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redux-thunk

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redux-thunk

Thunk middleware for Redux.

  • 2.4.1
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
5.4M
increased by2.7%
Maintainers
3
Weekly downloads
 
Created

What is redux-thunk?

Redux Thunk is a middleware for Redux that allows you to write action creators that return a function instead of an action. This can be used to delay the dispatch of an action, or to dispatch only if a certain condition is met. The inner function receives the store methods `dispatch` and `getState` as parameters.

What are redux-thunk's main functionalities?

Asynchronous Actions

This feature allows for asynchronous actions within Redux. The code sample demonstrates how to create an action that fetches data asynchronously and dispatches different actions based on the result of the fetch.

function fetchData() {
  return (dispatch) => {
    dispatch({ type: 'FETCH_DATA_REQUEST' });
    return fetch('https://api.example.com/data')
      .then(response => response.json())
      .then(json => dispatch({ type: 'FETCH_DATA_SUCCESS', payload: json }))
      .catch(error => dispatch({ type: 'FETCH_DATA_FAILURE', error }));
  };
}

Conditional Dispatching

Redux Thunk allows for conditional dispatching of actions based on the current state or any other condition. The code sample shows how to dispatch an action only if certain conditions are met, using the `getState` method to access the current state.

function updateDataIfNeeded(data) {
  return (dispatch, getState) => {
    if (shouldUpdateData(getState(), data)) {
      dispatch({ type: 'UPDATE_DATA', payload: data });
    }
  };
}

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Package last updated on 26 Nov 2021

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