recoder-code
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15 lines (13 loc) • 471 B
JavaScript
/**
* @author Toru Nagashima <https://github.com/mysticatea>
*/
;
/**
* Check whether given two characters are a surrogate pair.
* @param {number} lead The code of the lead character.
* @param {number} tail The code of the tail character.
* @returns {boolean} `true` if the character pair is a surrogate pair.
*/
module.exports = function isSurrogatePair(lead, tail) {
return lead >= 0xD800 && lead < 0xDC00 && tail >= 0xDC00 && tail < 0xE000;
};