Can JavaScript Reliably Detect Browser or Tab Closure Without False Positives from Link Clicks?

Detecting Browser Closures with JavaScript

Detecting browser or tab closures is a common requirement in web development. However, it requires careful consideration of cross-browser compatibility.

The Problem:

Is there a reliable JavaScript/jQuery function that can detect if a browser or browser tab is being closed without triggering when a link is clicked?

The Answer:

Unfortunately, there is no universally accepted solution for detecting browser closures. However, the most widely used events for this purpose are onunload and onbeforeunload.

Explanation:

• onunload is fired when a user closes a window or tab, but it also triggers when a user navigates away from a page using a link.
• onbeforeunload is similar to onunload, but it provides a callback function that can be used to display a confirmation window or perform other actions before the page unloads.

However, it's important to note that both of these events can be overridden or prevented by the user, and certain browser extensions or anti-tracking measures may block them entirely.

Therefore, while onunload and onbeforeunload are the best available options for detecting browser closures, they should be used with caution and may not be suitable for all use cases.

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