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:
631 bytes
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| [d565449] | 1 | 'use strict';
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| 2 |
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| 3 | var CodePointAt = require('./CodePointAt');
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| 4 |
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| 5 | var $TypeError = require('es-errors/type');
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| 6 |
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| 7 | // https://262.ecma-international.org/14.0/#sec-isstringwellformedunicode
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| 8 |
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| 9 | module.exports = function IsStringWellFormedUnicode(string) {
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| 10 | if (typeof string !== 'string') {
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| 11 | throw new $TypeError('Assertion failed: `string` must be a String');
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| 12 | }
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| 13 | var len = string.length; // step 1
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| 14 | var k = 0; // step 2
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| 15 | while (k < len) { // step 3
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| 16 | var cp = CodePointAt(string, k); // step 3.a
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| 17 | if (cp['[[IsUnpairedSurrogate]]']) {
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| 18 | return false; // step 3.b
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| 19 | }
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| 20 | k += cp['[[CodeUnitCount]]']; // step 3.c
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| 21 | }
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| 22 | return true; // step 4
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| 23 | };
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