与连接反应无状态组件

Question

I want to create an auth HOC that will redirect the user or show the component.

ie:

const AuthExtender = props => {
    if (!props.logged) return <Redirect to="/login" />;

    return <WrappedComponent />;
}

const authCompWithState = connect(state=>({logged:state.logged}))(AuthExtender);

I know this is not right, but this is the idea I want to have:

const MembersPageForLoggedOnly = memberOnlyPageHOC(MemebersPage);

I tried so many version of a function that returns function, but I can't nail it...

Any ideas?

Thanks!

Answer 1

The usual usage of HOC I have seen is it returns a class:

const authExtender = WrappedComponent => {
   return class extends Component {
     render() {
       if(!this.props.loggedIn) {
         return <Redirect to={'/login'} />;
       }

       return <WrappedComponent {...this.props} />;
     }
   }
};

And then:

export default authExtender(SomeComponent);

Answer 2

Using this code, you can create a HOC with just one function and connect it to the store.

 const membersOnly = WrappedComponent => { // render redirect if not logged, else component const comp = ({ logged, ...props }) => { return logged ? <Redirect /> : <WrappedComponent {...props} /> } // connect it to store return connect(state => ({logged: state.logged}))(comp) } // render const HomePageMembersOnly = membersOnly(HomePage) 

you could also compose it separatly.

 const membersOnly = WrappedComponent => ({ logged, ...props }) => { return logged ? <Redirect /> : <WrappedComponent {...props} /> } // use it directly const MembersOnlyHomePage = connect(state => ({logged: state.logged}))(membersOnly(HomePage)) 

fyi remember to always pass unused props to your WrappedComponent .