What is the easier way to convert single string word without spaces into Title case within less code?

Question

I have single string and I want to convert this to title case. JS is not providing built in function.

var difficulty = "easy";  // medium, hard
    difficulty[0].toUpperCase();
    document.write(difficulty)  // It is printing in small. 

Answer 1

If you don't want to repeat the code multiple times, you can add a method to the String prototype, that would allow you to easily reuse the functionality many times

String.prototype.titleCase = function () {
 var sentence = this.toLowerCase().split(" ");
 for(var i = 0; i< sentence.length; i++){
    sentence[i] = sentence[i][0].toUpperCase() + sentence[i].slice(1);
 }
return sentence.join(" ");
}
 
var difficulty = "easy";

document.write(difficulty.titleCase());
document.write("<br/>")
document.write("medium".titleCase());
document.write("<br/>")
document.write("hard".titleCase());

This will also work on words with spaces, so very easy // would give "Very Easy"