JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<div>
<audio></audio>
<canvas></canvas>
<video></video>
<div></div>
</div>

JavaScript

var a = document.getElementsByTagName('audio')[0];
alert(getComputedStyle(a, null).display);
var c = document.getElementsByTagName('canvas')[0];
alert(getComputedStyle(c, null).display);
var v = document.getElementsByTagName('video')[0];
alert(getComputedStyle(v, null).display);
var d = document.getElementsByTagName('div')[0];
alert(getComputedStyle(d, null).display);
var d= document.getElementsByTagName('div')[0];
alert(getComputedStyle(d,null).display);