<!DOCTYPE html>
<html lang="en-US">
<body>
<img src="apple-products.jpg" alt="apple products" height="250" width="200">
<p>Click on the button to display the image in full-screen. Meanwhile, check your console (Press F12)</p>
<button onclick="myFunction()">Click Me</button>
<script>
var fullScreen = document.fullscreenEnabled || document.webkitFullscreenEnabled || document.mozFullScreenEnabled || document.msFullscreenEnabled;
var elem = document.getElementsByTagName("img")[0];
function fullscreenCheck(){
console.log(document.fullscreenElement);
}
function myFunction(){
if(fullScreen){
elem.requestFullscreen();
setTimeout(fullscreenCheck, 1000);
}
}
</script> </body>
</html>