How to convert snake_case to camelcase in JavaScript

In this Article we will go through how to convert snake_case to camelcase 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 snakeToCamel = str => str.toLowerCase().replace(/(_\w)/g, m => m.toUpperCase().substr(1));

snakeToCamel('HELLO_world');    // 'helloWorld'