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Copy pathpolyfills.js
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127 lines (111 loc) · 3.67 KB
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// Polyfill for old browsers
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray
if (!Array.isArray) {
Array.isArray = function(arg) {
return Object.prototype.toString.call(arg) === '[object Array]';
};
}
if (typeof Promise === 'undefined') {
ES6Promise.polyfill();
}
// ES5 Polyfills
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
if (!Function.prototype.bind) {
Function.prototype.bind = function(oThis) {
if (typeof this !== 'function') {
throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
}
var aArgs = Array.prototype.slice.call(arguments, 1);
var fToBind = this;
var NoOp = function() {
};
var fBound = function() {
return fToBind.apply(this instanceof NoOp && oThis ? this : oThis,
aArgs.concat(Array.prototype.slice.call(arguments)));
};
NoOp.prototype = this.prototype;
fBound.prototype = new NoOp();
return fBound;
};
}
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
if (!Array.prototype.map) {
Array.prototype.map = function(callback, thisArg) {
if (this === void 0 || this === null) {
throw new TypeError('this is null or not defined');
}
var O = Object(this);
var len = O.length >>> 0;
var T;
if (typeof callback !== 'function') {
throw new TypeError(callback + ' is not a function');
}
if (arguments.length > 1) {
T = thisArg;
}
var A = new Array(len);
var k = 0;
while (k < len) {
var kValue;
var mappedValue;
if (k in O) {
kValue = O[k];
mappedValue = callback.call(T, kValue, k, O);
A[k] = mappedValue;
}
k++;
}
return A;
};
}
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter
if (!Array.prototype.filter) {
Array.prototype.filter = function(callback/*, thisArg*/) {
if (this === void 0 || this === null) {
throw new TypeError('this is null or not defined');
}
var t = Object(this);
var len = t.length >>> 0;
if (typeof callback !== 'function') {
throw new TypeError(callback + ' is not a function');
}
var res = [];
var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
for (var i = 0; i < len; i++) {
if (i in t) {
var val = t[i];
if (callback.call(thisArg, val, i, t)) {
res.push(val);
}
}
}
return res;
};
}
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
if (!Array.prototype.forEach) {
Array.prototype.forEach = function(callback, thisArg) {
var T;
var k;
if (this === null || this === undefined) {
throw new TypeError(' this is null or not defined');
}
var O = Object(this);
var len = O.length >>> 0;
if (typeof callback !== 'function') {
throw new TypeError(callback + ' is not a function');
}
if (arguments.length > 1) {
T = thisArg;
}
k = 0;
while (k < len) {
var kValue;
if (k in O) {
kValue = O[k];
callback.call(T, kValue, k, O);
}
k++;
}
};
}