allowfullscreen
an HTML attribute for the iframe tag

How to properly implement allowfullscreen in an HTML video?

Answers:

  • To implement the allowfullscreen attribute correctly in an HTML video, you typically use the <iframe> element to include a video from platforms like YouTube or Vimeo, which support fullscreen. However, if you are implementing a native HTML <video> element, different techniques may apply depending on your needs.

    Using <iframe> for External Videos

    When embedding a video from an external source using an <iframe>, you need to include the allowfullscreen attribute to enable fullscreen mode. Here's an example of how you might embed a YouTube video:

    <iframe width="560" height="315" src="https://www.youtube.com/embed/VIDEO_ID" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

    Using the <video> Element

    For HTML5 videos using the <video> element, you don't need an allowfullscreen attribute, but you can enable fullscreen functionality by using the JavaScript Fullscreen API. Here's a sample implementation:

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Video Example</title>
    <style>
        video {
            width: 100%;
            max-width: 600px;
        }
    </style>
</head>
<body>

<video id="myVideo" controls>
    <source src="path/to/your/video.mp4" type="video/mp4">
    Your browser does not support the video tag.
</video>
<button id="fullscreenBtn">Go Fullscreen</button>

<script>
    const video = document.getElementById('myVideo');
    const fullscreenBtn = document.getElementById('fullscreenBtn');

    fullscreenBtn.addEventListener('click', () => {
        if (video.requestFullscreen) {
            video.requestFullscreen();
        } else if (video.webkitRequestFullscreen) { // Safari
            video.webkitRequestFullscreen();
        } else if (video.msRequestFullscreen) { // IE/Edge
            video.msRequestFullscreen();
        }
    });
</script>

</body>
</html>

    Key Points:

    1. Fullscreen for <iframe>: Use the allowfullscreen attribute directly in the <iframe> tag when embedding videos from external platforms.

    2. Fullscreen for <video>: For native HTML5 videos, you will need to implement the functionality using the Fullscreen API through JavaScript.

    3. Browser Compatibility: Always check for compatibility when using the Fullscreen API, as some browsers may have their own vendor-specific methods to trigger fullscreen (like webkit and ms prefixes).

    By following these practices, you can ensure that your embedded videos are set up correctly for fullscreen viewing.

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