Can I use autocomplete without implementing a parser (or language)?

[marijn]

@tonyonodi

Which type checks, but doesn’t seem to work

That defines an anonymous facet which is then never accessed again, so it won’t have any effect, indeed.

You can use something like EditorState.languageData.of(() => ({autocomplete: myCompletions})) as an extension to add language data for all languages. Or use the override option to autocompletion().