com.google.javascript.jscomp.js.es6.array.includes.js Maven / Gradle / Ivy
/*
* Copyright 2017 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'require es6/object/is';
'require util/polyfill';
$jscomp.polyfill('Array.prototype.includes', function(orig) {
if (orig) return orig;
/**
* Polyfills Array.prototype.includes.
*
* @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes
*
* @this {!IArrayLike}
* @param {T} searchElement
* @param {number=} opt_fromIndex
* @return {boolean}
* @template T
* @suppress {reportUnknownTypes}
*/
var includes = function(searchElement, opt_fromIndex) {
var array = this;
if (array instanceof String) {
array = /** @type {!IArrayLike} */ (String(array));
}
var len = array.length;
var i = opt_fromIndex || 0;
if (i < 0) {
i = Math.max(i + len, 0);
}
for (; i < len; i++) {
var element = array[i];
if (element === searchElement || Object.is(element, searchElement)) {
return true;
}
}
return false;
};
return includes;
}, 'es7', 'es3');