Fill doesnt work when curves are of type scattegl

[53r1k]

When the type of 2 curves is "scattergl" and there is a fill betweem them, it doesnt work.

Here is a reproducible, minimized codepen: https://codepen.io/GoldBlacky/pen/yyLgOdd

I would also be very happy about a workaround or general direction to try to implement a workaround myself. The reason I need scattergl is because my application is too laggy when using scatter with multiple thousand data points.

Thanks!

[53r1k]

Found a workaround by enclosing the space between the two curves I want to fill in a polygon:

const xPolygon = xValues.concat(xValues.reverse());
const yPolygon = yMax.concat(yMin.reverse());

then for the plotly data, providing this polygon data and filling toself:
x: xPolygon,
y: yPolygon,
type: "scattergl",
mode: "lines",
fill: "toself",
fillcolor: "rgba(0, 0, 0, 0.14)",

[gvwilson]

Thanks @53r1k - glad you found a workaround. Realistically, I don't think we're going to be able to get to this one any time soon, but we'd be happy to prioritize review if you are interested in preparing a PR. Thanks - @gvwilson