How to use `useSelector` in a class based component? React, Redux

Question

I wanna get the data from my Redux storage, not an error :)

In a function based component I always do like this

...

import { useSelector } from 'react-redux';

export deafult function App(...){
  ...

  const someData = useSelector(state => state.someData);

  ...
  return (...)
}
...

But when it comes to a class based component I want smth like this, but I get an error :(

...
import { useSelector } from 'react-redux';

export default class App  extends Component {
  constructor(...){
    ...
    
    const someData = useSelector(state => state.someData);

    ...
  }

  render(...)
}
...

Andrej Kitanović · Accepted Answer · 2020-10-22 23:34:44Z

7

Hooks only works with functional components

Instead of useSelector you can pass you props from react-redux like this

import React from 'react'
import {connect} from 'react-redux'

class App extends React.Component{
...

//Your data from react-redux can be called like this.props.someData
const someData = this.props.someData;

...
}

const mapStateToProps = state => {
     return {
         someData: state.someData
     }
}

export default connect(mapStateToProps)(App)

answered Oct 22, 2020 at 23:34

Andrej Kitanović

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1 Comment

enjoi4life411 Over a year ago

So the const is to be defined in the render method? Also the attribute i set in the redux store is undefined. Your comment isnt too clear

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