A recipe for polling an API in redux-saga

saga-polling.js

export function* main() {
 const { payload } = yield take(SOME_START_SIGNAL);
 const watcherInstance = yield fork(updateResource, payload);

 // cancel task instance on location change
 yield take(LOCATION_CHANGE);
 yield cancel(watcherInstance); 
}

function* updateResource(id) {
 const result = yield call(pollAPI, id);
 yield put(taskSuccess(result));
}

function* pollAPI(id) {
  while (true) {
    try {
      const result = yield call(fetchData, id);
      return result;
    } catch (error) {
      yield put(taskFailure(error));
      yield call(delay, 5000);
    }
  }
}

function fetchData(id) {
 // return fetch(url, {id});
}