/** | |
* @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; | |
}; |