What is thunk in react?

The thunk can be used to delay the dispatch of an action, or to dispatch only if a certain condition is met . If Redux Thunk middleware is enabled, any time you attempt to dispatch a function instead of an action object, the middleware will call that function with dispatch method itself as the first argument.

Redux Thunk is a middleware that lets you call action creators that return a function instead of an action object . That function receives the store’s dispatch method, which is then used to dispatch regular synchronous actions inside the function’s body once the asynchronous operations have been completed.8 Eki 2020

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A thunk is another word for a function . But it’s not just any old function. It’s a special (and uncommon) name for a function that’s returned by another.