E which keycode

Crowder k gold badges silver badges bronze badges. Thanks T. Where would I find a reference for this? Not that I don't believe you, I'm just curious! I see you just added that, thanks. So, even for those not using jquery,. ScottE: If not using jQuery, you have to handle this explicitly yourself. ScottE, here is a basic reference: quirksmode. And quirksmode is not authoritative here. As a reference, the link that T.

Crowder posted is much better: unixpapa. Crowder: Yes, the event's which property can be zero, and this can make a big difference to most applications.

For example, non-printable keys in Firefox have a which property of zero and the same keyCode property as keydown. Show 7 more comments. David Tang David Tang And I don't think checking for "" or [] hurts. If you are staying in vanilla Javascript, please note keyCode is now deprecated and will be dropped: This feature has been removed from the Web standards.

Both 'code' and 'key' have quirks in modern browsers. Using the "Try it out" example on MDN developer. I think using a library might be easiest unless you're willing to account for these vagaries yourself. I really want this to be the answer, but IE screws this one up :- — Akrikos. I would advise using key instead of code. You should avoid using this if possible; it's been deprecated for some time. Instead, you should use KeyboardEvent. Unfortunately, some browsers still don't have it, so you'll have to be careful to make sure you use one which is supported on all target browsers.

Note: Web developers shouldn't use the keyCode attribute for printable characters when handling keydown and keyup events. As described above, the keyCode attribute is not useful for printable characters, especially those input with the Shift or Alt key pressed.

When implementing a shortcut key handler, the keypress event is usually better at least when Gecko is the runtime in use. See Gecko Keypress Event for details. The value of key events which are caused by pressing or releasing printable keys in standard position is not compatible between browsers.

Google Chrome, Chromium and Safari must decide the value from the input character. If the inputting character can be inputted with the US keyboard layout, they use the keyCode value on the US keyboard layout. Starting in Firefox 15 Firefox See the following rules for details:. Starting in Firefox 60 Firefox Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.

While using W3Schools, you agree to have read and accepted our terms of use , cookie and privacy policy. Copyright by Refsnes Data. All Rights Reserved. The keypress event works only for a subset of the keys. You can't capture the Alt, Ctrl, Shift, Meta, and other similar key events with a keypress. This also means that we can not fire the keypress event with key combinations like Ctrl Z , Shift Tab , and so on. Moreover, the keypress event has been deprecated.

This is a big enough reason to avoid it. While both keydown and keyup events cover all the keys and are well supported by most browsers, there are a few differences that push keydown ahead of keyup. The keydown event fires before the browser processes the key, whereas the keyup event fires after the browser processes the key.

If you cancel a keydown event say, using event. In case of the keyup event, the browser's action will not be canceled even when you have canceled the event. How to use the KeyboardEvent properties in practice This is the billion dollar question!

It depends on: The browser support for your application How legacy is your application code is and how much are you willing to refactor? The value is true when Alt key is pressed. The value is true when Control key is pressed. The value is true when Shift key is pressed. The value is true when any of the Meta keys are pressed. No code Code value of the Physical Key. No key The actual value of the key pressed. No charCode Returns the Unicode value. This has been deprecated and we should use the key property instead.

Yes keyCode Returns the neumeric code of the pressed value. Yes which Returns the neumeric code of the pressed value. Yes The last three properties are deprecated and you should use the key property instead.

Modifier Keys The modifier keys are the special keys on your keyboard that modify the default behavior of the other keys. Key Combinations We can combine multiple keys and perform actions based on the key combinations. The code snippet below shows how to combine the Control and z key to define an action: document. Key Name event. Hoever the event. The event.