is-surrogate-pair.js•471 B
/**
* @author Toru Nagashima <https://github.com/mysticatea>
*/
"use strict";
/**
* 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;
};