How to debug saga effects using Redux DevTools

Question

Can you tell me How to debug saga effects using Redux DevTools?

Answer 1

To debug Redux-Saga effects using Redux DevTools, follow these steps:

1. Install Redux DevTools:

Ensure you have the Redux DevTools extension installed in your browser.

Chrome: Redux DevTools

Firefox: Redux DevTools

2. Enable Redux DevTools in Store:

Configure your store to enable Redux DevTools by adding the following code:

const store = createStore(

  rootReducer,

  window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__(),

  applyMiddleware(sagaMiddleware)

);

3. Monitor Actions in DevTools:

Open Redux DevTools in the browser developer tools. You will see:

Actions: All actions dispatched, including those triggered by saga effects.

State: The current state after each action.

4. Use redux-saga-logger for Detailed Logs (Optional):

For better debugging, install redux-saga-logger to log saga activity:

npm install redux-saga-logger

Then add it to your middleware:

import createSagaLogger from 'redux-saga-logger';

const sagaLogger = createSagaLogger();

const store = createStore(

  rootReducer,

  applyMiddleware(sagaMiddleware, sagaLogger)

);

This will log detailed saga execution in the console, making it easier to trace effects.

5. Trace Saga Effects:

In DevTools, trace how actions dispatched by sagas affect the state. Although Redux DevTools won't show saga internals (like call, put), you can see the actions triggered by them.