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How can React's useContext be used to comprehend the Record type in Typescript?

asked 2022-04-01 11:00:00 +0000

qstack gravatar image

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answered 2021-11-25 23:00:00 +0000

lalupa gravatar image

React's useContext can be used with Typescript's Record type in the following way:

  1. Define the Record type with a generic type parameter for the key and value types:
type MyRecord<K extends string | number | symbol, V> = Record<K, V>;
  1. Define the context interface with the Record type as its generic type parameter:
interface MyContext {
  data: MyRecord<string, string>;
}
  1. Create the context using the createContext function:
const MyContext = createContext<MyContext>({
  data: {}
});
  1. Use the useContext hook to access the context data:
const { data } = useContext(MyContext);
  1. Use the data object as a regular Record in Typescript:
const value = data["key"]; // value has type string
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Asked: 2022-04-01 11:00:00 +0000

Seen: 10 times

Last updated: Nov 25 '21