Re: [csswg-drafts] [css-view-transitions-1] Animate backdrop-filter for named elements (#9358)

The CSS Working Group just discussed `[css-view-transitions-1] Animate backdrop-filter for named elements`, and agreed to the following:

* `RESOLVED: animate backdrop-filter for view transitions similar to transform/size`

<details><summary>The full IRC log of that discussion</summary>
&lt;jensimmons> I just wrote a Mastodon question to get a bit feedback:https://front-end.social/@jensimmons/111138016628140950<br>
&lt;emeyer> khush: There was a case where the author has put a backdrop filter on a transition with a name<br>
&lt;emeyer> …This ran into the mix blend problem<br>
&lt;emeyer> …During view transitions, the property gets dropped on the floor<br>
&lt;emeyer> …It doesn’t get applied<br>
&lt;emeyer> …The proposal is to treat it similar to mix-blend-mode, where the computed value of the backdrop filter gets copied to its group pseudo<br>
&lt;emeyer> …Just like anything else, authors can override it<br>
&lt;emeyer> …See the issue for visual examples of what this looks like<br>
&lt;emeyer> …A complicated problem is in the context of cross-document navigation<br>
&lt;emeyer> …Cross-origin restrictions can create problems<br>
&lt;emeyer> …If we serialize the state and transition to another document, if they have different policies, it gets blocked, which is fine from a security perspective<br>
&lt;emeyer> …The alternative is to transfer resources across, which could leak information<br>
&lt;emeyer> …Proposed resolution: animate backdrop-filter for view transition similar to transform/size<br>
&lt;emeyer> emilio: Why is this not a problem with mix-blend-mode?<br>
&lt;emeyer> khush: We came up with a similar solution there, but it’s not interpolatable so it just switches over<br>
&lt;emeyer> …In this case, I’m proposing we set up an animation<br>
&lt;emeyer> astearns: Any concerns with adding backdrop-filter to the list of things that get copied over?  Any objections?<br>
&lt;emeyer> (silence)<br>
&lt;emeyer> RESOLVED: animate backdrop-filter for view transitions similar to transform/size<br>
</details>


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Received on Wednesday, 27 September 2023 16:25:27 UTC