Last change
on this file since 8d391a1 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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[6a3a178] | 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var toObject = require('../internals/to-object');
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| 4 | var toLength = require('../internals/to-length');
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| 5 | var toInteger = require('../internals/to-integer');
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| 6 | var addToUnscopables = require('../internals/add-to-unscopables');
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| 7 |
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| 8 | // `Array.prototype.at` method
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| 9 | // https://github.com/tc39/proposal-relative-indexing-method
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| 10 | $({ target: 'Array', proto: true }, {
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| 11 | at: function at(index) {
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| 12 | var O = toObject(this);
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| 13 | var len = toLength(O.length);
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| 14 | var relativeIndex = toInteger(index);
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| 15 | var k = relativeIndex >= 0 ? relativeIndex : len + relativeIndex;
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| 16 | return (k < 0 || k >= len) ? undefined : O[k];
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| 17 | }
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| 18 | });
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| 19 |
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| 20 | addToUnscopables('at');
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