How do I make a div full screen?

html

fullscreen-api

responsive-design

css

byAlex Kataev·Aug 4, 2024

Turn your div into a chameleonic box with a simple CSS class. Stretch it to fill the entire screen with position: fixed; and set every edge to 0. Capture the top layer with z-index: 100;. Here's the nifty CSS spell:

.fullscreen {
    position: fixed;
    top: 0; right: 0; bottom: 0; left: 0;
    z-index: 100;
}

Slap the fullscreen class onto your div like this:

<div class="fullscreen"></div>

This quick and easy way to go fullscreen doesn't involve the Fullscreen API, but it might be necessary for a more interactive and immersive experience.

Pro tips and tricks for full screening

Want to turn your div into the main star of the screen like a boastful peacock? Use the HTML5 Fullscreen API. This allows an architectural transformation, turning a minor element into a monument.

Leverage Fullscreen API

This code sets up a toggle that turns your full-screen dreams into reality (Magic wand not included).

// Function: your personal genie to grant fullscreen wishes.
// A slight rub on the screen, and voila!
function toggleFullScreen(elem) {
    // Checking if the door to fullscreen mode is locked
    if (!document.fullscreenElement) {
        if (elem.requestFullscreen) {
            elem.requestFullscreen();    // Open sesame!
        } // Remember the forgotten words for aged browsers.
    } else {
        if (document.exitFullscreen) {
            document.exitFullscreen();  // Get me out of here!
        } // Ancient browsers might need a different magic phrase.
    }
}

// Summon the genie with a click on the magic button
document.getElementById('myButton').addEventListener('click', function() {
    toggleFullScreen(document.getElementById('myDiv'));
});

Responsive elements

Ensure your div is fluent in all screen languages. Time to dynamically resize and respond to the changing whims of viewport sizes. The key? A magical duo: JavaScript and CSS media queries.

Troubleshooting browser blunders

Check browser compatibility to make sure every browser can appreciate your div in its full-screen glory. Note that the fancy Fullscreen API prefers the secure company of HTTPS. And be ready to wrestle with some Android 4.3 and below dragons.

Style like a pro

When your div takes the entire stage, it should look its best. Apply some CSS magic like border, border-radius, and padding. Just like a suit of armour for your full-screen div.

Deep dive: From concept to deployment

Knight in shining dimensions

Turn your div into a gallant knight riding straight from <body>. Use position: absolute if your div isn't a direct child of <body>. This ensures that your div is positioned at 0,0 coordinates, covering the full screen like a knight's cloak.

.fullscreen-div {
    position: absolute; /* True to its honor, stays in position! */
    top: 0; left: 0; bottom: 0; right: 0; /* Reaching the edges of the kingdom */
    width: 100%; height: 100%; /* The knight's code: Full coverage */
    z-index: 9999; /* Resting at the top, above all trivial elements */
}

Responsive interactivity

Make your div like clay - able to transform, resize, and adapt to its container as it switches from normal to full-screen mode. Use JavaScript for this shape-shifting magic!

Styling for divs on the red carpet

Define the regal attire for your div in full-screen with :fullscreen selector. Be mindful of the margins and paddings, after all, presentation is everything.

Consensual fullscreen

Ensure that your user always has the exit door in sight. Provide an easy way to exit full-screen mode, usually the "Esc" key. Remember, the king rules, but the subjects have the power!

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