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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              <h1>redux-saga polling example</h1>
<div class="controls">
  <button class="controls-item" id="pollStartBtn">Poll Start</button>
  <button class="controls-item" id="pollStopBtn">Poll Stop</button>
  <pre class="controls-item" id="pollingState">Polling false</pre>
</div>
<div class="response">
  <h3 id="responseState"><em>Start polling to see random jokes...</em></h3>
</div>

<script>
// Set up globals
const createSagaMiddleware = ReduxSaga.default;
const { delay } = ReduxSaga;
const { take, put, call , race } = ReduxSaga.effects;
const { createStore, combineReducers, applyMiddleware } = Redux;

// Set up API endpoint to use for the example.
const ENDPOINT = 'https://08ad1pao69.execute-api.us-east-1.amazonaws.com/dev/random_joke';
</script>
            
          
!

CSS

            
              html {
  font-family: sans-serif;
  color: #333;
}

responseState {
  font-weight: 600
}

#responseState em {
  font-weight: 400
}

.controls {
  display: flex;
  margin-bottom: 20px;
}

.controls-item {
  margin-right: 20px;
}

.response {
  background-color: #eee;
  padding: 10px 20px;
}
            
          
!

JS

            
              /**
 * Saga worker.
 */
function* pollSaga(action) {
  while (true) {
    try {
      const { data } = yield call(() => axios({ url: ENDPOINT }));
      yield put(getDataSuccessAction(data));
      yield call(delay, 4000);
    } catch (err) {
      yield put(getDataFailureAction(err));
    }
  }
}

/**
 * Saga watcher.
 */
function* watchPollSaga() {
	while (true) {
  	yield take(POLL_START);
    yield race([
      call(pollSaga),
      take(POLL_STOP)
    ]);
  }
}




/**
 * Set up of Redux and the view layer.
 */

/**
 * ACTION TYPES.
 * - Redux Boilerplate
 */
const POLL_START = 'POLL_START';
const POLL_STOP = 'POLL_STOP';
const GET_DATA_SUCCESS = 'GET_DATA_SUCCESS';
const GET_DATA_FAILURE = 'GET_DATA_FAILURE';


/**
 * Action Creators.
 * - Redux Boilerplate
 */
const pollStartAction = () => ({ type: POLL_START });
const pollStopAction = () => ({ type: POLL_STOP });
const getDataSuccessAction = payload => ({ type: GET_DATA_SUCCESS, payload });
const getDataFailureAction = payload => ({ type: GET_DATA_FAILURE, payload });


/**
 * Reducer.
 * - Redux Boilerplate
 */
const initialState = {
  data: false,
  polling: false,
};

const dataReducer = (state = initialState, action) => {
  switch (action.type) {
    case POLL_START:
      return {
        ...state,
        polling: true,
      }
    case POLL_STOP:
      return {
        ...state,
        polling: false,
      }
    case GET_DATA_SUCCESS:
      return {
        ...state,
        data: action.payload
      };
    default:
      return state;
  }
};


/**
 * Create the store.
 * - Redux Boilerplate
 */
const sagaMiddleware = createSagaMiddleware();

const createStoreWithMiddleware = applyMiddleware(sagaMiddleware)(createStore);
const store = createStoreWithMiddleware(
  dataReducer,
  window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
);

sagaMiddleware.run(watchPollSaga);


/**
 * Handle the view.
 * - Typically would be handled by something like React / Angular etc.
 */
const pollStartBtn = document.getElementById('pollStartBtn');
const pollStopBtn = document.getElementById('pollStopBtn');
const pollingState = document.getElementById('pollingState');
const responseState = document.getElementById('responseState');

pollStartBtn.addEventListener('click', () => {
  store.dispatch(pollStartAction())
});
pollStopBtn.addEventListener('click',() => {
  store.dispatch(pollStopAction());
});

store.subscribe(() => {
  const { data, polling } = store.getState();
  pollingState.textContent = `Polling ${polling}`;

  if (data) {
    responseState.innerHTML = `${data.setup}<br/>— <em>${data.punchline}</em>`;
  }
});
            
          
!
999px

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