@mucfe/matui/lib/utils/resize-event.js

基于Vue和ElementUi的PC组件库

"use strict";

exports.__esModule = true;
exports.removeResizeListener = exports.addResizeListener = void 0;

var _resizeObserverPolyfill = _interopRequireDefault(require("resize-observer-polyfill"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _createForOfIteratorHelperLoose(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (it) return (it = it.call(o)).next.bind(it); if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(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 _arrayLikeToArray(o, minLen); }

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; }

var isServer = typeof window === 'undefined';
/* istanbul ignore next */

var resizeHandler = function resizeHandler(entries) {
  for (var _iterator = _createForOfIteratorHelperLoose(entries), _step; !(_step = _iterator()).done;) {
    var entry = _step.value;
    var listeners = entry.target.__resizeListeners__ || [];

    if (listeners.length) {
      listeners.forEach(function (fn) {
        fn();
      });
    }
  }
};
/* istanbul ignore next */


var addResizeListener = function addResizeListener(element, fn) {
  if (isServer) return;

  if (!element.__resizeListeners__) {
    element.__resizeListeners__ = [];
    element.__ro__ = new _resizeObserverPolyfill.default(resizeHandler);

    element.__ro__.observe(element);
  }

  element.__resizeListeners__.push(fn);
};
/* istanbul ignore next */


exports.addResizeListener = addResizeListener;

var removeResizeListener = function removeResizeListener(element, fn) {
  if (!element || !element.__resizeListeners__) return;

  element.__resizeListeners__.splice(element.__resizeListeners__.indexOf(fn), 1);

  if (!element.__resizeListeners__.length) {
    element.__ro__.disconnect();
  }
};

exports.removeResizeListener = removeResizeListener;