📺 youtube-background

Create video backgrounds from a YouTube, Vimeo or video file links.

⚠️ Future development will be moved to stamat/video-backgrounds. Support will still be provided for this repo.

DEMO HERE ➡️

This project started as a simple 100 liner jQuery plugin for YouTube video backgrounds. The idea behind it was to have a straightforward minimal way to add a YouTube video as a background for a div, or any other HTML element. It was intended to be used on hero and banner elements mostly. You would add a data attribute data-vbg to the element, and the script would take care of the rest, no CSS required.

Vanilla

    <div data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    <script type="text/javascript">
        const videoBackgrounds = new VideoBackgrounds('[data-vbg]');
    </script>

jQuery

    <div data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    <script type="text/javascript">
        jQuery(document).ready(function() {
            jQuery('[data-vbg]').youtube_background();

            const videoBackgrounds = VIDEO_BACKGROUNDS;
        });
    </script>

Since it's creation it has evolved to support Vimeo and video files as well. Numerous features were added out of necessity on other projects or by community requests.

After numerous iterations and is now a fully fledged ES module that can be used with or without jQuery. It is also available as a standalone script.

Features

• No CSS required - the script takes care of everything
• YouTube, Vimeo and video files support
• jQuery plugin and ESM module
• Lazyloading - lazyload the iframe/video
• YouTube and Vimeo cookies are disabled by default
• YouTube and Vimeo player API scrips are loaded only when needed

Installation

As a ESM module

To install the package from NPM run:

npm install youtube-background

Then import the script just like any other ESM module (if your bundler supports resolving node_modules, your import will look like this, otherwise you'll have to provide the full path to the script):

import 'youtube-background';

If you are using a bundler and you wish to use this script as a jQuery plugin, don't forget to import jQuery too.

Over CDN

<script type="text/javascript" src="https://unpkg.com/youtube-background/jquery.youtube-background.js"></script>

or minified:

<script type="text/javascript" src="https://unpkg.com/youtube-background/jquery.youtube-background.min.js"></script>

Usage

There are two ways to use this script: vanilla implementation or as a jQuery plugin.

Vanilla Way

As of version 1.0.6 jQuery is no longer a dependency, but purely optional. To initialize video backgrounds without jQuery use the global class: new VideoBackgrounds('[data-vbg]');.

    <div data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    import VideoBackgrounds from 'youtube-background'; // or if you are loading it from CDN as a standalone script, you can use the global variable `VideoBackgrounds`

    const videoBackgrounds = new VideoBackgrounds('[data-vbg]');

VideoBackgrounds is a factory class - this means that it is used to create and index multiple instances of the video backgrounds depending on the link type: YouTube, Vimeo or video file. It accepts a selector as a parameter and properties object that will be applied to all of the instances queried by the selector. For the list of available properties, please refer to the Properties section.

In order to programmatically add a new element to the factory instance and initialize the video background, for instance on an async event. You can use the add function of the factory instance, which accepts the element object and the optional properties object. For the list of available properties, please refer to the Properties section.

    // get the first element
    const firstElement = document.querySelector('[data-vbg]');

    // add the element to the factory instance
    videoBackgrounds.add(firstElement);

In order to automatically initialize video backgrounds on all elements that match the selector as they appear in the DOM, you will have to implement MutationObserver manually.

The factory instance also indexes all of the individual video background instances by generated UID in it's property index, so you can access them later on if you need to.

UID is assigned to all target elements as a data-vbg-uid attribute when the video background is initialized. You can get the instance of the element by using a get function of the factory instance, which accepts the UID string or element object with UID attribute.

    // get the first element
    const firstElement = document.querySelector('[data-vbg]');

    // get the first instance instance by UID
    const firstInstance = videoBackgrounds.get(firstElement);

You can programmatically control the video playing in the background regardless of the provider and access all of it's properties via the instance object.

    // true if the video is playing, false if the video is not playing
    console.log(firstInstance.playing);

    // true if video is muted, false if video is not muted
    console.log(firstInstance.muted);

    // true if the video is intersecting the viewport, false if the video is not intersecting the viewport.
    console.log(firstInstance.isIntersecting); 

    // current state of the video
    console.log(firstInstance.currentState);

    // current time of the video in seconds
    console.log(firstInstance.currentTime);

    // percentage of the video that has been played
    console.log(firstInstance.percentComplete);

    // the element that the video background is attached to. `firstElement` from the above example
    console.log(firstInstance.element);

    // the element of the video player, meaning either an iframe in case of YouTube and Vimeo, or a video element
    console.log(firstInstance.playerElement); 

    // the video player object, meaning either a YouTube or Vimeo player object, or a video element in case of HTML5 video
    console.log(firstInstance.player);

    // the type of the video, can be `youtube`, `vimeo` or `video`
    console.log(firstInstance.type)

    // volume of the video from 0 to 1
    console.log(firstInstance.volume);

    // play the video
    firstInstance.play();

    // pause the video
    firstInstance.pause();

    // mute the video
    firstInstance.mute();

    // unmute the video
    firstInstance.unmute();

    // set the video source
    firstInstance.setSource('https://www.youtube.com/watch?v=eEpEeyqGlxA');

    // set the video volume
    firstInstance.setVolume(0.5);

    // volume of the video from 0 to 1, or in case of Vimeo a promise that resolves to the volume value
    firstInstance.getVolume(); 

    // seek the video to a specific percentage complete
    firstInstance.seek(25);

    // seek the video to a specific time in seconds
    firstInstance.seekTo(1.25);

    // set Start At seconds
    firstInstance.setStartAt(10);

    // set End At in seconds
    firstInstance.setEndAt(20);

If you wish to tune to the videos events, you can add listeners to the element that you've initialized the video background on. In event.detail you will get the instance object of the video background. Do refer to the Events section for the list of all events.

    firstElement.addEventListener('video-background-ready', function(event) {
        console.log('video-background-ready'); // the video instance object
        console.log(event.detail); // the video instance object
    })

In order to destroy the video background instance and revert the element to it's pre-initialization state, you can use the destroy function of the factory instance.

    // destroy the video background by providing the element
    videoBackgrounds.destroy(firstElement);

    // or by providing the instance videoBackground.destroy(firstInstance);

To destroy all the instances in the index you can use destroyAll function of the factory instance.

Factory instance also implements the IntersectionObserver out of the box to keep track of the visible video backgrounds in order to toggle their play/pause state and preserve the bandwidth and improve the performance. You can find the instance of the IntersectionObserver in the intersectionObserver property of the factory instance.

For the resize events, the factory instance implements the ResizeObserver out of the box. You can find the instance of the ResizeObserver in the resizeObserver property of the factory instance. If the resizeObserver is not supported, the factory instance will fallback to the window resize event.

jQuery Way

jQuery is no longer a dependency, but purely optional. To initialize video backgrounds with jQuery use the global function: jQuery('[data-vbg]').youtube_background();.

    <div data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    jQuery(document).ready(function() {
        jQuery('[data-vbg]').youtube_background();
    });

This function does exactly the same thing as if you would initialize the ES6 factory class. It will pass the selected elements and initialize the factory class in the global variable VIDEO_BACKGROUNDS. So everything that applies for the factory instance in the ES6 guide applies to this instance.

    // get the first element
    const firstElement = $('[data-vbg]')[0];

    // get the first instance instance by UID
    const firstInstance = VIDEO_BACKGROUNDS.get(firstElement);

The plugin method accepts properties object as a parameter. For the list of available properties, please refer to the next Properties section.

    jQuery(document).ready(function() {
        jQuery('[data-vbg]').youtube_background({
            'play-button': true
        });
    });

Properties

Noted properties can be added as html attributes as:

• data-vbg-play-button
• data-vbg-mute-button
• data-vbg-autoplay
• data-vbg-muted
• data-vbg-loop
• data-vbg-mobile
• data-vbg-offset
• data-vbg-resolution
• data-vbg-fit-box
• data-vbg-load-background
• data-vbg-poster
• data-vbg-inline-styles
• data-vbg-start-at
• data-vbg-end-at
• data-vbg-always-play
• data-vbg-volume
• data-vbg-no-cookie
• data-vbg-force-on-low-battery
• data-vbg-lazyloading

⚠️ Note: Attribute properties will override the properties passed on initialization. Always.

Example - Properties as HTML attributes

Vanilla

    <div data-vbg-play-button="true" data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    <script type="text/javascript">
        const videoBackgrounds = new VideoBackgrounds('[data-vbg]');
    </script>

jQuery

    <div data-vbg-play-button="true" data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    <script type="text/javascript">
        jQuery(document).ready(function() {
            jQuery('[data-vbg]').youtube_background();
        });
    </script>

Example - Properties as JSON

Vanilla

    <div data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    <script type="text/javascript">
        const videoBackgrounds = new VideoBackgrounds('[data-vbg]', {
            'play-button': true
        });
    </script>

jQuery

    <div data-vbg="https://www.youtube.com/watch?v=eEpEeyqGlxA"></div>

    <script type="text/javascript">
        jQuery(document).ready(function() {
            jQuery('[data-vbg]').youtube_background({
                'play-button': true
            });
        });
    </script>

Events

• video-background-ready - when the video is ready to play, this event is triggered. HTML5 videos are ready to play immediately.
• video-background-time-update - whenever the time of the video changes while video is playing, this event is triggered. The current time is available from the instance variable event.detail.currentTime. On Vimeo and YouTube this event is fired in 250ms intervals.
• video-background-state-change - video changes state. The state is available from the instance variable event.detail.currentState. It can be: notstarted, ended, playing, paused, buffering.
• video-background-play - video starts playing
• video-background-pause - video is paused
• video-background-ended - video ended event. Keep in mind that if loop is set to true the video will start playing from the start after this event.
• video-background-mute - video sound is muted
• video-background-unmute - video sound is unmuted
• video-background-volume-change - video volume is changed. The volume is available from the instance variable event.detail.volume.
• video-background-resize - when the video background is resized, this event is fired.
• video-background-destroyed - when the video background is destroyed using the destroy function of the instance and reverted to pre-initialization state, this event is fired.

Events bubble. If you go vanilla, you can get the video object via event.detail or event.originalEvent.detail in case of jQuery implementation.

You can add listeners to the events onto the element that you've initialized the video background on. If the ID of that element is #video-background, you can add listeners like this:

document.querySelector('#video-background').addEventListener('video-background-ready', function(event) {
    console.log('video-background-ready'); // the video instance object
    console.log(event.detail); // the video instance object
});

or with jQuery:

jQuery('#video-background').on('video-background-ready', function(event) {
    console.log('video-background-ready'); // the video instance object
    console.log(event.originalEvent.detail); // the video instance object
});

Instance Methods

Instance variables

• playing - boolean, true if the video is playing, false if the video is not playing. Hard playing state, doesn't change on video being paused via IntersectionObserver.
• muted - boolean, true if the video is muted, false if the video is not muted.
• isIntersecting - boolean, true if the video is intersecting the viewport, false if the video is not intersecting the viewport.
• currentState - the current state of the video. It can be: notstarted, ended, playing, paused, buffering.
• currentTime - the current time of the video in seconds
• percentComplete - the percentage of the video that has been played
• element - the element that the video background is attached to
• playerElement - the element of the video player, meaning either an iframe in case of YouTube and Vimeo, or a video element
• player - the video player object, meaning either a YouTube or Vimeo player object, or a video element in case of HTML5 video
• type - the type of the video, can be youtube, vimeo or video
• volume - volume of the video from 0 to 1

Factory Instance Methods

Factory Instance Variables

• index - the index of all the instances of the video backgrounds. It is an object with keys being the UID of the element and values being the instance object.
• intersectionObserver - the instance of the IntersectionObserver that is used to track the intersecting video backgrounds.
• resizeObserver - the instance of the ResizeObserver that is used to track the resize events of the video backgrounds. If the ResizeObserver is not supported, the factory instance will fallback to the window resize event.

Browser Support

Minimum supported browsers are both desktop and mobile:

• Chrome 49+
• Firefox 44+
• Safari 10+
• Opera 18+
• Edge 14+

Recommended browsers are both desktop and mobile:

• Chrome 51+
• Firefox 55+
• Safari 12.1+
• Opera 38+
• Edge 17+

Tested with BrowserStack.

Development

Development setup uses POOPS bundler to bundle ES modules into IIFE jquery.youtube-background.js and jquery.youtube-background.min.js

POOPS is a simple bundler + static site builder that I've created, do give it a try and let me know what you think. It's still in early development, but it's already quite useful.

To install the required package for running POOPS, run:

npm install

To run the server on http://localhost:4040, run:

npm run dev

Code will automatically be packaged into IIFE and minified while you develop, and the served page will automatically reload on changes.

To just build the code, without running the local server, run:

npm run build

Code

The code is structured like this:

• main.js - the main entry point of the script. Used to initialize the jQuery plugin.
• video-backgrounds.js - the main entry point of the ES6 module. It contains the factory class VideoBackgrounds that is used to create and index multiple instances of the video backgrounds depending on the link type: YouTube, Vimeo or video file.
• lib/super-video-background.js - It contains the super class SuperVideoBackground with all of the common methods and properties for all of the video background types. This class is inherited by the YouTubeBackground, VimeoBackground and VideoBackground classes.
• lib/youtube-background.js - It contains the YouTubeBackground class that is used to create and control YouTube video backgrounds.Inherits from SuperVideoBackground.
• lib/vimeo-background.js - It contains the VimeoBackground class that is used to create and control Vimeo video backgrounds. Inherits from SuperVideoBackground.
• lib/video-background.js - It contains the VideoBackground class that is used to create and control HTML5 video backgrounds. Inherits from SuperVideoBackground.
• lib/buttons.js - It contains the play and pause automatic buttons and their functionality that are added to the video backgrounds. I seriously don't know why I created this in the first place.
• lib/controls.js - Module containing externalized control classes SeekBar, PlayToggle, MuteToggle which tune onto the video events and use the common API, they are not bundled with the script, but are available as a standalone module exports.

Tu summarize, because YouTube, Vimeo and HTML5 Video API's are different - we need a way to generalize these APIs and provide a common interface for all of them. Due to a lot of common code we have the SuperVideoBackground class that is inherited by the YouTubeBackground, VimeoBackground and VideoBackground classes.

And lastly we have the VideoBackgrounds factory class that is used to create and index multiple instances of the video backgrounds depending on the link type: YouTube, Vimeo or video file and provide a single IntersectionObserver and ResizeObserver for all of the instances.

THE END.