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Hey @dbaeumer, applicableSpan is simply the span for which signature help should appear on a signature - I believe the idea is that if you request signature help and move your cursor to another location within that span, you should continue seeing the same signature help dialog. I don't know whether this applies to mouse click into a span; I believe it is just for keyboard movement, though I can check and let you know if this is not the case.

For details on applicable spans, see the applicable span calculation for call expressions and for tagged templates.

Apart from the nit about the space after the colon, this looks good to me. I'll let @steveluc give the 👍 though.

This is great. Thanks. Could you consider changing the name to SignatureHelpParameter to SignatureHelpArgs. The rest are named with the Args suffix.

Disregard previous comment. I see the naming is consistent and SignatureHelpParameter is part of the response.

👍

Thanks for all the comments. Will work on the test and fix the typos and provide an updated. pull request.

👍