[Exam] Tổng quát kiến thức ReactJS

#App.css

.App {
  text-align: center;
}

.App-logo {
  height: 40vmin;
  pointer-events: none;
}

@media (prefers-reduced-motion: no-preference) {
  .App-logo {
    animation: App-logo-spin infinite 20s linear;
  }
}

.App-header {
  background-color: #282c34;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: calc(10px + 2vmin);
  color: white;
}

.App-link {
  color: #61dafb;
}

@keyframes App-logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.form-group {
  margin-bottom: 20px;
}

#App.js

import logo from './logo.svg';
import './App.css';

import Home from './Home';
import Register from './Register';
import Info from './Info';

// B1. Nhung thu vien su dung
import {
  Routes,
  Route
} from "react-router-dom";


function App() {
  return (
    <>
      <Routes>
        <Route path="/" element={<Home/>}/>
        <Route path="/register" element={<Register/>}/>
        <Route path="/info" element={<Info/>}/>
      </Routes>
    </>
  );
}

export default App;

#DataMgr.js

class DataMgr {
	user = {"fullname": "", "email": "", "phone_number": ""}

	saveUser = function(user) {
		this.user = user

		let json = JSON.stringify(user)
		localStorage.setItem('user', json)
	}

	loadData = function() {
		let json = localStorage.getItem('user')
		if(json == null || json == "") {
			return
		}

		this.user = JSON.parse(json)
	}
}

const data = new DataMgr()
export default data

#Home.js

import logo from './logo.svg';
import './App.css';
import React, { useState, useEffect } from 'react';

function Home() {
  const [fullname, setFullname] = useState("")
  const [email, setEmail] = useState("")
  const [phoneNumber, setPhoneNumber] = useState("")
  const [isRegister, setRegister] = useState(true)

  function saveData() {
    setRegister(false)
  }

  return (
    <>
      {isRegister && <div className="container">
        <div className="card">
          <div className="card-header bg-info text-white">
            Nhap thong tin nguoi dung
          </div>
          <div className="card-body">
            <div className="form-group">
              <label>Ten: </label>
              <input type="text" name="fullname" className="form-control" placeholder="Nhap ten" value={fullname} onChange={(e) => setFullname(e.target.value)}/>
            </div>
            <div className="form-group">
              <label>Email: </label>
              <input type="email" name="email" className="form-control" placeholder="Nhap email" value={email} onChange={(e) => setEmail(e.target.value)}/>
            </div>
            <div className="form-group">
              <label>Ten: </label>
              <input type="tel" name="phone_number" className="form-control" placeholder="Nhap SDT" value={phoneNumber} onChange={(e) => setPhoneNumber(e.target.value)}/>
            </div>
            <div className="form-group">
              <button className="btn btn-success" onClick={saveData}>Luu</button>
            </div>
          </div>
        </div>
      </div>}
      {!isRegister && <div className="container">
        <table className="table table-bordered">
          <tr>
            <th>Ten: </th>
            <td>{fullname}</td>
          </tr>
          <tr>
            <th>Email: </th>
            <td>{email}</td>
          </tr>
          <tr>
            <th>SDT: </th>
            <td>{phoneNumber}</td>
          </tr>
        </table>
        <p onClick={(e) => setRegister(true)}>Hien thi dang ky</p>
        <p><a href="register">Tinh nang rieng [Register]</a></p>
      </div>}
    </>
  );
}

export default Home;

#index.css

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

#index.js

import React from 'react';
import ReactDOM from 'react-dom/client';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';
import "bootstrap/dist/css/bootstrap.css";
import "bootstrap/dist/js/bootstrap.bundle.js";
import {BrowserRouter as Router}  from "react-router-dom";

const root = ReactDOM.createRoot(document.getElementById('root'));
root.render(
  <React.StrictMode>
    <Router>
    	<App />
    </Router>
  </React.StrictMode>
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();

#Info.js

import logo from './logo.svg';
import './App.css';
import React, { useState, useEffect } from 'react';
import { useNavigate } from "react-router-dom";
import DataMgr from './DataMgr';

function Info() {
  const [user, setUser] = useState({"fullname": "", "email": "", "phone_number": ""})

  useEffect(() => {
  	return () => {
  		DataMgr.loadData()

  		setUser(DataMgr.user)
  	};
  }, [])

  return (
    <>
    	<div className="container">
			<table className="table table-bordered">
				<tr>
					<th>Ten: </th>
					<td>{user.fullname}</td>
				</tr>
				<tr>
					<th>Email: </th>
					<td>{user.email}</td>
				</tr>
				<tr>
					<th>SDT: </th>
					<td>{user.phone_number}</td>
				</tr>
			</table>
			<p><a href="register">Quay lai</a></p>
		</div>
    </>
  );
}

export default Info;

#logo.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3"><g fill="#61DAFB"><path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/><circle cx="420.9" cy="296.5" r="45.7"/><path d="M520.5 78.1z"/></g></svg>

#Register.js

import logo from './logo.svg';
import './App.css';
import React, { useState, useEffect } from 'react';
import { useNavigate } from "react-router-dom";
import DataMgr from './DataMgr';

function Register() {
  const navigate = useNavigate();

  const [fullname, setFullname] = useState("")
  const [email, setEmail] = useState("")
  const [phoneNumber, setPhoneNumber] = useState("")

  function saveData() {
    DataMgr.saveUser({
      "fullname": fullname,
      "email": email,
      "phone_number": phoneNumber
    })

    navigate('/info')
  }

  return (
    <div className="container">
      <div className="card">
        <div className="card-header bg-info text-white">
          Nhap thong tin nguoi dung
        </div>
        <div className="card-body">
          <div className="form-group">
            <label>Ten: </label>
            <input type="text" name="fullname" className="form-control" placeholder="Nhap ten" value={fullname} onChange={(e) => setFullname(e.target.value)}/>
          </div>
          <div className="form-group">
            <label>Email: </label>
            <input type="email" name="email" className="form-control" placeholder="Nhap email" value={email} onChange={(e) => setEmail(e.target.value)}/>
          </div>
          <div className="form-group">
            <label>Ten: </label>
            <input type="tel" name="phone_number" className="form-control" placeholder="Nhap SDT" value={phoneNumber} onChange={(e) => setPhoneNumber(e.target.value)}/>
          </div>
          <div className="form-group">
            <button className="btn btn-success" onClick={saveData}>Luu</button>
          </div>
        </div>
      </div>
    </div>
  );
}

export default Register;

#reportWebVitals.js

const reportWebVitals = onPerfEntry => {
  if (onPerfEntry && onPerfEntry instanceof Function) {
    import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
      getCLS(onPerfEntry);
      getFID(onPerfEntry);
      getFCP(onPerfEntry);
      getLCP(onPerfEntry);
      getTTFB(onPerfEntry);
    });
  }
};

export default reportWebVitals;