ReatcJS: JSX trong ReactJS hiển thị dữ liệu

Hiển thị dữ liệu bằng định nghĩa jsx

ReatcJS 2018

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
// import App from './App';
// import registerServiceWorker from './registerServiceWorker';

const user = {
    name: "Antonio",
    email: "Antonio.@gmail.com"
}
const element = < h3 > Name: { user.name } Email: { user.email } < /h3>; // {} chính là jsx
ReactDOM.render(element, document.getElementById('root'));

// ReactDOM.render(<App />, document.getElementById('root'));
// registerServiceWorker();

Thêm bootstrap 4 vào để dùng thử className

CDN Bootstrap 4

ReatcJS 2018

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>

Sử dụng thẻ class

ReatcJS 2018

const user = {
  name: "Antonio",
  email: "Antonio.@gmail.com"
}
//const element = <h3>Name: {user.name} Email: {user.email}</h3>;
const element = (
  <div className="container">
      <h2 className="text-danger">Hello world</h2>
      <h3 className="text-primary">Name: {user.name} Email: {user.email}</h3>
  </div>
)
ReactDOM.render(element,document.getElementById('root'));

Sử dụng setInterval() update time!

ReatcJS 2018

function UpdateTime(){
  const element = (
    <div className="container">
        <h2 className="text-danger">Hello world</h2>
        <h3 className="text-primary">Date: {new Date().toLocaleTimeString()}</h3>
    </div>
  )
  ReactDOM.render(element,document.getElementById('root'));
}

setInterval(UpdateTime, 1000);