Jquery Onbeforeonload

Question

This simple code from jquery is not picking up the unload event. The console says caching is being disabled.

I want users prompted on clicking on each link on my page that leave page, but does not prompt when they close page. Any suggestions.

<html> <script src="jquery-3.1.1.min.js"></script> <body> <a href="https://www.science.gov" id="navigate">science</a> </body> <script> $(window).on('beforeunload', function(){ return('Are you sure you want to leave?')}; </script> </html>

Please note that almost all html tags will not shown untill you put it in a code block. So, people will not be able to read the code. Try using the buttons in the question form wisely. — Sagar V
– Sagar V, Commented Mar 16, 2017 at 13:50

Ricardo van Laarhoven · Accepted Answer · 2017-03-16 13:50:19Z

there is an error in your code, you mis a ) at the end

Uncaught SyntaxError: missing ) after argument list

change your code to: $(window).on('beforeunload', function(){ return('Are you sure you want to leave?')});

Sagar V · Accepted Answer · 2017-03-16 13:54:54Z

0

return is not a function and it will not prompt. Try return prompt();

<html> <script src="jquery-3.1.1.min.js"></script> <body> <a href="https://www.science.gov" id="navigate">science</a> </body> <script> $(window).on('beforeunload', function(){ return prompt('Are you sure you want to leave?');}); </script> </html>

answered Mar 16, 2017 at 13:54

Sagar V

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3 Comments

MEV Over a year ago

my include of jquery source code is not showing up on code view in html browser. Should that have 'https://' added to the src statement?

Sagar V Over a year ago

If it is from same origin(your own server, no need). Otherwise add the full url

MEV Over a year ago

<!DOCTYPE html> <html> <script src="code.jquery.com/ui/1.11.2/jquery-ui.js"></script> <body> <a href="science.gov" id="navigate">science</a> </body> <script> $(window).on('beforeunload', function(){ return prompt('Are you sure you want to leave?')}); </script> </html> This is not producing a prompt.

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