is-cjk-hanzi/src/isCJKHanzi.ts

Whether a character is a (single) cjk hanzi

import XRegExp from '@gerhobbelt/xregexp';

/**
 * Returns true if the text contains valid CJK characters.
 */
function isCJKHanzi(text: string) {
  XRegExp.install('astral');
  return XRegExp(
    '\\p{InCJK_Unified_Ideographs}|\\p{InCJK_Unified_Ideographs_Extension_A}|\\p{InCJK_Unified_Ideographs_Extension_B}|\\p{InCJK_Unified_Ideographs_Extension_C}|\\p{InCJK_Unified_Ideographs_Extension_D}|\\p{InCJK_Unified_Ideographs_Extension_E}'
  ).test(text);
}

export default isCJKHanzi;