![]() Here is a screenshot from the official site's page on Reducers:Įxport default (state = INITIAL_STATE, action=)Įxport default connect(mapStateToProps, mapDispatchToProps)(Library) Īnd finally, we have the index.js where the passed component is wrapped over by the component which passes the store as props.Ĭonst rootElement = document.getElementById("root") Īnd below we have the rendered view of the component. But again, Redux gave an alternative to achieve this by using the Spread Operator. Instead, a copy of it with new/updated values should be created which is usually done using Object.assign(). But to make changes to an existing state, there is some rule to follow in Redux: never mutate a state. Now we define one action type called SET_DATA which updates state variables (like name and books in our example here). The body of a reducer usually consists of a switch statement for all cases of the action types you design. Just below the INITIAL_STATE is the reducer, which actually is a function that takes in the current state of the application and the associated action (we will come to that in the next section) as parameters and returns a new state. Designed to work with Reacts component model. Actions: The actions part of the react-redux basically contains the different actions that are to be performed on. React Redux is maintained by the Redux team, and kept up-to-date with the latest APIs from Redux and React. Here is where your application state is stored as a single object.įor our example, we introduce two state variables name, an (empty) string, and books, an (empty) array. The working of the features in react-redux is explained below: Store: It contains the state of the components which need to be passed to other components. The first thing we do is setup the initial state. It is named that way because it is akin to the Array reduce() method, which takes in an array and returns a single condensed value. REACT WITH REDUX HOW TOThis tutorial is a simplifed step-by-step guide on how to set-up or use Redux with React using a simple example.īefore we start, we install the dependent packages that would be needed to build our React-Redux example code: react-redux, redux and redux-thunk ![]()
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