docs: empty version picker on some pages

[chris--young]

• Version: 8.5.0
• Platform: n/a
• Subsystem: n/a

The version picker I added to the docs recently does not properly account for pages without the <-- introduced_in --> tag, or pages with the tag but without multiple version of the doc. The n-api docs are a good example of this. The version drop down is there, but has no options when you click on it.

Affected pages: async_hooks, n-api, deprecations, esm, http2, inspector, intl, perf_hooks, tracing

I already started working on a fix for this and will open a pr later tonight.

[refack]

@chris--young what's you idea for solution? Intuitively I'd go with a "available in current version only" (or something similar) placeholder instead of the drop down.

P.S. How much work would it be to add minor versions as well (maybe only relevant minor when new feature were added based on the added YAML tag). For example 😉

node/doc/api/n-api.md

Lines 3400 to 3408 in cb94905

	### napi_adjust_external_memory
	<!-- YAML
	added: v8.5.0
	-->
	```C
	NAPI_EXTERN napi_status napi_adjust_external_memory(napi_env env,
	int64_t change_in_bytes,
	int64_t* result);
	```

[chris--young]

@refack the change i have now just doesnt display the drop down at all if there arent multiple version to pick from.

including minor version should be doable but it will probably take a bit more work. i think itd be best to do that in a separate pr so it doesnt block fixing this bug

[refack]

@refack the change i have now just doesnt display the drop down at all if there arent multiple version to pick from.

including minor version should be doable but it will probably take a bit more work. i think itd be best to do that in a separate pr so it doesnt block fixing this bug

Agreed.