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15 lines
471 B
JavaScript
15 lines
471 B
JavaScript
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/**
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* @author Toru Nagashima <https://github.com/mysticatea>
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*/
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"use strict";
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/**
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* Check whether given two characters are a surrogate pair.
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* @param {number} lead The code of the lead character.
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* @param {number} tail The code of the tail character.
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* @returns {boolean} `true` if the character pair is a surrogate pair.
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*/
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module.exports = function isSurrogatePair(lead, tail) {
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return lead >= 0xD800 && lead < 0xDC00 && tail >= 0xDC00 && tail < 0xE000;
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};
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