
 * @param {Element}  node    The node to replace
 * @param {string}   tagName The new tag name.
 *
 * @return {Element} The new node.
 */

function replaceTag(node, tagName) {
  var newNode = node.ownerDocument.createElement(tagName);

  while (node.firstChild) {
    newNode.appendChild(node.firstChild);
  }

  node.parentNode.replaceChild(newNode, node);
  return newNode;
}
/**
 * Wraps the given node with a new node with the given tag name.
 *
 * @param {Element} newNode       The node to insert.
 * @param {Element} referenceNode The node to wrap.
 */

function wrap(newNode, referenceNode) {
  referenceNode.parentNode.insertBefore(newNode, referenceNode);
  newNode.appendChild(referenceNode);
}
/**
 * Removes any HTML tags from the provided string.
 *
 * @param {string} html The string containing html.
 *
 * @return {string} The text content with any html removed.
 */

function __unstableStripHTML(html) {
  var document = new window.DOMParser().parseFromString(html, 'text/html');
  return document.body.textContent || '';
}
/**
 * Given a schema, unwraps or removes nodes, attributes and classes on a node
 * list.
 *
 * @param {NodeList} nodeList The nodeList to filter.
 * @param {Document} doc      The document of the nodeList.
 * @param {Object}   schema   An array of functions that can mutate with the provided node.
 * @param {Object}   inline   Whether to clean for inline mode.
 */

function cleanNodeList(nodeList, doc, schema, inline) {
  Array.from(nodeList).forEach(function (node) {
    var tag = node.nodeName.toLowerCase(); // It's a valid child, if the tag exists in the schema without an isMatch
    // function, or with an isMatch function that matches the node.

    if (schema.hasOwnProperty(tag) && (!schema[tag].isMatch || schema[tag].isMatch(node))) {
      if (node.nodeType === node.ELEMENT_NODE) {
        var _schema$tag = schema[tag],
            _schema$tag$attribute = _schema$tag.attributes,
            attributes = _schema$tag$attribute === void 0 ? [] : _schema$tag$attribute,
            _schema$tag$classes = _schema$tag.classes,
            classes = _schema$tag$classes === void 0 ? [] : _schema$tag$classes,
            children = _schema$tag.children,
            _schema$tag$require = _schema$tag.require,
            require = _schema$tag$require === void 0 ? [] : _schema$tag$require,
            allowEmpty = _schema$tag.allowEmpty; // If the node is empty and it's supposed to have children,
        // remove the node.


        if (children && !allowEmpty && isEmpty(node)) {
          remove(node);
          return;
        }

        if (node.hasAttributes()) {
          // Strip invalid attributes.
          Array.from(node.attributes).forEach(function (_ref3) {
            var name = _ref3.name;

            if (name !== 'class' && !Object(external_lodash_["includes"])(attributes, name)) {
              node.removeAttribute(name);
            }
          }); // Strip invalid classes.
          // In jsdom-jscore, 'node.classList' can be undefined.
          // TODO: Explore patching this in jsdom-jscore.

          if (node.classList && node.classList.length) {
            var mattchers = classes.map(function (item) {
              if (typeof item === 'string') {
                return function (className) {
                  return className === item;
                };
              } else if (item instanceof RegExp) {
                return function (className) {
                  return item.test(className);
                };
              }

              return external_lodash_["noop"];
            });
            Array.from(node.classList).forEach(function (name) {
              if (!mattchers.some(function (isMatch) {
                return isMatch(name);
              })) {
                node.classList.remove(name);
              }
            });

            if (!node.classList.length) {
              node.removeAttribute('class');
            }
          }
        }

        if (node.hasChildNodes()) {
          // Do not filter any content.
          if (children === '*') {
            return;
          } // Continue if the node is supposed to have children.


          if (children) {
            // If a parent requires certain children, but it does
            // not have them, drop the parent and continue.
            if (require.length && !node.querySelector(require.join(','))) {
              cleanNodeList(node.childNodes, doc, schema, inline);
              unwrap(node); // If the node is at the top, phrasing content, and
              // contains children that are block content, unwrap
              // the node because it is invalid.
            } else if (node.parentNode.nodeName === 'BODY' && isPhrasingContent(node)) {
              cleanNodeList(node.childNodes, doc, schema, inline);

              if (Array.from(node.childNodes).some(function (child) {
                return !isPhrasingContent(child);
              })) {
                unwrap(node);
              }
            } else {
              cleanNodeList(node.childNodes, doc, children, inline);
            } // Remove children if the node is not supposed to have any.

          } else {
            while (node.firstChild) {
              remove(node.firstChild);
            }
          }
        }
      } // Invalid child. Continue with schema at the same place and unwrap.

    } else {
      cleanNodeList(node.childNodes, doc, schema, inline); // For inline mode, insert a line break when unwrapping nodes that
      // are not phrasing content.

      if (inline && !isPhrasingContent(node) && node.nextElementSibling) {
        insertAfter(doc.createElement('br'), node);
      }

      unwrap(node);
    }
  });
}
/**
 * Recursively checks if an element is empty. An element is not empty if it
 * contains text or contains elements with attributes such as images.
 *
 * @param {Element} element The element to check.
 *
 * @return {boolean} Whether or not the element is empty.
 */


function isEmpty(element) {
  if (!element.hasChildNodes()) {
    return true;
  }

  return Array.from(element.childNodes).every(function (node) {
    if (node.nodeType === node.TEXT_NODE) {
      return !node.nodeValue.trim();
    }

    if (node.nodeType === node.ELEMENT_NODE) {
      if (node.nodeName === 'BR') {
        return true;
      } else if (node.hasAttributes()) {
        return false;
      }

      return isEmpty(node);
    }

    return true;
  });
}
/**
 * Given a schema, unwraps or removes nodes, attributes and classes on HTML.
 *
 * @param {string} HTML   The HTML to clean up.
 * @param {Object} schema Schema for the HTML.
 * @param {Object} inline Whether to clean for inline mode.
 *
 * @return {string} The cleaned up HTML.
 */

function removeInvalidHTML(HTML, schema, inline) {
  var doc = document.implementation.createHTMLDocument('');
  doc.body.innerHTML = HTML;
  cleanNodeList(doc.body.childNodes, doc, schema, inline);
  return doc.body.innerHTML;
}

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/data-transfer.js


/**
 * Gets all files from a DataTransfer object.
 *
 * @param {DataTransfer} dataTransfer DataTransfer object to inspect.
 *
 * @return {Object[]} An array containing all files.
 */
function getFilesFromDataTransfer(dataTransfer) {
  var files = Object(toConsumableArray["a" /* default */])(dataTransfer.files);

  Array.from(dataTransfer.items).forEach(function (item) {
    var file = item.getAsFile();

    if (file && !files.find(function (_ref) {
      var name = _ref.name,
          type = _ref.type,
          size = _ref.size;
      return name === file.name && type === file.type && size === file.size;
    })) {
      files.push(file);
    }
  });
  return files;
}

// CONCATENATED MODULE: ./node_modules/@wordpress/dom/build-module/index.js
/**
 * Internal dependencies
 */


/**
 * Object grouping `focusable` and `tabbable` utils
 * under the keys with the same name.
 */

var build_module_focus = {
  focusable: focusable_namespaceObject,
  tabbable: tabbable_namespaceObject
};





/***/ }),

/***/ 5:
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return _defineProperty; });
function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }

  return obj;
}

/***/ })

/******/ });