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findindex.js
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findindex.js
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/*
* Copyright 2016 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 util/findinternal';
'require util/polyfill';
$jscomp.polyfill('Array.prototype.findIndex', function(orig) {
if (orig) return orig;
/**
* Finds an element that satisfies the given predicate, returning its index.
*
* @this {!IArrayLike<VALUE>}
* @param {function(this: THIS, VALUE, number, !IArrayLike<VALUE>): *}
* callback
* @param {THIS=} opt_thisArg
* @return {number} The found value, or undefined.
* @template VALUE, THIS
* @suppress {reportUnknownTypes}
*/
var polyfill = function(callback, opt_thisArg) {
return $jscomp.findInternal(this, callback, opt_thisArg).i;
};
return polyfill;
}, 'es6', 'es3');