How to disable ALT + F4 using JavaScript or jQuery

Question

I want to disable ALTF4 from working closing the page in aspnethow can i do this in javascript or code behinde C Thanks

Shashikant · Accepted Answer

HiIt is not possible to disable AltF4 using javascript instead of that you can use onbeforeunloadPlease refer below codelthtml xmlns34httpwwww3org1999xhtml34gtltheadgt    lttitlegtlttitlegt    ltscript type34textjavascript34 src34httpajaxgoogleapiscomajaxlibsjquery172jqueryminjs34gtltscriptgt    ltscript type34textjavascript34gt        windowonbeforeunload  function              return 34your message34            ltscriptgtltheadgtltbodygtltbodygtlthtmlgtDemo

Shashikant · Answer

HiAltF4 key event is on most OSs I guess processed by the OS before itS even sent to the browser so cancelling the event inside the browser wont help a thing  even if it was Javascript that is executed inside the browsers UI not only the current documentTherefore  what youre trying to do cannot be doneso please refer my previous reply if you dont want to show message write return false instead of return your message iehttpwwwaspforumsnetThreads970279HowtodisableALTF4Replies1Replies

How to disable ALT + F4 using JavaScript or jQuery

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