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October 2020 - Code Health, Scroll Timelines, Synthetic User Activation, Scroll Unification and more!

October 2020 Chrome Interactions Highlights Archives: go/interactions-team-highlights
<td><td>We made steady progress on bug fixes.</td></td>

<td><td>We held steady on P0s and P1s.</td></td>

<td><td>Nearly held steady on P2s, which is awesome!</td></td>
<td><td>Landed 13 patches.</td></td>

<td><td>Discovered two bugs.</td></td>

    error thrown</a>.</td></td>

    missing in spec</a>.</td></td>

<td><td>215 new passing tests out of 354 total tests. The above graph shows
the number of passing tests when each patch landed.</td></td>
<td><td>Seeing expected results for non-extensions, but not expected for
<td><td>Ran finch experiment at 25% on Canary and Dev channels.</td></td>

<td><td>Expanded finch experiment to 50% Canary and Dev

<td><td>Currently in progress of moving to 50% on Canary, Dev and Beta
<td><td>This makes ~10% of transform animations potentially less
Code health image The graph shows our latest bug fixing efforts in this sprint: Scroll timeline image flackr@ made tremendous progress on scroll timeline polyfill:
Synthetic user activation image TriggerForConsuming image TriggerForTrasient image TriggerForSticky mustaq@ has done with UMA for synthetic triggers. Scroll unification liviutinta@ organized the remaining work on scroll unification, and splits the work between Q4 2020 and Q1 2021. This doc captures the work nicely. Click/Auxclick as pointer event mustaq@ is working on a finch experiment on this feature..
Composite transform animations containing percents image gtsteel@ has landed a complete implementation for animations targeting CSS boxes. The above demo shows the difference of running the animation on the main vs the compositor thread (with artificial jank). Devtool input protocol lanwei@ has merged the spec change of adding pointerevent’s additional properties to Webdriver Action API and added these properties to Devtool Input Protocol. imageimage
Chrome Interactions Highlights | October 2020 go/interactions-team