A handy utility to determine if a character or string contains CJK (Chinese, Japanese, Korean) Hanzi/Kanji characters.

npm install is-cjk-hanzi

Some characters are tricky to work with because they are surrogate pairs and have a length of 2.

console.log('𧓈'.length); // 2
isSingleCJKHanzi('𧓈'); // true

const isCJKHanzi = require('is-cjk-hanzi');

isCJKHanzi('我'); // true
isCJKHanzi('詠む'); // true
isCJKHanzi('hello'); // false

// Check for single CJK Hanzi characters
const isSingleCJKHanzi = require('is-cjk-hanzi/isSingleCJKHanzi');

isSingleCJKHanzi('我'); // true
isSingleCJKHanzi('我的'); // false

• isCJKHanzi(inputString)

  • Returns true if the input string contains at least one CJK Hanzi character; false otherwise.

• isSingleCJKHanzi(inputCharacter)

  • Returns true if the input is a single CJK Hanzi character; false otherwise.