What is subscribe in React Redux?

React hook that safely manages subscriptions in concurrent mode . This utility can be used for subscriptions to a single value that are typically only read in one place and may update frequently (e.g. a component that subscribes to a geolocation API to show a dot on a map).

There is no way to subscribe to part of the store when using subscribe directly , but as the creator of Redux says himself – don’t use subscribe directly! For the data flow of a Redux app to really work, you will want one component that wraps your entire app. This component will subscribe to your store.

In Redux, subscriptions are called after the root reducer has returned the new state , so you may dispatch in the subscription listeners. You are only disallowed to dispatch inside the reducers because they must have no side effects.