Redux Thunk in React Js
Redux is a popular state management library for JavaScript applications, particularly those built with React. Redux Thunk is a middleware for Redux that allows you to write asynchronous logic in your Redux actions. In this blog, we will discuss what Redux Thunk is and how it works.
What is Redux Thunk?
Redux Thunk is a middleware for Redux that enables you to write async logic in your Redux actions. Normally, Redux actions are synchronous functions that return an object with a type property and optional payload. However, with Redux Thunk, you can return a function instead of an object. This function has access to the store's dispatch method, which it can use to dispatch additional actions.
How does Redux Thunk work?
When Redux Thunk middleware is applied to your Redux store, it intercepts any actions that are dispatched. If an action is a function, rather than an object, Redux Thunk will call that function with two arguments: dispatch and getState.
Here's an example of an action using Redux Thunk:
export const fetchUser = (userId) => {
return (dispatch, getState) => {
dispatch({ type: 'FETCH_USER_REQUEST' });
return api.fetchUser(userId)
.then(user => {
dispatch({ type: 'FETCH_USER_SUCCESS', payload: user });
})
.catch(error => {
dispatch({ type: 'FETCH_USER_FAILURE', error });
});
};
};
In this example, the fetchUser action returns a function that takes two arguments: dispatch and getState. Inside this function, we dispatch an initial action to indicate that the request is in progress. We then make an asynchronous call to an API to fetch the user data. Once the data is retrieved, we dispatch a success action with the data payload. If there is an error, we dispatch a failure action with the error object.
The key benefit of Redux Thunk is that it allows you to perform async actions in your Redux actions. This can be useful for fetching data from an API, updating data on a server, or performing other async operations.
In conclusion, Redux Thunk is a middleware for Redux that enables you to write async logic in your Redux actions. It allows you to dispatch additional actions inside your actions, which can be useful for performing async operations. By using Redux Thunk, you can write more complex Redux logic without sacrificing the simplicity and predictability of Redux.
Happy Learning!! Happy Coding!!
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