JavaScript String To Unicode/Unicode To String

str-to-unicode.js

/**
 * string to unicode
 */
const strToUnicode = (str) => {
  return Array.from(str)
    .map((char) => {
      const codePoint = char.codePointAt(0);

      // For code points less than 0xFFFF, use `padStart` to ensure that 
      // the code point is at least four characters in length, and pad with zeros at the front.
      return codePoint > 0xffff ? `\\u{${codePoint.toString(16)}}` : `\\u${codePoint.toString(16).padStart(4, '0')}`;
    })
    .join('');
};

/**
 * unicode to string
 */
const unicodeToStr = (unicodeStr) => {
  return unicodeStr.replace(/\\u[0-9a-fA-F]{4}/g, (match) => {
    return String.fromCodePoint(parseInt(match.replace(/\\u/, ''), 16));
  });
};