Why trigger F11 press event doesn't work?

Question

I just read this question: Full Screen Page by pressing button instead of F11
The op asked to replace F11 with other hot keys, so I'm wondering that maybe I can simulate press F11 to get things work.
I learned that I can use trigger in JQuery to simulate key press event, so I do something like this:

$("body").keyup(function (e) {
    alert(e.which);
});
var e = $.Event("keyup");
e.which = 122; // # Key code of F11
$("body").trigger(e);  

When I run this, I got the alert says 122, but it seems that it doesn't give the hoped result. Is there a restriction there?

I made a fiddle here: http://jsfiddle.net/ap295/5/

Massimo

I don't think that it's possible to execute key commands by just triggering events programmatically. That would be insane. – Abana

let's trigger CMD + Q or ALT + F4 ? All serious browsers will not execute that due to Javascript. – Caespitose

Answer 1

I think this is the one :) to detect it ...

$(document).keyup(function(e){
   if(e.which==122){
       e.preventDefault();//kill anything that browser may have assigned to it by default
       //do what ever you wish here :) 
       alert('F11 pressed');
       return false;
   }
});

but triggering it (NOT POSSIBLE)

But you will not prevent the browser from full screen :) ... Reson given is that , lets say I have full screened it somehow, and wish to toggle out of it using F11 but u are preventing me, I would have to restart PC, [computer illiterates] which poses security risk as you are preventing a user from doing something he is expecting to do, and they may think PC is broken or something :) so ...there you are.

Teller

I do want to let the browser do what they assigned to it by default..that is turn to fullscreen mode – Massimo

Like I said you are asking to take control of some persons keyboard which is stupid, lets say i visit FB, fb then triggers, f11,and then f, and then u, n then triggers the comment button, basically all I had to do is login on fb, then fb would type in what ever they wanted on my profile ... do you understand ? – Teller

Answer 2

You can not do this. The linked answer in that question provides a way with jQuery to simulate key-presses, within the jQuery event framework.

You simply can not trigger or fake keypresses. So the answer of this question is:

No, this is impossible

Mali

Answer 3

You won't be able to override the browser's built-in hotkeys from within a web page.

You might be able to do it in a browser extension, but that's would surely be serious overkill just to change the application's hotkeys.

In any case, why would you even want to override the standard keyboard shortcuts? I don't get that. They've been standard for a long time; most users will be familiar with them, and will find it very odd if they've been changed to something else.

Shatterproof

why would you even want to override the standard keyboard shortcuts: I think it's nicer to let the user click a button wrote "fullscreen" than alert to tell them: "Please press F11 key now" – Massimo

Answer 4

Don't look at is as a question of "How do I trigger F11?" - look at is as "How do I trigger or simulate full-screen?"

With older versions of IE you can open a new window straight into full-screen:

window.open(someURLorOther, '', 'fullscreen=yes, scrollbars=auto');

Or you can use window.open to open a new window of a specific size.

Or you can try to resize the current window to fill the screen:

moveTo(0,0);
resizeTo(screen.availWidth,screen.availHeight);

However just because you can doesn't mean you should. You should never resize the current window - this annoys practically everyone. Opening a new window to a size you choose is more reasonable, though if it's too big it can be annoying, and on a normal web page (where by "normal" I probably mean not some kind of browser-based data-entry app) it is nicer not to open new windows.

Goodnatured