1791759 - Implement CSS Containment content-visibility: auto

Status: RESOLVED FIXED

(Core :: Layout, enhancement)

Description

[Martin Robinson (email:[e-mail])]

This bug tracks implementing the auto value of the content-visibility property.

Comment 1

[Martin Robinson (email:[e-mail])]

Attachment: Bug 1791759 - Add support for `content-visibility: auto` r=emilio

This change adds support for content-visibilty: auto as well as
showing and hiding content based on the relevancy of the content as
defined in the specification. Changes to relevancy are handled by
triggering updates in a set of content-visibility: auto frames stored
in PresShell at the appropriate time in the document lifecycle.

Some tests are updated. In the case of content-visibility-068.html a new
node is added in order to properly test focus() and blur() without only
having a single focusable element on the page.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c428c3ad7725
Add support for `content-visibility: auto` r=emilio

Comment 3

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/37183 for changes under testing/web-platform/tests

Comment 4

[Marian-Vasile Laza]

Backed out changeset c428c3ad7725 (Bug 1791759) for causing wpt failures on auto-012.html.
Backout link
Push with failures <--> wpt29
Failure Log

Comment 5

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Upstream PR was closed without merging

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c1e64e8e4665
Add support for `content-visibility: auto` r=emilio

Comment 7

[Martin Robinson (email:[e-mail])]

I uploaded a new version of this change which fixed the failing test and landed it after confirming with emilio that it looked okay.

Comment 8

[Norisz Fay [:noriszfay]]

https://hg.mozilla.org/mozilla-central/rev/c1e64e8e4665

Comment 9

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Upstream PR merged by moz-wptsync-bot

Comment 10

[Ruth John]

Docs worked can be tracked here https://github.com/mdn/content/issues/22736

Comment 11

[Dave Letorey]

Associated Pull Requests

mdn/browser-compat-data:

• CSS content-visibility: auto; - https://github.com/mdn/browser-compat-data/pull/18627

mdn/content:

• CSS content-visibility: auto; - https://github.com/mdn/content/pull/23555

releases

• CSS content-visibility: auto; - https://github.com/mdn/content/pull/23556

Comment 12

[alexander :surkov (:asurkov)]

Attachment: Bug 1791759 - remove unused ContentRelevancyReason::DescendantOfTopLayerElement

Comment 13

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/62c1b893b282
remove unused ContentRelevancyReason::DescendantOfTopLayerElement r=emilio

Comment 14

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

A patch has been attached on this bug, which was already closed. Filing a separate bug will ensure better tracking. If this was not by mistake and further action is needed, please alert the appropriate party. (Or: if the patch doesn't change behavior -- e.g. landing a test case, or fixing a typo -- then feel free to disregard this message)

Comment 15

[Cristina Horotan [:chorotan]]

https://hg.mozilla.org/mozilla-central/rev/62c1b893b282