allowfullscreen
an HTML attribute for the iframe tag

How to enable fullscreen mode using allowfullscreen?

Answers:

  • To enable fullscreen mode for an embedded element like an <iframe>, you use the allowfullscreen attribute. This attribute lets the browser know that the embedded content is permitted to be displayed in fullscreen mode.

    Here's how to do it properly with an example:

    Example of Using allowfullscreen with <iframe>

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Fullscreen Example</title>
</head>
<body>

<h1>Video in Fullscreen Example</h1>

<iframe 
    width="560" 
    height="315" 
    src="https://www.youtube.com/embed/exampleVideoId" 
    frameborder="0" 
    allow="autoplay; encrypted-media" 
    allowfullscreen>
</iframe>

</body>
</html>

    Key Points:

    1. Include allowfullscreen: By adding allowfullscreen to the <iframe> tag, you're enabling fullscreen for that particular frame.

    2. src Attribute: Replace https://www.youtube.com/embed/exampleVideoId with the URL of the content you want to embed.

    3. Permissions: You can also use the allow attribute to enable additional features. In this example, allow="autoplay; encrypted-media" are permissions for autoplaying and playing encrypted media.

    Other Elements

    If you're using other HTML elements that support fullscreen mode, the same principle applies. For instance, you can enable fullscreen on other media elements (like <video> elements) by using the requestFullscreen() method in JavaScript.

    Example with JavaScript to Request Fullscreen

    <video controls id="myVideo" width="560" height="315" allowfullscreen>
    <source src="video.mp4" type="video/mp4">
    Your browser does not support the video tag.
</video>
<button onclick="openFullscreen()">Fullscreen</button>

<script>
function openFullscreen() {
    var video = document.getElementById("myVideo");
    if (video.requestFullscreen) {
        video.requestFullscreen();
    } else if (video.mozRequestFullScreen) { // Firefox
        video.mozRequestFullScreen();
    } else if (video.webkitRequestFullscreen) { // Chrome, Safari, and Opera
        video.webkitRequestFullscreen();
    } else if (video.msRequestFullscreen) { // IE/Edge
        video.msRequestFullscreen();
    }
}
</script>

    In summary, the allowfullscreen attribute is essential for enabling fullscreen mode on iframes, and you can also pair it with JavaScript methods for other interactive media elements to provide a fullscreen experience.

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