How to use

STYLE_FIRST_LETTER

function

in

pinyin

static isValidNameHint(nameHint, userName) {
  const pinyinRaw = pinyin(userName, {
   style: pinyin.STYLE_FIRST_LETTER,
  });

  let pinyinName = '';
  for (const py of pinyinRaw) {
   if (py[0] && py[0] !== ' ') {
    pinyinName += py[0];
   }
  }

  const nameRe = new RegExp(nameHint[1], 'ig');
  return nameRe.test(userName) || nameRe.test(pinyinName);
 }