JSFiddle - React, Tailwind, and code Playground

HTML

<a style="cursor:pointer;" onclick="capitaliseFirstLetter('hey wassup baby')">asd</a>

<div type="text" id="texts"></div>

JavaScript

function capitaliseFirstLetter(string)
    {
        var array = string.split(" ");
        for(i=0;i<array.length;i++){
            var n = array[i];
            var a = n.charAt(0).toUpperCase() + n.slice(1);
            alert(a);
        }
        
    }