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14 lines
471 B
14 lines
471 B
/** |
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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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