I'm working on a custom video player using the HTML5 video element and I'm having trouble getting the full screen button to work with the Fullscreen API.
When I click it, I get the error message:
Failed to execute 'requestFullscreen' on 'Element': API can only be initiated by a user gesture.
However, I am initiating the call to requestFullscreen with a user gesture... Unless I'm misunderstanding what constitutes a user gesture. A click on an element is a user gesture, isn't it?
I realize that there are a lot of questions about the Fullscreen API on SO, but it looks like many people want to initiate full screen mode without user interaction.
What am I doing wrong?
There is a pen with this code, but I'm likely to change that when I find a solution. I won't change the code here.
Here's the code:
/* Get our elements. */
const player = document.querySelector('.player');
const video = player.querySelector('.viewer');
const progress = player.querySelector('.progress');
const progressBar = player.querySelector('.progress__filled');
const toggle = player.querySelector('.toggle');
const skipButtons = player.querySelectorAll('[data-skip]');
const ranges = player.querySelectorAll('.player__slider');
const fullscreen = player.querySelector('.fullscreen');
let isFullScreen = false;
/* Build our functions */
function togglePlay() {
const action = video.paused ? 'play' : 'pause';
video[action]();
}
function updatePlayIcon() {
toggle.classList.toggle('playing');
}
function skip() {
video.currentTime += parseFloat(this.dataset.skip);
}
function handleRangeUpdate() {
video[this.name] = this.value;
}
function handleProgress() {
const percent = (video.currentTime / video.duration) * 100;
progressBar.style.flexBasis = percent + '%';
}
function scrub(e) {
const seconds = (e.offsetX / progress.offsetWidth) * video.duration;
video.currentTime = seconds;
}
function toggleFullScreen() {
if (isFullScreen) {
console.log("exiting fullscreen");
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.webkitCancelFullScreen) {
document.webkitCancelFullScreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
console.log('removing fullscreen class');
player.classList.remove('fullscreen');
} else {
console.log("entering fullscreen");
if (player.requestFullscreen) {
console.log('requestFullScreen');
player.requestFullscreen(); // standard
} else if (player.webkitRequestFullscreen) {
console.log('webkitRequestFullscreen');
player.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
} else if (player.mozRequestFullScreen) {
console.log('mozRequestFullScreen');
player.mozRequestFullScreen();
} else if (player.msRequestFullscreen) {
console.log('msRequestFullscreen');
player.msRequestFullscreen();
} else {
console.error('Unable to find a fullscreen request method');
}
console.log('adding fullscreen class');
player.classList.add('fullscreen');
}
isFullScreen = !isFullScreen;
}
/* Hook up the event listeners */
video.addEventListener('click', togglePlay);
toggle.addEventListener('click', togglePlay);
video.addEventListener('play', updatePlayIcon);
video.addEventListener('pause', updatePlayIcon);
video.addEventListener('timeupdate', handleProgress);
skipButtons.forEach(button => button.addEventListener('click', skip));
ranges.forEach(range => range.addEventListener('change', handleRangeUpdate));
ranges.forEach(range => range.addEventListener('mousemove', handleRangeUpdate));
let mousedown = false;
progress.addEventListener('click', scrub);
progress.addEventListener('mousemove', (e) => mousedown && scrub(e));
progress.addEventListener('mousedown', () => mousedown = true);
progress.addEventListener('mouseup', () => mousedown = false);
fullscreen.addEventListener('click', toggleFullScreen);
document.addEventListener('fullscreenchange', toggleFullScreen);
document.addEventListener('mozfullscreenchange', toggleFullScreen);
document.addEventListener('webkitfullscreenchange', toggleFullScreen);
document.addEventListener('msfullscreenchange', toggleFullScreen);html {
box-sizing: border-box;
}
*,
*:before,
*:after {
box-sizing: inherit;
}
html, body {
height: 100%;
}
body {
margin: 0;
display: flex;
background: #7A419B;
background: linear-gradient(135deg, #7c1599 0%, #921099 48%, #7e4ae8 100%);
background-size: cover;
align-items: center;
justify-content: center;
}
.player {
max-width: 750px;
max-height: 100%;
border: 5px solid rgba(0, 0, 0, 0.2);
box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
position: relative;
font-size: 0;
overflow: hidden;
}
button.toggle.fullscreen::before {
font-family: "FontAwesome";
content: "\f065";
}
.player.fullscreen .player__controls .toggle.fullscreen::before {
content: "\f066";
}
/* This css is only applied when fullscreen is active. */
.player.fullscreen {
max-width: none;
max-height: none;
width: 100%;
height: 100%;
background-color: black;
}
.player.fullscreen video {
width: 100%;
}
.player__video {
max-width: 100%;
max-height: 100%;
}
.player__button {
background: none;
border: 0;
line-height: 1;
color: white;
text-align: center;
outline: 0;
padding: 0;
cursor: pointer;
max-width: 50px;
}
.player__button:focus {
border-color: #ffc600;
}
.toggle::before {
font-family: "FontAwesome";
content: "\f04b";
}
.toggle.playing::before {
font-family: "FontAwesome";
content: "\f04c";
}
.player__slider {
width: 10px;
height: 30px;
}
.player__controls {
display: flex;
position: absolute;
bottom: 0;
width: 100%;
transform: translateY(100%) translateY(-5px);
transition: all .3s;
flex-wrap: wrap;
background: rgba(0, 0, 0, 0.1);
}
.player:hover .player__controls {
transform: translateY(0);
}
.player:hover .progress {
height: 15px;
}
.player__controls > * {
flex: 1;
}
.progress {
flex: 10;
position: relative;
display: flex;
flex-basis: 100%;
height: 5px;
transition: height 0.3s;
background: rgba(0, 0, 0, 0.5);
cursor: ew-resize;
}
.progress__filled {
width: 50%;
background: #ffc600;
flex: 0;
flex-basis: 0%;
}
.player__slider {
position: relative;
}
.player__slider::after {
content: attr(name);
position: absolute;
top: -2px;
text-shadow: 1px 1px 1px 0 rgba(0,0,0,0.5);
font-size: 0.8em;
}
/* unholy css to style input type="range" */
input[type=range] {
-webkit-appearance: none;
background: transparent;
width: 100%;
margin: 0 5px;
}
input[type=range]:focus {
outline: none;
}
input[type=range]::-webkit-slider-runnable-track {
width: 100%;
height: 8.4px;
cursor: pointer;
box-shadow: 1px 1px 1px rgba(0, 0, 0, 0), 0 0 1px rgba(13, 13, 13, 0);
background: rgba(255, 255, 255, 0.8);
border-radius: 1.3px;
border: 0.2px solid rgba(1, 1, 1, 0);
}
input[type=range]::-webkit-slider-thumb {
box-shadow: 0 0 0 rgba(0, 0, 0, 0), 0 0 0 rgba(13, 13, 13, 0);
height: 15px;
width: 15px;
border-radius: 50px;
background: #ffc600;
cursor: pointer;
-webkit-appearance: none;
margin-top: -3.5px;
box-shadow: 0 0 2px rgba(0, 0, 0, 0.2);
}
input[type=range]:focus::-wefbkit-slider-runnable-track {
background: #bada55;
}
input[type=range]::-moz-range-track {
width: 100%;
height: 8.4px;
cursor: pointer;
box-shadow: 1px 1px 1px rgba(0, 0, 0, 0), 0 0 1px rgba(13, 13, 13, 0);
background: #ffffff;
border-radius: 1.3px;
border: 0.2px solid rgba(1, 1, 1, 0);
}
input[type=range]::-moz-range-thumb {
box-shadow: 0 0 0 rgba(0, 0, 0, 0), 0 0 0 rgba(13, 13, 13, 0);
height: 15px;
width: 15px;
border-radius: 50px;
background: #ffc600;
cursor: pointer;
}<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<div class="player">
<video class="player__video viewer" src="https://player.vimeo.com/external/194837908.sd.mp4?s=c350076905b78c67f74d7ee39fdb4fef01d12420&profile_id=164"></video>
<div class="player__controls">
<div class="progress">
<div class="progress__filled"></div>
</div>
<button class="player__button toggle" title="Toggle Play"></button>
<input type="range" name="volume" class="player__slider" min="0" max="1" step="0.05" value="1">
<input type="range" name="playbackRate" class="player__slider" min="0.5" max="2" step="0.1" value="1">
<button data-skip="-10" class="player__button"><i class="fa fa-step-backward"></i> 10s</button>
<button data-skip="25" class="player__button">25s <i class="fa fa-step-forward"></i></button>
<button class="player__button toggle fullscreen"></button>
</div>
</div>The problem was that my toggleFullScreen function was being called twice when I clicked on the full screen button. I saw it while I was replying to Bibek Khadka's answer. The first time was when I clicked the button and the second time was when the full-screen mode actually changed because of these event listeners...
document.addEventListener('fullscreenchange', toggleFullScreen);
document.addEventListener('mozfullscreenchange', toggleFullScreen);
document.addEventListener('webkitfullscreenchange', toggleFullScreen);
document.addEventListener('msfullscreenchange', toggleFullScreen);
It would go to fullscreen mode, then back so quick that I didn't see the change. I believe the second time called the Fullscreen API method (technically) without a user gesture and that's why I got the error message.
The solution (for now at least) is to create a separate function for changing classes and the variable I'm using to track whether or not I'm in full screen mode ...
function toggleFullScreenClasses() {
player.classList.toggle('fullscreen');
isFullScreen = !isFullScreen;
}
... then I don't use that to handle the click on the button. I only use it to handle the actual fullscreenchange event...
document.addEventListener('fullscreenchange', toggleFullScreenClasses);
document.addEventListener('mozfullscreenchange', toggleFullScreenClasses);
document.addEventListener('webkitfullscreenchange', toggleFullScreenClasses);
document.addEventListener('msfullscreenchange', toggleFullScreenClasses);
I know this is sloppy, but it solves the problem for now. I previously tried using the :fullscreen pseudo-class, but I had some difficulty and I switched to the more familiar method of toggling classes and variables. I need to take another look at that.