react error

ERROR 1

import React, { Component } from 'react';

->  const App = React.createClass({
    "displayName":'App',
    getDefaultProps(){
        return {
            totalStars:5
        }
    },
//omit following code

__WEBPACK_IMPORTED_MODULE_0_react___default.a.createClass is not a function

createClass() function has been deprecated after v1.6

solution

class App extends Component{
}

---

Erro2

class App extends React.component{
    constructor(props){
        super(props)
        this.state={
            starSelected:0
        }
    }

TypeError: Super expression must either be null or a function, not undefined

it should be React.Component, not component

class App extends Component{
}

---

error3

import {Component} from 'react'

import ColorForm from './component/ColorForm'

class App extends Component{

    render(){
        return (
        

        )
    }

}

'React' must be in scope when using JSX

react impose that react must be imported into current module if you want to use JSX syntax in module

import React,{Component} from 'react'

---

error4

class App extends Component{

    render(){
        return (
            
            
        )
    }
}

Adjacent JSX elements must be wrapped in an enclosing tag 

render() of component class should only return a single react element at a time

class App extends Component{

    render(){
        return (
                

            
            
                
        )
    }
}