import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';
function Block() {
return (
<h1>142</h1>
)
}
export default Block;import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import * as serviceWorker from './serviceWorker';
ReactDOM.render(<Block />, document.getElementById('root'));
serviceWorker.unregister();
<script type="text/babel">
function jo() {
return (
<h1>142</h1>
)
}
ReactDOM.render(<jo />, document.getElementById('root'))
</script>
<div id="root"></div>