如何实现PSVita浏览器全屏？自研HTML页面调用全屏API失效求助

Hey there, let's figure out why your fullscreen API calls aren't working on the PS Vita browser!

First, it's important to remember that the PS Vita's browser runs on an older WebKit-based engine, and Sony has some unique restrictions around fullscreen functionality that don't apply to modern desktop/mobile browsers. Let's walk through the fixes step by step:

1. Add a Proper Viewport Meta Tag #

The PS Vita's browser relies heavily on viewport settings to render pages correctly. Without this, fullscreen might not trigger at all. Add this to your HTML <head>:

<head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
</head>

2. Adjust Your CSS to Fill the Viewport #

Make sure your page doesn't have scrollbars or extra margins that could block fullscreen activation. Add this CSS:

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

3. Update Your Fullscreen Function for PS Vita's WebKit #

The PS Vita's old WebKit implementation has two key quirks:

• It uses a case-sensitive version of the API (webkitRequestFullScreen with a capital 'S' instead of lowercase)
• It may require a ALLOW_KEYBOARD_INPUT parameter to enable fullscreen

Here's the updated JavaScript function:

function launchFullscreen(element) {
    // Standard fullscreen API
    if (element.requestFullscreen) {
        element.requestFullscreen();
    } 
    // Firefox compatibility
    else if (element.mozRequestFullScreen) {
        element.mozRequestFullScreen();
    } 
    // IE/Edge compatibility
    else if (element.msRequestFullscreen) {
        element.msRequestFullscreen();
    } 
    // Modern WebKit fallback
    else if (element.webkitRequestFullscreen) {
        element.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
    } 
    // PS Vita's older WebKit (critical for this device)
    else if (element.webkitRequestFullScreen) {
        element.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
    }
}

4. Target document.body Instead of document.documentElement #

Some older browsers (including the PS Vita's) handle fullscreen better when targeting the <body> element rather than the root document element. Update your button to:

<button onclick="launchFullscreen(document.body)">FullScreen</button>

A Quick Note on PS Vita Limitations #

Even with these fixes, keep in mind that Sony might restrict fullscreen for certain types of content. If this still doesn't work, try testing with a minimal page (no extra scripts/styles) to rule out conflicts. Some users have also reported that manually triggering fullscreen via the PS Vita's browser menu (if available) might be more reliable than JS, but the above steps should cover most cases where JS-triggered fullscreen is allowed.

内容的提问来源于stack exchange，提问作者YeJun