How can I integrate Redux Sagas with TypeScript?

How can I integrate Redux Sagas with TypeScript?

To integrate Redux Sagas with TypeScript, you need to define your saga functions and use TypeScript types for actions and state.

Can you show me a simple example of a saga in TypeScript?

Sure! Here's a basic example:

import { call, put, takeEvery } from 'redux-saga/effects';
import { fetchData } from './api';

function* fetchDataSaga() {
    try {
        const data = yield call(fetchData);
        yield put({ type: 'FETCH_SUCCESS', payload: data });
    } catch (error) {
        yield put({ type: 'FETCH_FAILURE', payload: error });
    }
}

export function* watchFetchData() {
    yield takeEvery('FETCH_REQUEST', fetchDataSaga);
}

What types do I need to define for actions?

You should define action types as constants and create interfaces for your action objects. For example:

export const FETCH_REQUEST = 'FETCH_REQUEST';
export const FETCH_SUCCESS = 'FETCH_SUCCESS';
export const FETCH_FAILURE = 'FETCH_FAILURE';

interface FetchRequestAction {
    type: typeof FETCH_REQUEST;
}

interface FetchSuccessAction {
    type: typeof FETCH_SUCCESS;
    payload: any;
}

interface FetchFailureAction {
    type: typeof FETCH_FAILURE;
    payload: Error;
}

export type ActionTypes = FetchRequestAction | FetchSuccessAction | FetchFailureAction;

How do I connect the saga middleware to my Redux store?

You can connect the saga middleware by creating the store with applyMiddleware. Here's an example:

import { createStore, applyMiddleware } from 'redux';
import createSagaMiddleware from 'redux-saga';
import rootReducer from './reducers';
import rootSaga from './sagas';

const sagaMiddleware = createSagaMiddleware();
const store = createStore(rootReducer, applyMiddleware(sagaMiddleware));

sagaMiddleware.run(rootSaga);