Learning Redux

Defining action types

Let's think about which actions we need to dispatch while making a request to get all posts from the backend:

• FETCH_POSTS_REQUEST: We dispatch this action immediately when the request begins. The following action can be used to, for example, show a loading indicator while a request is in progress: { type: 'FETCH_POSTS_REQUEST' }

• FETCH_POSTS_SUCCESS: This action is dispatched once the server responds to our request, returning all posts. This action contains an array of posts, which we will store in our application state through a reducer: { type: 'FETCH_POSTS_SUCCESS', posts: [] }
• FETCH_POSTS_FAILURE: If the request fails or the server returns an error status code, we dispatch the following action and handle the error ...