I am learning javascript and I was thinking about how can I add an alert or confirm box with javascript when a user wants to close the tab? it would be very good If you guys help me to do the job. Thank you in advance.
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4Welcome to Stack Overflow! Visit the [help], take the [tour] to see what and [ask]. Please first ***>>>[Search for related topics on SO](https://www.google.com/search?q=javascript+alert+tab+close+site%3Astackoverflow.com)<<<*** and if you get stuck, post a [mcve] of your attempt, noting input and expected output using the [`[<>]`](https://meta.stackoverflow.com/questions/358992/ive-been-told-to-create-a-runnable-example-with-stack-snippets-how-do-i-do) snippet editor. – mplungjan Jan 10 '22 at 09:19
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window.onbeforeunload = function(e) {
return 'Are you sure want to close the tab';
};
Aman Sharma
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alert("Hello! I am an alert box!!");
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where is other code, this is just an alert, you need to read the whole question first – Aman Sharma Jan 10 '22 at 09:23