if (!Object.assign) {
|
Object.defineProperty(Object, "assign", {
|
enumerable: false,
|
configurable: true,
|
writable: true,
|
value: function(target, firstSource) {
|
"use strict";
|
if (target === undefined || target === null){
|
console.log(firstSource)
|
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;
|
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;
|
}
|
});
|
}
|
if(!Array.isArray){
|
Object.defineProperty(Array, "isArray", {
|
enumerable: false,
|
configurable: true,
|
writable: true,
|
value: function(target){
|
return Object.prototype.toString.call(target) == "[object Array]";
|
}
|
})
|
}
|
// 兼容ie数组没有findIndex方法
|
if (!Array.prototype.findIndex) {
|
Object.defineProperty(Array.prototype, 'findIndex', {
|
value: function(predicate) {
|
// 1. Let O be ? ToObject(this value).
|
if (this == null) {
|
throw new TypeError('"this" is null or not defined');
|
}
|
|
var o = Object(this);
|
|
// 2. Let len be ? ToLength(? Get(O, "length")).
|
var len = o.length >>> 0;
|
|
// 3. If IsCallable(predicate) is false, throw a TypeError exception.
|
if (typeof predicate !== 'function') {
|
throw new TypeError('predicate must be a function');
|
}
|
|
// 4. If thisArg was supplied, let T be thisArg; else let T be undefined.
|
var thisArg = arguments[1];
|
|
// 5. Let k be 0.
|
var k = 0;
|
|
// 6. Repeat, while k < len
|
while (k < len) {
|
// a. Let Pk be ! ToString(k).
|
// b. Let kValue be ? Get(O, Pk).
|
// c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)).
|
// d. If testResult is true, return k.
|
var kValue = o[k];
|
if (predicate.call(thisArg, kValue, k, o)) {
|
return k;
|
}
|
// e. Increase k by 1.
|
k++;
|
}
|
// 7. Return -1.
|
return -1;
|
}
|
});
|
}
|
