Function isType

Returns true if action has the same type as action creator. Defines Type Guard that lets TypeScript know payload type inside blocks where isType returned true.

Example

const somethingHappened =
     actionCreator<{foo: string}>('SOMETHING_HAPPENED');

   if (isType(action, somethingHappened)) {
     // action.payload has type {foo: string}
   }
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