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Re: event.key and event.char for combined key presses (ctrl+b etc)

From: Michael A. Puls II <shadow2531@gmail.com>
Date: Sat, 14 Jan 2012 04:29:55 -0500
To: www-dom@w3.org, "Hallvord R. M. Steen" <hallvord@opera.com>
Message-ID: <op.v72hz5f01ejg13@vertiform346>
On Tue, 03 Jan 2012 13:42:23 -0500, Hallvord R. M. Steen  
<hallvord@opera.com> wrote:

> Hi,
> quick question: if one presses ctrl+b, what should event.key and  
> event.char be set to for the B key's keydown and keyup events?
>
> I'm not off the top of my head certain whether the B key should cause a  
> keypress event here either. Spec text doesn't really say whether you  
> should take the state of other keys into account when determining  
> whether the key "normally" outputs a character:
>
> "A user agent must dispatch this event when a key is pressed down, if  
> and only if that key normally produces a character value"

Not sure if it helps, but I tested with Firefox, Opera and Chrome with  
keyCode and charCode while pressing ctrl and b simultaneously:

For 'keypress' and ctrl + b in a textarea:

         keyCode charCode
Firefox 0       98
Opera   98      undefined
Chrome  2       2

For 'keyup':

Chrome: Two events: 66 0 and then 17 0 (in that order, no matter if b is  
held down first or not)

Firefox: Sometimes one event of 66 0 and sometimes two events 66 0 and 17  
0 (in that order, no matter if b is held down first or not)

Opera: 66 undefined 17 undefined or 17 undefined 16 undefined depending on  
whether b was held down first first.

For 'keydown':

Firefox and Chrome: 17 0 66 0 or 66 0 17 0 depending on which key was  
pressed down first. Opera the same except undefined instead of 0.

(IE doesn't fire events for ctrl + b in this case)

-- 
Michael
Received on Saturday, 14 January 2012 09:30:43 GMT

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