2038877 - Let ::-webkit-scrollbar ride on trains

Status: RESOLVED FIXED

(Core :: Layout: Scrolling and Overflow, task)

Comment 1

[Hiroyuki Ikezoe (:hiro)]

Attachment: Bug 2038877 - Let ::webkit-scrollbar ride on trains. r?#layout-reviewers

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/6cb4a574ea42
https://hg.mozilla.org/integration/autoland/rev/26632f37407a
Let ::webkit-scrollbar ride on trains. r=layout-reviewers,dholbert

Comment 3

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/26632f37407a

Comment 4

[Ryan VanderMeulen [:RyanVM]]

Please add a relnote-firefox? nomination to this bug when you have a chance.

Comment 5

[Hiroyuki Ikezoe (:hiro)]

Release Note Request (optional, but appreciated)
[Why is this notable]:
Firefox now supports a limited, targeted subset of the non-standard ::-webkit-scrollbar pseudo-element, which is widely used on the web (Chrome and Safari implement it broadly). This fixes long-standing web compatibility issues on popular sites such as Google, Gmail, and Slack, where scrollbars were rendered incorrectly, double-stacked, or in some cases made nested scroll containers unreachable. The CSS Scrollbars specification acknowledges ::-webkit-scrollbar and defers to the standard scrollbar-width property when both are used.

[Suggested wording]:
Firefox now supports a limited subset of the non-standard ::-webkit-scrollbar pseudo-element to improve web compatibility:

• Rules with non-zero width/height disable overlay scrollbars for the affected container.
• display: none on ::-webkit-scrollbar behaves like scrollbar-width: none, hiding the scrollbar.
• @supports selector(::-webkit-scrollbar) now evaluates to true.
  Full styling capabilities (colors, border-radius, etc.) are intentionally not supported

[Links (documentation, blog post, etc)]:

(Note that if "None" is in the Links section, in the preview the Links section never appears, so I am going to leave it as blank)

Comment 6

[Ryan VanderMeulen [:RyanVM]]

Added to the Fx152 relnotes, thanks.