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20 lines
572 B
20 lines
572 B
'use strict';
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var $TypeError = require('es-errors/type');
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var SameValue = require('./SameValue');
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var ToNumber = require('./ToNumber');
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var ToString = require('./ToString');
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// https://262.ecma-international.org/6.0/#sec-canonicalnumericindexstring
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module.exports = function CanonicalNumericIndexString(argument) {
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if (typeof argument !== 'string') {
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throw new $TypeError('Assertion failed: `argument` must be a String');
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}
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if (argument === '-0') { return -0; }
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var n = ToNumber(argument);
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if (SameValue(ToString(n), argument)) { return n; }
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return void 0;
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};
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