JS Conter

Counter with Closure

by souras

HTML

<p>Counting with a local variable.</p>
<button type="button" onclick="myFunction()">Count!</button>
<p id="demo">0</p>

JavaScript

function myFunction(){
    document.getElementById("demo").innerHTML = add();
}

var add = (function () {
    var counter = 0;
    return function () {return counter += 1;}
})();