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Editing: es.array.reduce.js
'use strict'; var $ = require('../internals/export'); var $reduce = require('../internals/array-reduce').left; var arrayMethodIsStrict = require('../internals/array-method-is-strict'); var CHROME_VERSION = require('../internals/engine-v8-version'); var IS_NODE = require('../internals/engine-is-node'); var STRICT_METHOD = arrayMethodIsStrict('reduce'); // Chrome 80-82 has a critical bug // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982 var CHROME_BUG = !IS_NODE && CHROME_VERSION > 79 && CHROME_VERSION < 83; // `Array.prototype.reduce` method // https://tc39.es/ecma262/#sec-array.prototype.reduce $({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, { reduce: function reduce(callbackfn /* , initialValue */) { var length = arguments.length; return $reduce(this, callbackfn, length, length > 1 ? arguments[1] : undefined); } });
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