The concepts you learn will not be as useful going forward
I think they are a bit simpler to start building, and You already linked to some great in-depth comparisons so I'll just share my personal experience/opinion. I also have links to other similar articles in the Redux Side Effects#Side Effect Comparisons section of my React/Redux links list, and I highlighted some of the most popular side effects libraries and their use cases in my ReactBoston talk on the Redux ecosystem. In addition to the posts you linked, I recommend What's the right way to do async operations in Redux?, which compares several different Redux side effects libs. Observables are also great for complex async workflows, and are better if you prefer observables or a pipeline-based sequence of data transformations. They are usually considered to be easily testable, although some people question whether the testing becomes too coupled to the internal logic. Sagas are great for complex async workflows, and better if you prefer reading imperative / sequential code. Thunks are best for complex synchronous logic and simple async logic (like an AJAX call with no response, or just a simple dispatch on success / failure) My answer is that you should use thunks and your choice of sagas or observables. MapStore will mute all the epics whenever corresponding plugin or extension is not rendered on the page.Hi, I'm a Redux maintainer. In other words, if there are Extension1 and Plugin2, both are adding epic called testEpic and both plugin and extensionĪre not added to the current page plugins in pluginsConfig, then epic will become muted.
Whenever new epic is registered it will be in unmuted state by default.Įpic will become muted whenever there is no plugin/extension on the page listing that specific epic in plugin definition. Muted: no reaction to the actions that comes in
data )) ) Epic state: muted / unmutedĪll the epics attached to plugins or extension will be registered once plugin is loaded.Įach registered epic can be in one of two possible states: get ( "MY_DATA" )) // defer gets a function map ( response => dataFetched ( response. SwitchMap operator unsubscribes its observable ( so stops getting events from it ) even if another event comes on the main stream (so in this case another START_COUNTDOWN action).Ĭonst axios = require ( './libs/ajax' ) const fetchDataEpic = ( action$, store ) => action$. takeUntil(Rx.Observable.timer(seconds * 1000)) unsubscribes the observable when the stream passed as function emits a value. This value is used to trigger another action to emit on redux (using an action creator called updateTime, for instance).Īt the end the stream will be closed after the n seconds because of the takeUntil: The timer will emit an incremental value (0, 1, 2. So on the first START_COUNTDOWN the timer starts ( Rx.Observable.interval(1000)). Every value emitted on this stream will be projected on the main flow.
The argument function of switchMap must return an Observable. In this epic, every time START_COUNTDOWN action is performed, the switchMap operator's argument function will be executed. filter (() => isMapLoadConfigurationEnabled ( store.
REDUX OBSERVABLE HOW TO
Muted epics: how to mute internal streamsĬonfiguration of Application Context ManagerĬonst fetchUserEpic = ( action$, store ) => action$. Create complex data flows triggered by actions
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