[svgwg] refX/refY keyword forms unimplemented and no WPT tests (#1137)

karlcow has just created a new issue for https://github.com/w3c/svgwg:

== refX/refY keyword forms unimplemented and no WPT tests ==
The [marker element](https://w3c.github.io/svgwg/svg2-draft/single-page.html#painting-MarkerElement) has for attributes [refX](https://w3c.github.io/svgwg/svg2-draft/single-page.html#painting-MarkerElementRefXAttribute) and refY.

The specs defines values 
* refX (left | center | right) 
* refY (top | center | bottom) 

alongside `<length-percentage>` | `<number>`.

On the [London F2F - August 2014](https://www.w3.org/2014/08/26-svg-minutes.html#item07), it was decided to add the keywords to the [symbol element](https://w3c.github.io/svgwg/svg2-draft/single-page.html#struct-SymbolElement) too.


A. There are no WPT tests about RefX/RefY on `symbol`
B. There are no WPT tests about the keyword values (left|center|right, top|center|bottom) on both `marker` and `symbol`.
C. There are **no implementations at all in browsers** of these keywords. (12 yearsis t)
D. The SVG2 IDL doesn't expose them either or the prose needs to be aligned with rect/ellipse aka "reflect the computed values". Keyword resolves to  a length at parse time; SVGAnimatedLength exposes only the resolved length.

Please view or discuss this issue at https://github.com/w3c/svgwg/issues/1137 using your GitHub account


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Received on Wednesday, 17 June 2026 15:25:51 UTC