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Editing: es.array.at.js
'use strict'; var $ = require('../internals/export'); var toObject = require('../internals/to-object'); var lengthOfArrayLike = require('../internals/length-of-array-like'); var toIntegerOrInfinity = require('../internals/to-integer-or-infinity'); var addToUnscopables = require('../internals/add-to-unscopables'); // `Array.prototype.at` method // https://github.com/tc39/proposal-relative-indexing-method $({ target: 'Array', proto: true }, { at: function at(index) { var O = toObject(this); var len = lengthOfArrayLike(O); var relativeIndex = toIntegerOrInfinity(index); var k = relativeIndex >= 0 ? relativeIndex : len + relativeIndex; return (k < 0 || k >= len) ? undefined : O[k]; } }); addToUnscopables('at');
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