Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="mycheckbox1" checked data-test>
<input type="checkbox" id="mycheckbox2">

JavaScript

var cb1 = document.getElementById("mycheckbox1");
window.alert("1. checked = " + cb1.checked);
window.alert("1. data-test = " + (cb1.dataset.test ? "true" : "false"));
window.alert("1. data-test exists = " + (cb1.dataset.test !== undefined ? "true" : "false"));
var cb2 = document.getElementById("mycheckbox2");
window.alert("2. checked = " + cb2.checked);
window.alert("2. data-test = " + (cb2.dataset.test ? "true" : "false"));
window.alert("2. data-test exists = " + (cb2.dataset.test !== undefined ? "true" : "false"));

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JSFiddle - React, Tailwind, and code Playground

HTML

JavaScript

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Join the 4+ million users, and keep the JSFiddle dream alive.

Ad-free

Use pre-released features

Fiddle collections

Private collections and fiddles

Console