How to capture browser close button or exit page events in javascript

Many times, we have certain requirements to do something, such as invalid sessions. Every time a user clicks the close button in the browser, the close event is called in the browser. Let's take a look at how to use JavaScript. In JavaScript, We have onbeforeunload and onunload events, such .... SyntaxHighlight

Many times, we have certain requirements to do something, such as invalid sessions. Every time a user clicks the close button in the browser, the close event is called in the browser.
 
Let's take a look at how to use JavaScript. In JavaScript, We have onbeforeunload and onunload events, such. Because their name implies that the page is uninstalled when these events are triggered. This happens if the user closes the browser or moves to a different page.
 
We can use these events to call any JavaScript processing function. Register an event from the body tag.