How Can I Detect Browser or Tab Visibility Using JavaScript?

Determining Browser/Tab Visibility

To ascertain if the browser or a specific tab is active, JavaScript provides several methods:

1. Page Visibility API

Modern browsers support the Page Visibility API, which enables you to check the visibility state of the page using the document.hidden property:

if (!document.hidden) {
    // Do your desired actions
}

2. jQuery Event Listener

jQuery offers a simpler approach using event listeners:

$(window).on("focus", function() {
    // Browser/tab is now active
}).on("blur", function() {
    // Browser/tab is now inactive
});

3. Page Visibility Events

Alternatively, you can listen for specific page visibility events:

document.addEventListener("visibilitychange", function() {
    if (document.visibilityState === "visible") {
        // Browser/tab is visible
    } else {
        // Browser/tab is hidden
    }
});

4. Browser-Specific Methods

Different browsers may provide their own methods:

• Chrome: document.webkitHidden
• Firefox: document.mozHidden
• Internet Explorer: document.msHidden

Additional Resources

For further exploration:

• [Page Visibility API documentation](https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API)
• [jQuery event documentation](https://api.jquery.com/focus/)
• [Browser visibility events](https://caniuse.com/mdn-api_document_visiblestate)
• [Power-efficient web applications using the Page Visibility API](https://developers.google.com/chrome/whitepapers/pagevisibility)

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