1086948 - Remove 'instant' option for the 'scroll-behavior' CSS property

Status: RESOLVED FIXED

(Core :: DOM: CSS Object Model, defect)

Description

[:kip (Kearwood Gilbert)]

The 'scroll-behavior' CSS property should only accept 'auto' and 'smooth'

The CSSOM-View specification has been updated to reflect conversations on www-style and W3.org bugs regarding the "scroll-behavior: instant" CSS value.  As there are not strong use cases for disabling smooth scrolling effects that are enabled by default in the browser, the 'instant' option will be dropped.

The decision for now has been to eliminate the "scroll-behavior: instant" CSS value and retain the "smooth" and "auto" values as implemented in Bug 1010538.

Comment 1

[:kip (Kearwood Gilbert)]

Attachment: Bug 1086948 - Remove scroll-behavior: instant CSS value option,r=bz

- Removed "instant" CSS keyword and references used by scroll-behavior.
- Updated tests, removing scroll-behavior: instant test cases.

Comment 2

[:kip (Kearwood Gilbert)]

This has been pushed to try, and came back green:

https://treeherder.mozilla.org/ui/#/jobs?repo=try&revision=0170375f37a3

Comment 3

[Boris Zbarsky [:bzbarsky]]

Comment on attachment 8509703 [details] [diff] [review]
Bug 1086948 - Remove scroll-behavior: instant CSS value option,r=bz

r=me

Comment 4

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/b2ba88cd08c0

Comment 5

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/b2ba88cd08c0