Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 14:20

If you right-click the result area on this JSFiddle, when you release right-click "a" is displayed. This is not the case on other browsers, where only a left click triggers the click event. https://w3c.github.io/uievents/#event-type-click specifies that the click event is only meant to be fired by clicking the primary pointer button or simulating such an action.

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 14:56

Also occurs with the middle mouse button

Kris_88 · Unread post by **Kris_88** » 2023-10-26, 15:15

Can't confirm.
https://www.w3schools.com/jsref/tryit.a ... ef_onclick
https://www.w3schools.com/jsref/tryit.a ... tlistener2

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 15:48

It applies for window, not a button element. Did you try https://jsfiddle.net/wkcr5p4e/?

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 15:49

If you switch the code in the second link you sent to document.addEventListener("click", myFunction); or window.addEventListener("click", myFunction); instead of element.addEventListener("click", myFunction); it occurs.

Kris_88 · Unread post by **Kris_88** » 2023-10-26, 16:01

Good!

viewtopic.php?f=73&t=30125&start=20

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 17:57

That link is slightly different. The latest Firefox version clicks the hovered over option when releasing right-click on the browser's context menu, yes. However, that Firefox version does not actually fire a click event to the document or window at that time. Only Pale Moon does that. And firing the click event when using the middle or right mouse button definitely contradicts the part of the w3c spec that says "The click event should only be fired for the primary pointer button (i.e., when button value is 0, buttons value is 1). Secondary buttons (like the middle or right button on a standard mouse) MUST NOT fire click events."

Unread post by **Moonchild** » 2023-10-26, 18:34

I confirm that we're doing this differently than Google Chrome or the latest Firefox. That said this is not a regression as far as I can tell.
The issue is that you're attaching the click event to the window, way up the hierarchy and not on a trusted target for receiving these events (which are meant to be Elements, not the document or window, see also the table in the W3C spec you're referring to). You should never do that.

It doesn't seem like even Mozilla themselves have a clear record of when this changed, it may need a mozregression to find out.

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 18:48

Hmm, interesting, you're right that those are not Trusted Targets, but I've seen so many people all over the web do document.addEventListener("click") or window.addEventListener("click") that I never would have thought as much.

I suppose the simplest workaround, which would also match the spec, would be to use document.documentElement.

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 19:07

It's so prevalent it even appears on https://www.w3schools.com/jsref/met_doc ... stener.asp

craniumcadoo · Unread post by **craniumcadoo** » 2023-10-26, 19:14

According to https://developer.mozilla.org/en-US/doc ... patibility, Firefox 68 was when this behavior changed.

See https://developer.mozilla.org/en-US/doc ... dom_events

Bugzilla ticket https://bugzilla.mozilla.org/show_bug.cgi?id=1379466

Unread post by **Moonchild** » 2023-10-26, 19:22

Thank you for finding the BZ bug! We can work with that.

Filed Issue #2362 (UXP)

Pale Moon forum

Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

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Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/

Re: Only on Pale Moon, releasing right-click fires click event on https://jsfiddle.net/wkcr5p4e/