正确返回Unicode码点大于0xFFFF的字符串长度

如下：

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

 

转载于:https://www.cnblogs.com/zeng-zhi/p/10167692.html