A Bite Of React(1)

<import React from ‘react‘> // core react library, know how to work with component. Create or manage a Dom
<import ReactDOM from ‘react-dom‘> //render component to dom

const App = function(){
    return <div>HI!</div>
}; // this is a component class, could produce a lot of instance.

ReactDOM.render(<App />, document.querySelector(‘.container‘)); //render component into dom
// transpire would translate JSX into javascript
// <App />is a simple instance of component App

const App1 = () => {
    return <div>Hi!</div>;
}
// => equals to keyword:this