1752687 - Firefox browser won't focus on web component, while all other browsers do.

Status: RESOLVED INVALID

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[istvan.tutto]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Steps to reproduce:

Created a Web component and tried calling the webcomponent.focus() to focus the element:

https://codepen.io/istutto/pen/XWzmdoW

FF: 91.5.1esr (64-bit)
On Mac (Catalina, 10.15.7)

Actual results:

The javascript focus() method called on a web component will not focus the element nor the the element inside.

Expected results:

All other major browsers behave as expected:
The web component gets focused the same as any other element.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::DOM: UI Events & Focus Handling' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Hsin-Yi Tsai (she/her) [:hsinyi]]

I confirmed this issue on Fx 98 nightly, too.
Sean, this issue sounds quite fundamental. Do you have ideas what's up here?

Comment 3

[Emilio Cobos Álvarez (:emilio)]

On Firefox 91 we didn't support delegatesFocus so it's expected it doesn't work. On Nightly the button is focused (you can see it with :focus { outline: 2px red } or so), but since it was focused via mouse it doesn't show focus rings.

Comment 4

[Hsin-Yi Tsai (she/her) [:hsinyi]]

(In reply to Emilio Cobos Álvarez (:emilio) from comment #3)

On Firefox 91 we didn't support delegatesFocus so it's expected it doesn't work. On Nightly the button is focused (you can see it with :focus { outline: 2px red } or so), but since it was focused via mouse it doesn't show focus rings.

A-ha, okay, now I see it. Thanks :)

Comment 5

[istvan.tutto]

Thank you for looking into this. I thought I was on the latest FF version as it showed that it was up to date.
After the manually downloading a new version, everything works as expected.