21 lines
534 B
JavaScript
21 lines
534 B
JavaScript
'use strict';
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var $RangeError = require('es-errors/range');
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var ToIntegerOrInfinity = require('./ToIntegerOrInfinity');
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var MAX_SAFE_INTEGER = require('math-intrinsics/constants/maxSafeInteger');
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// https://262.ecma-international.org/15.0/#sec-toindex
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module.exports = function ToIndex(value) {
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if (typeof value === 'undefined') {
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return 0;
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}
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var integer = ToIntegerOrInfinity(value);
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if (integer < 0 || integer >= MAX_SAFE_INTEGER) {
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throw new $RangeError('index must be >= 0 and < 2 ** 53 - 1');
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}
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return integer;
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};
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