From https://stackoverflow.com/questions/5515869/string-length-in-bytes-in-javascript - Cacher Snippet

5/23/2017 - 9:21 AM

From https://stackoverflow.com/questions/5515869/string-length-in-bytes-in-javascript

From https://stackoverflow.com/questions/5515869/string-length-in-bytes-in-javascript

string-bytes.js

function byteLength(str) {
  // returns the byte length of an utf8 string
  var s = str.length;
  for (var i=str.length-1; i>=0; i--) {
    var code = str.charCodeAt(i);
    if (code > 0x7f && code <= 0x7ff) s++;
    else if (code > 0x7ff && code <= 0xffff) s+=2;
    if (code >= 0xDC00 && code <= 0xDFFF) i--; //trail surrogate
  }
  return s;
}