Copy initial value from svg to figure

[Fil]

closes #2045

[mbostock]

Seems correct but I’m curious how the svg.value gets set erroneously in the first place, and what prevents it from subsequently getting set again in the wrong place? (I can investigate this myself by looking at the code, but if you’re willing it would be nice to summarize more of what the underlying cause is here.)

[Fil]

The pointer transform initializes svg.value:

plot/src/interactions/pointer.js

Line 182 in 00610bb

return render(null);

it dispatches here before we actually have a figure:

plot/src/interactions/pointer.js

Line 129 in 00610bb

if (!(i == null && facetState?.size > 1)) context.dispatchValue(i == null ? null : data[i]);

Once the figure has replaced the svg, the value is dispatched correctly.

[mbostock]

Thanks!