<div id=”container”>
<iframe src=”https://codepen.io/kanaparty/full/eJYXeZ/”></iframe>
<div>
<button class=”button”>Click me to fullscreen the iframe</button>
</div>
<div class=”info”>You can check keydown event listener when the browser are in fullscreen and press F11 and ESC by console log on developer tools</div
<div class=”error”></div>
</div>
var button = document.querySelector('#container .button');
button.addEventListener('click', fullscreen);
// when you are in fullscreen, ESC and F11 may not be trigger by keydown listener.
// so don't use it to detect exit fullscreen
document.addEventListener('keydown', function (e) {
console.log('key press' + e.keyCode);
});
// detect enter or exit fullscreen mode
document.addEventListener('webkitfullscreenchange', fullscreenChange);
document.addEventListener('mozfullscreenchange', fullscreenChange);
document.addEventListener('fullscreenchange', fullscreenChange);
document.addEventListener('MSFullscreenChange', fullscreenChange);function fullscreen() {
// check if fullscreen mode is available
if (document.fullscreenEnabled ||
document.webkitFullscreenEnabled ||
document.mozFullScreenEnabled ||
document.msFullscreenEnabled) {
// which element will be fullscreen
var iframe = document.querySelector('#container iframe');
// Do fullscreen
if (iframe.requestFullscreen) {
iframe.requestFullscreen();
} else if (iframe.webkitRequestFullscreen) {
iframe.webkitRequestFullscreen();
} else if (iframe.mozRequestFullScreen) {
iframe.mozRequestFullScreen();
} else if (iframe.msRequestFullscreen) {
iframe.msRequestFullscreen();
}
}
else {
document.querySelector('.error').innerHTML = 'Your browser is not supported';
}
}function fullscreenChange() {
if (document.fullscreenEnabled ||
document.webkitIsFullScreen ||
document.mozFullScreen ||
document.msFullscreenElement) {
console.log('enter fullscreen');
}
else {
console.log('exit fullscreen');
}
// force to reload iframe once to prevent the iframe source didn't care about trying to resize the window
// comment this line and you will see
var iframe = document.querySelector('iframe');
iframe.src = iframe.src;
}
