Camelize function for js

camelize.js

function camelize(val) {
  return val.replace (/(?:^|[-_]|\s)(\w)/g, function (_, c, i) {
    return i === 0 ? c.toLowerCase() : c.toUpperCase ();
  })
}

camelize('I like to develop') === 'iLikeToDevelop'; // separate words
camelize('i_like_to_develop') === 'iLikeToDevelop'; // underscore case
camelize('ILikeToDevelop') === 'iLikeToDevelop'; // pascal case
camelize('i_like ToDevelop') === 'iLikeToDevelop'; // mixed