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From: "Christoph M. Becker" <cmbecker69@arcor.de>
Newsgroups: comp.lang.javascript
Subject: Re: Interrogation of Shift-Key state - workaround
Date: Sun, 26 Jun 2016 00:53:54 +0200
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On 26.06.2016 at 00:33, Janis Papanagnou wrote:

> On 25.06.2016 14:59, Janis Papanagnou wrote:

>> I want to interrogate the boolean state of the Shift-Key (pressed or not).
> 
> In my system context (Linux) the workaround that I wanted to avoid works as
> expected at least. So for folks who want to implement such functionality
> and are interested in my workaround I post the code skeleton for reference.
>
> […]

In another reply you've mentioned that you're actually being interested
in interogating whether a shift key is pressed while a mouse button is
clicked.  For that purpose you don't need that workaround, but rather
can ask for whether a shift key is pressed in the click event handler
(as has been pointed out by others already[1]):

  someElement.addEventListener("click", function (event) {
    if (event.shiftKey) {
      alert("shift key pressed while mouse button clicked");
    }
  }

[1] Which have been actually more useful replies than this one, even
though that might not appear so to you. :)

-- 
Christoph M. Becker