To make HTML elements full screen, you need to call the requestFullscreen() method of the element under triggering the user operation (such as click) and be compatible with browser prefixes such as webkit, moz, and ms; 2. You can exit the full screen through document.exitFullscreen(); 3. You can use the fullscreen pseudo-class to add styles to elements in full screen state, and the API supports limited on mobile terminals, so you need to pay attention to compatibility issues.
To make an HTML element go fullscreen in a web browser, you use the Fullscreen API , which allows you to programmatically make any DOM element take up the entire screen. Here's how to do it properly and safely.
? Using the Fullscreen API
The Fullscreen API provides methods to display an element in fullscreen mode. The key method is requestFullscreen() .
1. Basic Usage
<div id="myElement">
<p>This element will go fullscreen.</p>
<button onclick="goFullscreen()">Go Fullscreen</button>
</div>
<script>
function goFullscreen() {
const elem = document.getElementById("myElement");
if (elem.requestFullscreen) {
elem.requestFullscreen();
} else if (elem.mozRequestFullScreen) { /* Firefox */
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullscreen) { /* Chrome, Safari & Opera */
elem.webkitRequestFullscreen();
} else if (elem.msRequestFullscreen) { /* IE/Edge */
elem.msRequestFullscreen();
}
}
</script>Note : Always call
requestFullscreen()in response to a user action (like a click), otherwise the browser will block it for security reasons.
?? Handle Browser Prefixes (For Compatibility)
Although modern browsers support requestFullscreen without prefixes, older versions require vendor prefixes:
-
requestFullscreen()– Standard -
webkitRequestFullscreen()– Chrome, Safari, newer Opera -
mozRequestFullScreen()– Firefox -
msRequestFullscreen()– IE11 and Edge (Legacy)
You can wrap this in a small helper function:
function openFullscreen(element) {
if (element.requestFullscreen) {
element.requestFullscreen();
} else if (element.webkitRequestFullscreen) {
element.webkitRequestFullscreen();
} else if (element.mozRequestFullScreen) {
element.mozRequestFullScreen();
} else if (element.msRequestFullscreen) {
element.msRequestFullscreen();
}
}
// Usage:
const myDiv = document.getElementById("myElement");
openFullscreen(myDiv);? Exit Fullscreen Mode
You can exit fullscreen using document.exitFullscreen() :
document.exitFullscreen();
Or bind it to a button:
<button onclick="exitFullscreen()">Exit Fullscreen</button>
<script>
function exitFullscreen() {
if (document.exitFullscreen) {
document.exitFullscreen();
} else if (document.mozCancelFullScreen) {
document.mozCancelFullScreen();
} else if (document.webkitExitFullscreen) {
document.webkitExitFullscreen();
} else if (document.msExitFullscreen) {
document.msExitFullscreen();
}
}
</script>? Tips & Gotchas
- ? User gesture required : You can't enter fullscreen without a direct user action (click, tap, etc.).
- ? Fullscreen is per-document : Only one element can be fullscreen at a time.
- ? Styleing in fullscreen : You may want to style the element differently when fullscreen using CSS:
#myElement:fullscreen {
width: 100vw;
height: 100vh;
background: black;
} You can also use vendor-prefixed versions like :-webkit-full-screen if needed.
- ? Mobile support : Fullscreen API works on some mobile browsers, but behavior varies. Safari on iOS has limited support.
? Summary
To make an HTML element go fullscreen:
- Call
element.requestFullscreen()(with prefixes for compatibility). - Trigger it from a user action (eg, button click).
- Optionally style the element using
:fullscreenCSS pseudo-class. - Use
document.exitFullscreen()to leave fullscreen.
It's not complicated, but requires attention to browser support and user interaction rules. Most modern apps (like video players) use this API under the hood.
Basically, just use requestFullscreen() on a user-triggered event — and you're good to go.
The above is the detailed content of How to make an HTML element go fullscreen. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
What is the loading='lazy' one of the html attributes and how does it improve page performance?
Jul 01, 2025 am 01:33 AM
loading="lazy" is an HTML attribute for and which enables the browser's native lazy loading function to improve page performance. 1. It delays loading non-first-screen resources, reduces initial loading time, saves bandwidth and server requests; 2. It is suitable for large amounts of pictures or embedded content in long pages; 3. It is not suitable for first-screen images, small icons, or lazy loading using JavaScript; 4. It is necessary to cooperate with optimization measures such as setting sizes and compressing files to avoid layout offsets and ensure compatibility. When using it, you should test the scrolling experience and weigh the user experience.
Applying Semantic Structure with article, section, and aside in HTML
Jul 05, 2025 am 02:03 AM
The rational use of semantic tags in HTML can improve page structure clarity, accessibility and SEO effects. 1. Used for independent content blocks, such as blog posts or comments, it must be self-contained; 2. Used for classification related content, usually including titles, and is suitable for different modules of the page; 3. Used for auxiliary information related to the main content but not core, such as sidebar recommendations or author profiles. In actual development, labels should be combined and other, avoid excessive nesting, keep the structure simple, and verify the rationality of the structure through developer tools.
What are best practices for writing valid and well-formed HTML code?
Jul 01, 2025 am 01:32 AM
When writing legal and neat HTML, you need to pay attention to clear structure, correct semantics and standardized format. 1. Use the correct document type declaration to ensure that the browser parses according to the HTML5 standard; 2. Keep the tag closed and reasonably nested to avoid forgetting closed or wrong nesting elements; 3. Use semantic tags such as, etc. to improve accessibility and SEO; 4. The attribute value is always wrapped in quotes, and single or double quotes are used uniformly. Boolean attributes only need to exist, and the class name should be meaningful and avoid redundant attributes.
What are the essential HTML elements for structuring a webpage?
Jul 03, 2025 am 02:34 AM
The web page structure needs to be supported by core HTML elements. 1. The overall structure of the page is composed of , , which is the root element, which stores meta information and displays the content; 2. The content organization relies on title (-), paragraph () and block tags (such as ,) to improve organizational structure and SEO; 3. Navigation is implemented through and implemented, commonly used organizations are linked and supplemented with aria-current attribute to enhance accessibility; 4. Form interaction involves , , and , to ensure the complete user input and submission functions. Proper use of these elements can improve page clarity, maintenance and search engine optimization.
How to use the style html attributes for inline CSS?
Jul 01, 2025 am 01:42 AM
It is actually very simple to write inline styles using HTML's style attribute. Just add style="..." to the tag and then write CSS rules in it. 1. The basic writing method is CSS style with the attribute value in the form of a string. Each style is separated by a semicolon. The format is the attribute name: attribute value. For example: this paragraph of text is red. Note that the entire style string should be wrapped in double quotes. Each CSS attribute should be added with a semicolon after it. The attribute name is standard writing method of CSS; 2. Applicable scenarios for inline styles include dynamic style control, email template development and rapid debugging, such as allowing the picture to be displayed in the center to be written; 3. Several pitfalls that need to be avoided include high priority but difficult to maintain, many code repetitions, and special characters.
How can JavaScript be used to create and manipulate HTML tags?
Jul 01, 2025 am 01:42 AM
JavaScript dynamically creates, modifys, moves and deletes HTML elements through DOM operations. 1. Use document.createElement() to create a new element and add it to the page through appendChild() or insertBefore(); 2. Select existing elements through querySelector() or getElementById(), and modify them using textContent, innerHTML, setAttribute() and other methods; 3. When processing multiple elements through loops, you need to note that querySelectorAll() returns NodeList; 4. Move
Which html attributes are most important for SEO?
Jul 01, 2025 am 01:44 AM
ThefourmostimpactfulHTMLattributesforSEOarethetitletag,altattribute,hrefattribute,andmetadescription.1.Thetitletaginthesectioniscrucialasitinformsusersandsearchenginesaboutthepage’scontent,mustbeconcise,keyword-relevant,under60characters,anduniqueper
What are the integrity and crossorigin html attributes used for when loading scripts or styles from a CDN?
Jul 01, 2025 am 01:39 AM
Theintegrityattributeensuresaresourcehasn’tbeenmodifiedbyusingacryptographichash,whilecrossoriginhandlescross-originrequeststoenablepropervalidation.1.Integritychecksthefile’sauthenticityviaSHA-256,SHA-384,orSHA-512hashes,blockingmaliciousorcorrupted
