JSFiddle - React, Tailwind, and code Playground

by mrmamen

HTML

<a href="asd">link</a><br>
<input type="checkbox" /> Checkbox 1<br>
<input type="checkbox" /> Checkbox 2<br>  
<input type="checkbox" /> Checkbox 3<br> 
<div id="output">Output</div>
<button type="button">Count checked</button>

JavaScript

$("button").click(function(){
    var l = $("input:checked").length;
    $("#output").text(l);
});