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Class Component --> Expecting string/class/function got object --> component pass to other component -->react

// -----App.js
import logo from './logo.svg';
import './App.css';
import Navbar from './components/Navbar';
import News from './components/News';
import NewsItem from './components/NewsItem';
function App() {
return (
<div>
<Navbar />
<News />
</div>
);
}
export default App;
// ----- News.js
import React, { Component } from 'react'
import NewsItem from './NewsItem';
export class News extends Component {
render() {
return (
<div>
<NewsItem />
</div>
)
}
}
export default News
//----- NewsItem.js
import React, { Component } from 'react'
export class NewsItem extends Component {
render() {
return (
<div>
NewItem component
</div>
)
}
}
export default NewsItem
I am new to react and trying to learn the basics.I tried to resolve the issue but couldn't find out the actual cause. I tried to search same issue over the internet but can't find any. All though the error msg is same but situation is different.
As you can see the NewsItem.js component is passed to News.js. Is it ok to pass a class component to another class component as a return type?
I'm getting the error as shown in img.
enter image description here

Try to remove export before defining the class
class News extends Component ...
class NewsItem extends Component ...
You are already default exporting it at the bottom

How to solve import error after npm start

Just started using react and i am following a tutorial. I have the same code as him but i am getting the following error.
./src/index.js
Attempted import error: './components/App' does not contain a default export (imported as 'App')###
Here are my index and component file.
my index.js file
import React from 'react';
import ReactDOM from 'react-dom';
import App from './components/App';
ReactDOM.render(
<App/ >,document.getElementById('root')
)
my App.js
import React, {Component} from 'react';
class App extends Component {
render(){
return(
<div>Ageteller Component</div>
)
}
}

You need to export your App component.
Under the component put export default App
It should look like:
import React, {Component} from 'react';
class App extends Component {
render(){
return(
<div>Ageteller Component</div>
)
}
}
export default App

export the App Component
Try following
import React, {Component} from 'react';
export default class App extends Component {
render(){
return(
<div>Ageteller Component</div>
)
}
}

Error import component

I have this error when i import my component
Module not found: Can't resolve '../src/components/Menu' in '/Users/userName/Documents/folder/repository/Project/src/pages/Home'
src
components
Menu
Menu.css
Menu.js
pages
Home.css
Home.js
Menu.js
import React, { Component } from 'react';
import './Menu.css';
class Menu extends Component {
render() {
return (
<div className="menu">
<h1>Je suis un Menu</h1>
</div>
);
}
}
export default Menu;
Home.js
import React, { Component } from 'react';
import './Home.css';
import Menu from './../components/Menu';
class Home extends Component {
constructor(props) {
super(props);
this.state = {
msg: 'Hello from the state of Home'
}
}
render() {
return (
<div className="home">
<h1 className="text">Welcome to the Home Page</h1>
<p>{this.state.msg}</p>
<Menu/>
</div>
);
}
}
export default Home;

You need to import from one level deeper:
import Menu from './../components/Menu/Menu';
You have a folder called Menu and the file you want is inside called Menu.js.

That's because '../src/components/Menu' doesn't point to your file.
Either use the path
'../src/components/Menu/Menu'
Or, if you want to use your original path, rename your Menu.js file to index.js.
In my experience the latter tends to be more popular due to it's inclusion in the hugely useful Airbnb JSX style guide.

Import css files and react components in a create-react-app application?

I'm just starting with react.js and create-react-app application so excuse me if this is an obvious question.
My 'src' folder structure is like this:
scr/
....components/
........ComponentA.jsx
........Componentb.jsx
....styles/
........ComponentA.css
....App.css
....App.js
....App.test.js
....index.css
....index.js
...OTHER DEFAULT FILES
In App.js I have this:
import React, { Component } from 'react';
import ComponentA from './components/ComponentA';
class App extends Component {
render() {
return (
<div className="App">
<ComponentA />
</div>
);
}
}
export default App;
In ComponentA I have this:
import React, { Component } from 'react';
import './styles/ComponentA.css';
import ComponentB from './components/ComponentB';
class ComponentA extends Component {
render() {
return (
<div className="componentAStyle">
<ComponentB />
</div>
);
}
}
export default ComponentA;
In ComponentB I have this:
import React, { Component } from 'react';
class ComponentB extends Component {
render() {
return (
<div>
<h1>Hello from ComponentB</h1>
</div>
);
}
}
export default ComponentB;
What I'm trying to do is just import ComponentB from ComponentA and also import the style for ComponentA but all this fall showing the following message:
Failed to compile
./src/components/ComponentA.jsx
Module not found: Can't resolve './styles/ComponentA.css' in 'C:\xampp\htdocs\custom-k39\src\components'
This error occurred during the build time and cannot be dismissed.
And if I remove the css import there is another error message:
Failed to compile
./src/components/ComponentA.jsx
Module not found: Can't resolve './components/ComponentB' in 'C:\xampp\htdocs\custom-k39\src\components'
This error occurred during the build time and cannot be dismissed.
How can I import another component from another component and its respective css?
Thanks.

You need to make the paths you are importing are relative to the current location of the file doing the import.
The correct imports would be
 Component A
import React, { Component } from 'react';
import '../styles/ComponentA.css';
import ComponentB from './ComponentB';
You can see this working at https://glitch.com/edit/#!/trashy-unicorn.
(Click on Show Live in top left hand corner.)
Currently what is happening with your error is
import ComponentB from './components/ComponentB';
is is looking in the path
src/components/components/ComponentB
which does not exist and so gives you an error. Same thing is happening with your styles.
Hope this helps.

Alt "connectToStores" deprecated in React/Flux App?

I am building a small chat app with React and Flux via a tutorial, however the tutorial seems to be out of date as it is using a method from Alt (used with Flux) that throws the following error:
Cannot resolve module 'alt/utils/connectToStores'
...which I believe is coming from the line with #connectToStores. Below is my code. I looked into this issue and it seems like Alt was broken up into smaller packages, one of them being Alt-React (which is stumping me completely). My question is, how can I use this method in an up-to-date manner?
import React from 'react';
import mui from 'material-ui';
import MessageList from './MessageList.jsx';
import MessageBox from './MessageBox.jsx';
import Login from './Login.jsx';
import ChannelList from './ChannelList.jsx';
import connectToStores from 'alt/utils/connectToStores';
import ChatStore from '../stores/ChatStore';
// Material UI
import * as Colors from 'material-ui/lib/styles/colors';
import AppBar from 'material-ui/lib/app-bar';
import getMuiTheme from 'material-ui/lib/styles/getMuiTheme';
#connectToStores // es7 decorator with deprecated 'connectToStores'
class App extends React.Component {
constructor() {
super();
}
static getStores() {
return [ChatStore];
}
static getPropsFromStores() {
return ChatStore.getState();
}
static childContextTypes = {
muiTheme: React.PropTypes.object
}
getChildContext() {
return {
muiTheme: getMuiTheme({
primary1Color: Colors.blue500,
primary2Color: Colors.blue700,
primary3Color: Colors.blue100,
accent1Color: Colors.pink400
})
};
}
render() {
var view = <Login />;
if (this.props.user) {
view = (
<div>
<div id="content-container">
<ChannelList />
<MessageList />
</div>
<MessageBox />
</div>
);
}
return (
<div>
<AppBar title="Chat App"/>
{{view}}
</div>
);
}
}
export default App;

The Alt Utils libraries have all been moved into a separate package at https://github.com/altjs/utils
Once installed
npm i --save-dev alt-utils
You can access the same libraries as the tutorial requires using:
import connectToStores from 'alt-utils/lib/connectToStores';
import {decorate, bind, datasource} from 'alt-utils/lib/decorators';