47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
if (!String.prototype.startsWith) {
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String.prototype.startsWith = function(search, pos) {
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pos = !pos || pos < 0 ? 0 : +pos;
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return this.substring(pos, pos + search.length) === search;
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};
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}
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if (!String.prototype.endsWith) {
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String.prototype.endsWith = function(search, this_len) {
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if (this_len === undefined || this_len > this.length) {
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this_len = this.length;
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}
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return this.substring(this_len - search.length, this_len) === search;
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};
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}
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if (!Object.assign) {
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Object.defineProperty(Object, 'assign', {
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enumerable: false,
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configurable: true,
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writable: true,
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value: function(target, firstSource) {
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'use strict';
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if (target === undefined || target === null) {
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throw new TypeError('Cannot convert first argument to object');
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}
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var to = Object(target);
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for (var i = 1; i < arguments.length; i++) {
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var nextSource = arguments[i];
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if (nextSource === undefined || nextSource === null) {
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continue;
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}
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var keysArray = Object.keys(Object(nextSource));
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for (var nextIndex = 0, len = keysArray.length; nextIndex < len; nextIndex++) {
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var nextKey = keysArray[nextIndex];
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var desc = Object.getOwnPropertyDescriptor(nextSource, nextKey);
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if (desc !== undefined && desc.enumerable) {
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to[nextKey] = nextSource[nextKey];
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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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});
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} |