/******/ 		};

/************************************************************************/

/**

 * External dependencies

 */

/**

 * A set of tokens.

 *

 * @see https://dom.spec.whatwg.org/#domtokenlist

 */

class TokenList {

  /**

   * Constructs a new instance of TokenList.

   *

   * @param {string} initialValue Initial value to assign.

   */

    this.value = initialValue; // Disable reason: These are type hints on the class.

    /* eslint-disable no-unused-expressions */

    /** @type {string} */

    this._currentValue;

    /** @type {string[]} */

    this._valueAsArray;

    /* eslint-enable no-unused-expressions */

  }

  /**

   * @param {Parameters<Array<string>['entries']>} args

   */

  }

  /**

   * @param {Parameters<Array<string>['forEach']>} args

   */

  }

  /**

   * @param {Parameters<Array<string>['keys']>} args

   */

  }

  /**

   * @param {Parameters<Array<string>['values']>} args

   */

  }

  /**

   * Returns the associated set as string.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-value

   *

   * @return {string} Token set as string.

   */

  get value() {

    return this._currentValue;

  }

  /**

   * Replaces the associated set with a new string value.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-value

   *

   * @param {string} value New token set as string.

   */

  set value(value) {

    value = String(value);

    this._currentValue = this._valueAsArray.join(' ');

  }

  /**

   * Returns the number of tokens.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-length

   *

   * @return {number} Number of tokens.

   */

  get length() {

    return this._valueAsArray.length;

  }

  /**

   * Returns the stringified form of the TokenList.

   *

   * @see https://dom.spec.whatwg.org/#DOMTokenList-stringification-behavior

   * @see https://www.ecma-international.org/ecma-262/9.0/index.html#sec-tostring

   *

   * @return {string} Token set as string.

   */

  toString() {

    return this.value;

  }

  /**

   * Returns an iterator for the TokenList, iterating items of the set.

   *

   * @see https://dom.spec.whatwg.org/#domtokenlist

   *

   * @return {IterableIterator<string>} TokenList iterator.

   */

  *[Symbol.iterator]() {

    return yield* this._valueAsArray;

  }

  /**

   * Returns the token with index `index`.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-item

   *

   * @param {number} index Index at which to return token.

   *

   * @return {string|undefined} Token at index.

   */

  item(index) {

    return this._valueAsArray[index];

  }

  /**

   * Returns true if `token` is present, and false otherwise.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-contains

   *

   * @param {string} item Token to test.

   *

   * @return {boolean} Whether token is present.

   */

  contains(item) {

    return this._valueAsArray.indexOf(item) !== -1;

  }

  /**

   * Adds all arguments passed, except those already present.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-add

   *

   * @param {...string} items Items to add.

   */

    this.value += ' ' + items.join(' ');

  }

  /**

   * Removes arguments passed, if they are present.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-remove

   *

   * @param {...string} items Items to remove.

   */

  }

  /**

   * If `force` is not given, "toggles" `token`, removing it if it’s present

   * and adding it if it’s not present. If `force` is true, adds token (same

   * as add()). If force is false, removes token (same as remove()). Returns

   * true if `token` is now present, and false otherwise.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-toggle

   *

   * @param {string}  token   Token to toggle.

   * @param {boolean} [force] Presence to force.

   *

   * @return {boolean} Whether token is present after toggle.

   */

  toggle(token, force) {

    if (undefined === force) {

      force = !this.contains(token);

    }

    if (force) {

      this.add(token);

    } else {

      this.remove(token);

    }

    return force;

  }

  /**

   * Replaces `token` with `newToken`. Returns true if `token` was replaced

   * with `newToken`, and false otherwise.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-replace

   *

   * @param {string} token    Token to replace with `newToken`.

   * @param {string} newToken Token to use in place of `token`.

   *

   * @return {boolean} Whether replacement occurred.

   */

  replace(token, newToken) {

    if (!this.contains(token)) {

      return false;

    }

    this.remove(token);

    this.add(newToken);

    return true;

  }

  /**

   * Returns true if `token` is in the associated attribute’s supported

   * tokens. Returns false otherwise.

   *

   * Always returns `true` in this implementation.

   *

   * @see https://dom.spec.whatwg.org/#dom-domtokenlist-supports

   *

   * @return {boolean} Whether token is supported.

   */

  supports() {

    return true;

  }

}