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[FEATURE]: Support `cliponaxis` for `scattergl` (and other WebGL-based traces that reuse it)

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
55/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Active
Tech stack
javascript

Research direction

Start by reproducing the clipping behavior in the linked CodePen and trace the scattergl entry point responsible for marker clipping. Compare it with scatter's cliponaxis behavior and check which other WebGL-based traces reuse scattergl. Done means exposing cliponaxis for scattergl and confirming that markers can extend beyond the subplot viewport when it is false.

Written by the indexing model from the issue text.

Description

feature
Description

scatter supports the cliponaxis attribute.

scattergl, however, does not expose this attribute, and markers are always clipped at the subplot viewport.

The marker is centered at y = 0, and the part outside the plotting area is clipped.

It would be useful if scattergl supported: cliponaxis: false.

It may also be worth considering because some WebGL-based traces also reuse scattergl.

Minimal reproducible example

https://codepen.io/Lexachoc/pen/dPvWdxa

Dominant language
JavaScript
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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