[Webkit-unassigned] [Bug 283894] New: Web Inspector: Reduce motion pref is not working on SVG image loaded through background images

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=283894

            Bug ID: 283894
           Summary: Web Inspector: Reduce motion pref is not working on
                    SVG image loaded through background images
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
               URL: https://www.24joursdeweb.fr
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: karlcow at apple.com
                CC: inspector-bugzilla-changes at group.apple.com,
                    rcaliman at apple.com,
                    webkit-bug-importer at group.apple.com

1. With Safari TP 208 on macOS 15.2
2. Go to https://www.24joursdeweb.fr
3. Notice the christmas decorations slowly moving
4. open the Web Inspector, go to Elements Tab
5. Click on the icon to change theme, motion, etc.
6. Activate Reduce motion at on.

Expected: Movement stops.

Actual: Movement continues

7. Go to https://www.24joursdeweb.fr/assets/images/header/2024/header.svg (activate reduce motion is stil on in the web inspector)
8. The decorations are not moving.
9. Set Reduce Motion at off
10. The decorations are moving.


The image is called in the HTML by 

```
.home--2024 .hero {
    background: transparent url(/assets/images/header/2024/header.svg) no-repeat 0% 2rem / 240vw auto;
    contain: content;
    overflow: hidden;
}
```

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