Salman Salman - 1 month ago 42
React JSX Question

Invalid child context `store` of type `function` supplied to `Provider`, expected `object`

I am trying to connect the state in the reducers to the components in my react components.
Here is the code of the reducer is in

reducer_books.js
:

export default function(){
return [
{title:'A'},
{title:'E'}
];
}


Then, i added it to the combine reducer in
index.js
:

import {combineReducers} from 'redux';
import BookReducer from './reducer_books';


const rootReducer= combineReducers({
books:BookReducer
});

export default rootReducer;


At the end i tried to add it in the parent component:

import State from './reducer/index';
import { Provider } from 'react-redux';

ReactDOM.render(
<Provider store={State}>
<App />
</Provider>, document.getElementById('root'));


And in the target component i have:

import React,{Component} from 'react';
import {connect} from 'react-redux';

class BookList extends Component{
renderList(){
return this.props.books.map((book)=>{
<li key={book.title}>{book.title}</li>
});
}

render(){

return(
<div>
<ul>
{this.renderList()}
</ul>
</div>);
}
}

function mapStateToProps(state){
return{
books:state.books
};
}

export default connect(mapStateToProps)(BookList);


Unfortunately, it complains with:

Warning: Failed prop type: Invalid prop `store` of type `function` supplied to `Provider`, expected `object`.
in Provider (at index.js:11)
Warning: Failed childContext type: Invalid child context `store` of type `function` supplied to `Provider`, expected `object`.
in Provider (at index.js:11)
Warning: Failed context type: Invalid context `store` of type `function` supplied to `Connect(BookList)`, expected `object`.
in Connect(BookList) (at App.js:35)
in div (at App.js:33)
in div (at App.js:32)
in App (at index.js:12)
in Provider (at index.js:11)
Uncaught TypeError: _this.store.getState is not a function
Error: Attempted to update component `Connect(BookList)` that has already been unmounted (or failed to mount)

Answer

In your example I don't see where you configure Store, I suppose that you missed this step

import reducers from './reducer/index';
import { Provider } from 'react-redux';
import { createStore } from 'redux';

const Store = createStore(reducers);

ReactDOM.render(
  <Provider store={ Store }>
    <App />
  </Provider>, document.getElementById('root')
);