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Optional index signature #7118
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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]: anyor[type:string]:Action|Person|Entity?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 keysIf your use case isn't solved by #7029, please post some code so we can understand the scenario. Thanks!
Oh, sorry. Didn't look for already fixed issues, just open :/
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on Jun 19, 2018
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.