45 lines
1.5 KiB
JavaScript
45 lines
1.5 KiB
JavaScript
/*
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* Polyfills used to provide modern JS features on older browsers that do not natively support them
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*/
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/**
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* Copy all enumerable own properties from one or more source objects to a target object
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*
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* As per https://developer.mozilla.org/en-US/docs/MDN/About#Copyrights_and_licenses this code is in the public domain:
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* "Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/"
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*
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* @param {object} target Target object
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* @param {object} varArgs One or more source objects
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*
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* @return {object} Returns the target object
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*/
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if (typeof Object.assign !== 'function') {
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// Must be writable: true, enumerable: false, configurable: true
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Object.defineProperty(Object, "assign", {
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value: function assign(target, varArgs) { // .length of function is 2
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'use strict';
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if (target === null || target === undefined) {
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throw new TypeError('Cannot convert undefined or null to object');
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}
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var to = Object(target);
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for (var index = 1; index < arguments.length; index++) {
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var nextSource = arguments[index];
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if (nextSource !== null && nextSource !== undefined) {
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for (var nextKey in nextSource) {
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// Avoid bugs when hasOwnProperty is shadowed
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if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
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to[nextKey] = nextSource[nextKey];
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}
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}
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}
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}
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return to;
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},
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writable: true,
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configurable: true
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});
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} |