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Version: 7.12.0

How to use THEOplayer as a JavaScript module

As of THEOplayer 6.0, THEOplayer can also be used as a JavaScript module. Instead of loading the library through a <script> tag in your HTML, you import it directly from your JavaScript code.

Using JavaScript modules has several advantages:

  • It's easier to manage dependencies per file, rather than maintaining a long list of <script> tags and keeping them in the right order.
  • If multiple JavaScript files import the same module, the module is only loaded once. (On the other hand, multiple <script> tags with the same src attribute will load and execute the script multiple times.)
  • When you use a bundler for your web app, your bundler can more easily understand the dependencies between your files and generate a single output bundle of your entire app.

Additionally, since JavaScript modules are only supported in modern web browsers, THEOplayer can use more modern JavaScript syntax in its JavaScript module (such as async/await). This results in smaller files, which load and execute faster on your viewer's devices.

Note If you need to support older browsers (such as older smart TVs), you should stick with a classic <script> tag. See the getting started guide.

In this article, we will set up a simple web page using JavaScript modules with the THEOplayer SDK on Web. The outcome of this article is the template below.

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>THEOplayer</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" type="text/css" href="/path/to/ui.css" />
  </head>
  <body>
    <div class="theoplayer-container video-js theoplayer-skin vjs-16-9"></div>
    <script type="module">
      import * as THEOplayer from "/path/to/THEOplayer.esm.js";

      let element = document.querySelector(".theoplayer-container");
      let player = new THEOplayer.Player(element, {
        libraryLocation: "/path/to/your-theoplayer-folder/",
        license: "your_license_string"
      });

      player.source = {
        sources: [
          {
            src: "//cdn.theoplayer.com/video/star_wars_episode_vii-the_force_awakens_official_comic-con_2015_reel_(2015)/index.m3u8",
            type: "application/x-mpegurl"
          }
        ]
      };
    </script>
  </body>
</html>

Prerequisites​

See the prerequisites in our getting started guide.

Basic setup​

Now, we're ready to set up THEOplayer on your website. This guide explains how you implement THEOplayer in four steps:

  1. We'll start from a basic HTML file, with no mention of THEOplayer.
  2. In the second step, we'll explain what the THEOplayer library is and how you can include it. We'll do the same for the default THEOplayer UI.
  3. In the third step, we'll describe how you play a video stream through THEOplayer.
  4. In the fourth step, we'll give a final overview.

Step 1: Set up an HTML file​

When THEOplayer is used as a web video player, we will need a web page (i.e. HTML file) to embed THEOplayer and the code.

Note that a THEOplayer SDK license can only be used on whitelisted domains. You configure these domains when you create a THEOplayer Web SDK at https://portal.theoplayer.com.

Let's start with the following HTML file:

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>THEOplayer</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  </head>
  <body>
    <script type="module"></script>
  </body>
</html>

Pay attention to the type="module" attribute on the <script> tag. This informs the browser to execute it as a module, rather than as a classic script. This allows the code inside it to use import and export statements.

Next, we’ll include the THEOplayer SDK.

Step 2: Including the THEOplayer library​

To access the THEOplayer API and default UI, you must first include the THEOplayer library files. The JavaScript library exposes the THEOplayer API and the CSS library contains the default UI.

THEOplayer JavaScript library​

The following line imports the THEOplayer JavaScript library, and gives you access to the THEOplayer API.

<script type="module">
  import * as THEOplayer from "/path/to/THEOplayer.esm.js";
</script>

The path of the import statement is the URI of the THEOplayer library that you wish to use. This could be something like: /path/to/THEOplayer.esm.js, where the URL is a link to your THEOplayer.esm.js file.

You must swap /path/to/ with your CDN URL. For example, if your SDK is hosted on https://example.com/vendor/theoplayer/, then you'd write the following import:

import * as THEOplayer from "https://example.com/vendor/theoplayer/THEOplayer.esm.js";

THEOplayer CSS library​

To use the default THEOplayer UI, you need to reference the THEOplayer CSS library:

<link rel="stylesheet" type="text/css" href="/path/to/ui.css" />

The <link> tag includes a CSS file on a web page. Similar to the JavaScript library, you must swap /path/to/ with your CDN URL.

Next, we’ll create a THEOplayer instance and configure a video stream.

Step 3: The video​

To play a video through the THEOplayer Web SDK, you must:

  1. Create a video player container,
  2. fetch this container through JavaScript,
  3. create a THEOplayer instance associated with that container,
  4. and configure a video stream for this instance.

The snippet below implements these 4 steps.

<div class="theoplayer-container video-js theoplayer-skin vjs-16-9"></div>
<script type="module">
  import * as THEOplayer from "/path/to/THEOplayer.esm.js";

  let element = document.querySelector(".theoplayer-container"); // fetch THEOplayer container div

  let player = new THEOplayer.Player(element, {
    // instantiates video player
    libraryLocation: "/path/to/your-theoplayer-folder/", // references folder containing your THEOplayer library files (theoplayer.p.js, THEOplayer.js, ...)
    license: "your_license_string" // references your THEOplayer SDK license
  });

  // HLS
  player.source = {
    sources: [
      {
        src: "//cdn.theoplayer.com/video/star_wars_episode_vii-the_force_awakens_official_comic-con_2015_reel_(2015)/index.m3u8", // sets HLS source
        type: "application/x-mpegurl" // sets type to HLS
      }
    ]
  };

  // DASH
  // player.source = {
  //     sources : [{
  //         src : '//amssamples.streaming.mediaservices.windows.net/634cd01c-6822-4630-8444-8dd6279f94c6/CaminandesLlamaDrama4K.ism/manifest(format=mpd-time-csf)', // sets DASH source
  //         type : 'application/dash+xml' // sets type to MPEG-DASH
  //     }]
  // };
</script>

Let's break down the above snippet.

Create video player container​

This <div> element creates a video player container.

<div class="theoplayer-container video-js theoplayer-skin vjs-16-9"></div>
  • The theoplayer-container class is used to fetch the container through JavaScript, as demonstrated by the snippet below.
  • The video-js theoplayer-skin vjs-16-9 classes load the default THEOplayer UI. You may omit vjs-16-9 if you don't want a 16:9 container.
let element = document.querySelector(".theoplayer-container");

Create THEOplayer instance​

The snippet below creates a THEOplayer instance for a container with a specific Player Configuration.

let player = new THEOplayer.Player(element, {
  // instantiates video player
  libraryLocation: "/path/to/your-theoplayer-folder/", // references folder containing your THEOplayer library files (theoplayer.p.js, THEOplayer.js, ...)
  license: "your_license_string" // references your THEOplayer SDK license
});

Similar to the JavaScript and CSS library, you must swap out '/path/to/your-theoplayer-folder/' and 'your_license_string'.

For example, if your SDK is hosted on https://example.com/vendor/theoplayer/ and your license string is ABCD1234, then you would instead configure the snippet below:

var player = new THEOplayer.Player(element, {
  libraryLocation: "https://example.com/vendor/theoplayer/",
  license: "ABCD1234"
});

You can read more about configuring the license at the License section.

Configure video stream​

The snippet below configures a HLS video stream for the THEOplayer instance.

player.source = {
  sources: [
    {
      src: "//cdn.theoplayer.com/video/star_wars_episode_vii-the_force_awakens_official_comic-con_2015_reel_(2015)/index.m3u8", // sets HLS source
      type: "application/x-mpegurl" // sets type to HLS
    }
  ]
};

To configure a DASH stream instead, you must set type to 'application/dash+xml' instead of 'application/x-mpegurl', as demonstrated by commented out code in one of the earlier snippets.

In the next step we'll put everything together.

Step 4: The result​

We're done! Here's the complete code again, which you can put on your web server:

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>THEOplayer</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" type="text/css" href="/path/to/ui.css" />
  </head>
  <body>
    <div class="theoplayer-container video-js theoplayer-skin vjs-16-9"></div>
    <script type="module">
      import * as THEOplayer from "/path/to/THEOplayer.esm.js";

      let element = document.querySelector(".theoplayer-container");
      let player = new THEOplayer.Player(element, {
        libraryLocation: "/path/to/your-theoplayer-folder/",
        license: "your_license_string"
      });

      player.source = {
        sources: [
          {
            src: "//cdn.theoplayer.com/video/star_wars_episode_vii-the_force_awakens_official_comic-con_2015_reel_(2015)/index.m3u8",
            type: "application/x-mpegurl"
          }
        ]
      };
    </script>
  </body>
</html>

Next steps​

Ready to learn more?