Accessing redux store inside functions

Edit 1

Some_File.js

import store from './redux/store.js';

function aFunction(){
   var newState =store.getState();
   console.log('state changed');
}

store.subscribe(aFunction)

I am assuming you have created store and reducers as redux expects.

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Original Answer Starts

This is a sort of hack, I don't know what you are doing so I can't say you should or you should not do it, but you can do it this way. I have copy-pasted some of your code with some modifications.

Class XYZ extends React.Component{
     componentWillReceiveProps(props){
       //in your case this.props.storeCopy is redux state.
      //this function will be called every time state changes
     }

     render(){
        return null;
     }
}



function mapStateToProps(state) {
    return {
        storeCopy : state
    };
}

export default function connect(mapStateToProps)(XYZ);

Put this component somewhere at top, may just inside provider, whenever state changes this componentWillReceiveProps of this component will be invoked.

If you have a pure functional component then you can access the redux state directly like this:

import store from './redux/store';

function getStoreDetails() {
   console.log(store.getState());
}