reactjs - Show Loading Spinner with Axios and React (possible Redux)

Reactjs - Show Loading Spinner with Axios and React (possible Redux)

Showing a loading spinner while fetching data using Axios in a React application, especially when combined with Redux for state management, involves managing the loading state in Redux and updating the UI accordingly. Here's a step-by-step guide on how to achieve this:

Step 1: Set Up Redux

Assuming you have Redux set up in your React application, make sure you have the following in place:

  • Actions: Define action types and action creators for fetching data and updating loading state.
  • Reducers: Handle actions to update the Redux store state, including loading state.
  • Store: Create the Redux store and apply middleware if needed (e.g., Redux Thunk for async actions).

Step 2: Define Redux State

In your Redux state, define a loading state to manage whether data is being fetched:

// Redux State const initialState = { data: null, loading: false, error: null, };

Step 3: Create Redux Actions

Define Redux actions to manage loading state and fetch data using Axios:

// Actions const FETCH_DATA_REQUEST = 'FETCH_DATA_REQUEST'; const FETCH_DATA_SUCCESS = 'FETCH_DATA_SUCCESS'; const FETCH_DATA_FAILURE = 'FETCH_DATA_FAILURE'; // Action Creators const fetchDataRequest = () => ({ type: FETCH_DATA_REQUEST, }); const fetchDataSuccess = (data) => ({ type: FETCH_DATA_SUCCESS, payload: data, }); const fetchDataFailure = (error) => ({ type: FETCH_DATA_FAILURE, payload: error, }); // Async Action Creator using Redux Thunk (or similar middleware) export const fetchData = () => (dispatch) => { dispatch(fetchDataRequest()); axios.get('https://api.example.com/data') .then((response) => { dispatch(fetchDataSuccess(response.data)); }) .catch((error) => { dispatch(fetchDataFailure(error.message)); }); };

Step 4: Update Redux Reducer

Update the Redux reducer to handle loading state:

// Reducer const reducer = (state = initialState, action) => { switch (action.type) { case FETCH_DATA_REQUEST: return { ...state, loading: true, error: null, }; case FETCH_DATA_SUCCESS: return { ...state, loading: false, data: action.payload, error: null, }; case FETCH_DATA_FAILURE: return { ...state, loading: false, error: action.payload, }; default: return state; } };

Step 5: Connect Redux with React Component

Connect your React component to Redux to access the loading state and trigger data fetching:

import React, { useEffect } from 'react'; import { connect } from 'react-redux'; import { fetchData } from './actions'; const App = ({ fetchData, loading, data, error }) => { useEffect(() => { fetchData(); }, [fetchData]); if (loading) { return <div>Loading...</div>; // Show loading spinner here } if (error) { return <div>Error: {error}</div>; // Handle error case } return ( <div> {/* Display fetched data */} <h1>Data: {data ? JSON.stringify(data) : 'No data'}</h1> </div> ); }; const mapStateToProps = (state) => ({ loading: state.loading, data: state.data, error: state.error, }); export default connect(mapStateToProps, { fetchData })(App);

Step 6: Implement Loading Spinner

In the if (loading) condition in your React component, replace the placeholder text with a loading spinner component. You can use a library like react-spinners or create a simple spinner using CSS.

Example Loading Spinner Component (using CSS):

// CSS for spinner /* Add this to your CSS */ .spinner { border: 4px solid rgba(0, 0, 0, 0.1); border-left-color: #3b5998; border-radius: 50%; width: 50px; height: 50px; animation: spin 1s linear infinite; } @keyframes spin { to { transform: rotate(360deg); } } // Loading Spinner Component import React from 'react'; import './Spinner.css'; // Import CSS for spinner const Spinner = () => ( <div className="spinner"></div> ); export default Spinner;

Final Notes

  • Ensure your Redux actions and reducers are correctly set up to manage loading state transitions (FETCH_DATA_REQUEST, FETCH_DATA_SUCCESS, FETCH_DATA_FAILURE).
  • Replace the loading placeholder with a loading spinner component in your React component.
  • Customize the spinner styling or use a library for more advanced spinner designs.
  • Adjust the error handling and data display according to your application's needs.

By following these steps, you can effectively manage and display a loading spinner while fetching data with Axios and Redux in your React application.

Examples

  1. ReactJS show loading spinner on Axios request?

    • Description: Display a loading spinner while waiting for an Axios request to complete in a React component.
    • Code:
      import React, { useState } from 'react'; import axios from 'axios'; const App = () => { const [loading, setLoading] = useState(false); const [data, setData] = useState(null); const [error, setError] = useState(null); const fetchData = async () => { setLoading(true); try { const response = await axios.get('https://api.example.com/data'); setData(response.data); } catch (error) { setError(error); } finally { setLoading(false); } }; return ( <div> <button onClick={fetchData}>Fetch Data</button> {loading && <Spinner />} {error && <div>Error: {error.message}</div>} {data && ( <div> {/* Render data */} </div> )} </div> ); }; const Spinner = () => <div className="spinner"></div>; export default App;

  2. React show loading spinner during API call with Redux?

    • Description: Implement a loading spinner using Redux state management while fetching data via Axios in a React application.
    • Code: Note: This example assumes you have set up Redux and Redux Thunk for async actions.
      // actions.js export const fetchData = () => async (dispatch) => { dispatch({ type: 'FETCH_DATA_REQUEST' }); try { const response = await axios.get('https://api.example.com/data'); dispatch({ type: 'FETCH_DATA_SUCCESS', payload: response.data }); } catch (error) { dispatch({ type: 'FETCH_DATA_FAILURE', payload: error }); } }; // reducers.js const initialState = { loading: false, data: null, error: null, }; const reducer = (state = initialState, action) => { switch (action.type) { case 'FETCH_DATA_REQUEST': return { ...state, loading: true }; case 'FETCH_DATA_SUCCESS': return { ...state, loading: false, data: action.payload, error: null }; case 'FETCH_DATA_FAILURE': return { ...state, loading: false, data: null, error: action.payload }; default: return state; } }; // App.js import React, { useEffect } from 'react'; import { useDispatch, useSelector } from 'react-redux'; import { fetchData } from './actions'; const App = () => { const dispatch = useDispatch(); const { loading, data, error } = useSelector((state) => state); useEffect(() => { dispatch(fetchData()); }, [dispatch]); return ( <div> {loading && <Spinner />} {error && <div>Error: {error.message}</div>} {data && ( <div> {/* Render data */} </div> )} </div> ); }; const Spinner = () => <div className="spinner"></div>; export default App;

  3. React Axios loading spinner with Redux thunk example?

    • Description: Demonstrate how to integrate Redux Thunk middleware to manage async actions (such as Axios calls) and display a loading spinner during the fetch operation.
    • Code: Note: This example assumes the setup of Redux and Redux Thunk.
      // actions.js import axios from 'axios'; export const fetchData = () => { return async (dispatch) => { dispatch({ type: 'FETCH_DATA_REQUEST' }); try { const response = await axios.get('https://api.example.com/data'); dispatch({ type: 'FETCH_DATA_SUCCESS', payload: response.data }); } catch (error) { dispatch({ type: 'FETCH_DATA_FAILURE', payload: error }); } }; }; // reducers.js const initialState = { loading: false, data: null, error: null, }; const reducer = (state = initialState, action) => { switch (action.type) { case 'FETCH_DATA_REQUEST': return { ...state, loading: true }; case 'FETCH_DATA_SUCCESS': return { ...state, loading: false, data: action.payload, error: null }; case 'FETCH_DATA_FAILURE': return { ...state, loading: false, data: null, error: action.payload }; default: return state; } }; // App.js import React, { useEffect } from 'react'; import { useDispatch, useSelector } from 'react-redux'; import { fetchData } from './actions'; const App = () => { const dispatch = useDispatch(); const { loading, data, error } = useSelector((state) => state); useEffect(() => { dispatch(fetchData()); }, [dispatch]); return ( <div> {loading && <Spinner />} {error && <div>Error: {error.message}</div>} {data && ( <div> {/* Render data */} </div> )} </div> ); }; const Spinner = () => <div className="spinner"></div>; export default App;

  4. React show loading spinner while fetching data with Axios?

    • Description: Implement a loading spinner while waiting for data to be fetched using Axios in a React component.
    • Code:
      import React, { useState } from 'react'; import axios from 'axios'; const App = () => { const [loading, setLoading] = useState(false); const [data, setData] = useState(null); const [error, setError] = useState(null); const fetchData = async () => { setLoading(true); try { const response = await axios.get('https://api.example.com/data'); setData(response.data); } catch (error) { setError(error); } finally { setLoading(false); } }; return ( <div> <button onClick={fetchData}>Fetch Data</button> {loading ? <Spinner /> : ( <> {error && <div>Error: {error.message}</div>} {data && ( <div> {/* Render data */} </div> )} </> )} </div> ); }; const Spinner = () => <div className="spinner"></div>; export default App;

  5. React Axios loading spinner example with conditional rendering?

    • Description: Use conditional rendering to display a loading spinner while an Axios request is in progress in a React component.
    • Code:
      import React, { useState } from 'react'; import axios from 'axios'; const App = () => { const [loading, setLoading] = useState(false); const [data, setData] = useState(null); const [error, setError] = useState(null); const fetchData = async () => { setLoading(true); try { const response = await axios.get('https://api.example.com/data'); setData(response.data); } catch (error) { setError(error); } finally { setLoading(false); } }; return ( <div> <button onClick={fetchData}>Fetch Data</button> {loading ? <Spinner /> : null} {error && <div>Error: {error.message}</div>} {data && ( <div> {/* Render data */} </div> )} </div> ); }; const Spinner = () => <div className="spinner"></div>; export default App;

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