How to listen for specific property changes in Redux store after an action is dispatched

Question

I am currently trying to conceptualize how to handle dispatching an action in a component based on a data change after a dispatch in another component.

Take this scenari

Answer 1

There are two basic approaches: either a middleware that diffs the state after an action is done, or using Redux's low-level store.subscribe API.

The Redux FAQ has an answer that covers this. Also, I keep a categorized list of Redux-related addons and utilities, and that includes a group of existing store change subscription libraries that implement various approaches to listening for data changes.

Answer 2

You may use Redux's mapStateToProps and connect with React's componentDidUpdate(prevProps, prevState, snapshot) hook.

So basically your code could look like this:

const mapStateToProps = (state) => ({ 
   specificProperty: state.specificProperty,
   // any props you need else
});

class YourComponent extends React.Component {
    render() {
      // render your component  
    }

    componentDidUpdate(prevProps, prevState, snapshot) {
        if (prevProps.specificProperty !== this.props.specificProperty) {
            // Do whatever you want
        }
    }
}

YourComponent = connect(mapStateToProps)(YourComponent);