How to get the string length in bytes in nodejs?

Question

How to get the string length in bytes in nodejs? If I have a string, like this: äáöü then str.length will return with 4. But how to get that, how many bytes form th

Answer 1

function getBytes(string){
  return Buffer.byteLength(string, 'utf8')
}

Answer 2

If you want to specific encoded, here is iconv example

  var iconv = require('iconv-lite');
  var buf =iconv.encode('äáöü', 'utf8');
  console.log(buf.length);
  // output: 8

Answer 3

Alternatively, you can use TextEncoder

new TextEncoder().encode(str).length

Related question

Assume it's slower though

Answer 4

Here is an example:

str = 'äáöü';

console.log(str + ": " + str.length + " characters, " +
  Buffer.byteLength(str, 'utf8') + " bytes");

// äáöü: 4 characters, 8 bytes

Buffer.byteLength(string, [encoding])