silegismg-editor-articulacao/src/hacks/polyfill.js

Editor de Articulação

/* Copyright 2017 Assembleia Legislativa de Minas Gerais
 * 
 * This file is part of Editor-Articulacao.
 *
 * Editor-Articulacao is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, version 3.
 *
 * Editor-Articulacao is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Editor-Articulacao.  If not, see <http://www.gnu.org/licenses/>.
 */

 function polyfill() {
    // IE 11 não tem Object.assing

    // Object polyfill from https://developer.mozilla.org/en-US/docs/Glossary/Polyfill
    if (!Object.assign) {
        Object.defineProperty(Object, 'assign', {
            enumerable: false,
            configurable: true,
            writable: true,
            value: function (target) {
                'use strict';
                if (target === undefined || target === null) {
                    throw new TypeError('Cannot convert first argument to object');
                }

                var to = Object(target);
                for (var i = 1; i < arguments.length; i++) {
                    var nextSource = arguments[i];
                    if (nextSource === undefined || nextSource === null) {
                        continue;
                    }
                    nextSource = Object(nextSource);

                    var keysArray = Object.keys(Object(nextSource));
                    for (var nextIndex = 0, len = keysArray.length; nextIndex < len; nextIndex++) {
                        var nextKey = keysArray[nextIndex];
                        var desc = Object.getOwnPropertyDescriptor(nextSource, nextKey);
                        if (desc !== undefined && desc.enumerable) {
                            to[nextKey] = nextSource[nextKey];
                        }
                    }
                }
                return to;
            }
        });
    }

    // IE 11 não tem lastElementChild no DocumentFragment
    if (!('lastElementChild' in DocumentFragment.prototype)) {
        Object.defineProperty(DocumentFragment.prototype, 'lastElementChild', {
            get: function () {
                var ultimo = this.lastChild;

                while (ultimo && ultimo.nodeType !== Node.ELEMENT_NODE) {
                    ultimo = ultimo.previousSibling;
                }

                return ultimo;
            }
        });
    }
 }

 export default polyfill;