1. function getByteLen(val) {
    2.   let len = 0
    3.   for (let i = 0; i < val.length; i++) {
    4.     let a = val.charAt(i)
    5.     if (a.match(/[^\x00-\xff]/gi) != null) {
    6.       len += 2
    7.     } else {
    8.       len += 1
    9.     }
    10.   }
    11.   return len
    12. }