[Webkit-unassigned] [Bug 252903] [SVG] The `getBoundingBox` of a non-empty SVG element is 0x0

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=252903

--- Comment #1 from cathiechen <cathiechen at igalia.com> ---
According to [1],

> Web content can also contain SVG elements. SVG elements that do not have associated CSS layout boxes define bounding box instead of a content box. Content rect for the SVGGraphicsElements without CSS layout boxes is a rect whose:
> width is bounding box width
> height is bounding box height

So from ResizeObserver size, it is correct to call `downcast<SVGElement>(*m_target).getBoundingBox()` in `ResizeObservation::computeObservedSizes()`.

I'll leave this bug to an SVG Expert.

[1] https://drafts.csswg.org/resize-observer/

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