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    <h1>Capturing <kbd>Ctrl</kbd> keyboard events in Javascript</h1> <h3>Sample code:</h3> <pre><code>$(window).keydown(function(event) { if(event.ctrlKey &amp;&amp; event.keyCode == 84) { console.log("Hey! Ctrl+T event captured!"); event.preventDefault(); } if(event.ctrlKey &amp;&amp; event.keyCode == 83) { console.log("Hey! Ctrl+S event captured!"); event.preventDefault(); } }); </code></pre> <hr> <h2>Firefox</h2> <p><sub>(6.0.1 tested)</sub></p> <p>In Firefox both event listener works. If you press <kbd>Ctrl</kbd><kbd>T</kbd> or <kbd>Ctrl</kbd><kbd>S</kbd> keycombinations, you will get both message on the console, and the browser wont open a tab, nor ask for save.</p> <p><em>It is intresting that if you use <code>alert</code> instead of <code>console.log</code> the <code>event.preventDefault()</code> not works, and opens a new tab or asks for save. Maybe this bug needs to get fixed.</em></p> <hr> <h2>Chrome3</h2> <p>In Chrome 3 it works like in Firefox.</p> <hr> <h2>Chrome4</h2> <p><sub>(tested)</sub></p> <blockquote> <p>In Chrome4, certain control key combinations have been reserved for browser usage only and can no longer be intercepted by the client side JavaScript in the web page.<br> These restrictions did not exist in Chrome3 and are inconsistent with both Firefox3/3.5 and IE7/8 (on Windows).</p> </blockquote> <p>In Chrome 4 it works similary to Firefox, except some keyboard combination:</p> <ul> <li><p><kbd>Ctrl</kbd><kbd>N</kbd></p></li> <li><p><kbd>Ctrl</kbd><kbd>Shift</kbd><kbd>N</kbd></p></li> <li><p><kbd>Ctrl</kbd><kbd>T</kbd></p></li> <li><p><kbd>Ctrl</kbd><kbd>Shift</kbd><kbd>T</kbd></p></li> <li><p><kbd>Ctrl</kbd><kbd>W</kbd></p></li> <li><p><kbd>Ctrl</kbd><kbd>Shift</kbd><kbd>W</kbd></p></li> </ul> <p>These combinations cannot get captured by Javascript, <strong>but</strong> embed plugins can capture these. For example if you focus in a Youtube video and press <kbd>Ctrl</kbd><kbd>T</kbd>, the browser won't open a new tab.</p> <hr> <h2>IE7/8</h2> <p>It works like in Firefox or Chrome3.</p> <hr> <h2>IE9</h2> <p><sub>(tested)</sub></p> <p>IE9 is a black sheep again, because it dosen't allow javascript to capture any <kbd>Ctrl</kbd><kbd>?</kbd> keyboard event. I tested with many keyboard combination (R,T,P,S,N,T) and neither worked. Also embed applications can't capture the event. Tested with Youtube videos.</p> <hr> <p><strong>Thanks to <a href="https://stackoverflow.com/questions/7295508/#comment-8789103">@Lime</a> for the great <a href="http://code.google.com/p/chromium/issues/detail?id=33056" rel="noreferrer">link</a>.</strong></p>
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    1. USGergely Fehérvári
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    1. COI have IE 9.0.6 and I can catch and cancel `Ctrl+[R,T,S,N]` (**Not P**) on `keydown` and `up`, and on both `document` and `window`.
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      1. USYousef Salimpour
    2. CO@Yousef, could you block `Ctrl+O`? It seems that this other key cannot be trapped in IE9.
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      1. USAlexis Wilke
 

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