convert sentence into title case in javascript code example

Example 1: javascript title string

function toTitles(s){ return s.replace(/\w\S*/g, function(t) { return t.charAt(0).toUpperCase() + t.substr(1).toLowerCase(); }); }
var str = toTitles('abraham lincoln'); // Abraham Lincoln

Example 2: snentence case capitalisation js

const string = "tHIS STRING'S CAPITALISATION WILL BE FIXED."
const string = string.charAt(0).toUpperCase() + string.slice(1)