1875546 - [css-properties-values-api] Support interpolating registered custom properties in transitions

Status: RESOLVED FIXED

(Core :: CSS Transitions and Animations, enhancement)

Description

[Zach Hoffman [:zrhoffman]]

Attachment: Testcase for a transition interpolating a custom property

Once the patch in bug 1869185 has landed custom properties can be interpolated using keyframes, but not using transitions. Transitions should support interpolation, as well.

Comment 1

[Zach Hoffman [:zrhoffman]]

Attachment: Bug 1875546 - [css-properties-values-api] Support interpolating custom properties in transitions r=#animation,#style

There are still some unhandled edge cases, like making the removal of an
@property rule not interpolate (bug 1885798).

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/ca2507391266
[css-properties-values-api] Support interpolating custom properties in transitions r=firefox-style-system-reviewers,emilio

Comment 3

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/ca2507391266

Comment 4

[Donal Meehan [:dmeehan]]

:zrhoffman anything you want to consider nominating for a release note? (Process info)
We could include it in the nightly release notes.

Comment 5

[Daniel Holbert [:dholbert]]

(In reply to Donal Meehan [:dmeehan] from comment #4)

:zrhoffman anything you want to consider nominating for a release note? (Process info)
We could include it in the nightly release notes.

Clearing this needinfo, given that this has now been in Nightly for a month (so probably too late for a Nightly release note), and the feature in question is preffed off beyond Nightly right now:
https://searchfox.org/mozilla-central/rev/c7df16ffad1f12a19c81c16bce0b65e4a15304d0/modules/libpref/init/StaticPrefList.yaml#8781-8783

# Whether Properties and Values is enabled
- name: layout.css.properties-and-values.enabled
  type: RelaxedAtomicBool