The pointer interaction shouldn’t synchronously dispatch an event on initial render

The pointer interaction calls render(null) on the initial render, which I believe calls through to context.dispatchValue, resulting in a figure.dispatchEvent before the generated figure has even been returned. There’s no need to dispatch an event during the initial render, since it’s not possible for external listeners to be registered yet. Avoiding this call would address some compatibility issues in non-browser environments.

Ref. https://github.com/observablehq/plot/discussions/2158#discussioncomment-10512970

Start at the pointer interaction's initial render path and inspect how render(null) reaches context.dispatchValue and figure.dispatchEvent. Done means the initial render no longer dispatches an event before the generated figure is returned, while later pointer interactions still dispatch as expected.