Optional index signature

[Pajn]

It should be possible to make the index signature optional like this:
export type Actions = {[type: string]?: Action}

If the index signature is not optional (as I'm required to type right now) I get errors when passing parameters with the Actions type as the index signature is missing in the passed object.

[mhegazy]

An index signature is a "constraint" on a type; i do not understand what an optional constraint means..

Can you elaborate on your case, and what you are trying to achieve here.

In your example, all properties should be Action; and if not, what should they be? why not define the index signature in a more permissive fashion, i.e [type:string]: any or [type:string]:Action|Person|Entity?

[Pajn]

I currently get the error "Index signature is missing in type", what I want to constrain is that all values are Action, not that the passed object allows setting additional keys

[RyanCavanaugh]

If your use case isn't solved by #7029, please post some code so we can understand the scenario. Thanks!

[Pajn]

Oh, sorry. Didn't look for already fixed issues, just open :/