正确返回Unicode码点大于0xFFFF的字符串长度

Posted 2021-01-29 zeng-zhi

如下：

function codePointLength(text){
  var result = text.match(/[sS]/gu);
  return result? result.length:0;
}
var s = ‘????‘; 
s.length //4 
codePointLength(s) //2