How to get the length of a string in bytes in JavaScript

In this Article we will go through how to get the length of a string in bytes only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function.

Let's define this short function:

const bytes = str => new Blob([str]).size;

bytes('hello world');       // 11
bytes('🎉');                // 4