main
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Last change
on this file since d565449 was d565449, checked in by stefan toskovski <stefantoska84@…>, 4 weeks ago |
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Update repo after prototype presentation
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Property mode
set to
100644
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File size:
620 bytes
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| [d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var $RangeError = require('es-errors/range');
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| 4 |
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| 5 | var ToInteger = require('./ToInteger');
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| 6 | var ToLength = require('./ToLength');
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| 7 | var SameValueZero = require('./SameValueZero');
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| 8 |
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| 9 | // https://262.ecma-international.org/8.0/#sec-toindex
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| 10 |
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| 11 | module.exports = function ToIndex(value) {
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| 12 | if (typeof value === 'undefined') {
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| 13 | return 0;
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| 14 | }
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| 15 | var integerIndex = ToInteger(value);
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| 16 | if (integerIndex < 0) {
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| 17 | throw new $RangeError('index must be >= 0');
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| 18 | }
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| 19 | var index = ToLength(integerIndex);
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| 20 | if (!SameValueZero(integerIndex, index)) {
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| 21 | throw new $RangeError('index must be >= 0 and < 2 ** 53 - 1');
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| 22 | }
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| 23 | return index;
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| 24 | };
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