React (or React.js) is a JavaScript library, designed by the Facebook company, in 2013.
The goal was to streamline and make App. Web single-pages as autonomous and fluid as possible.
Code Examples
We start with very simple codes. The more you progress, page after page, the more sophisticated the scripts will be.
C 0001 - Hello World !
<html>
<script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
<body>
<div id="ex1"></div>
<script type="text/babel">class Hello extends React.Component { render() { return <h1>Hello World !</h1> }}ReactDOM.render(<Hello />, document.getElementById('ex1'))</script>
</body>
</html>
Reproduce this code, choosing one of the compilers below (♦ See DEF.) (don't copy-paste! It would be too easy). They have the same function, just pick up one according to your preferences.
When you copy your code, replace the existing code (by default) with your own.
Warning ! For some of these compilers, you might have to choose the programming language yourself, in a specific menu which is offered to you. Of course, don't forget to click on RUN !
C 0002 - A title and a list
<html>
<script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
<body>
<div id="ex2"></div>
<div id="ex3"></div>
<script type="text/babel">ReactDOM.render(<p>Hello, this is the list...</p>, document.getElementById('ex2'));const myelement = (<table><tr><th>Names :</th></tr><tr><td>Brian</td></tr><tr><td>Lucida</td></tr></table>);ReactDOM.render(myelement, document.getElementById('ex3'));</script>
</body>
</html>
Reproduce this code, choosing one of the compilers below (♦ See DEF.) (don't copy-paste! It would be too easy). They have the same function, just pick up one according to your preferences.
When you copy your code, replace the existing code (by default) with your own.
Warning ! For some of these compilers, you might have to choose the programming language yourself, in a specific menu which is offered to you. Of course, don't forget to click on RUN !
C 0003 - Playing with a value
<html>
<script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
<body>
<div id="ex4"></div>
<script type="text/babel">class Arbre extends React.Component { render() { return <h2>I'm a tree {this.props.color} !</h2>; }}ReactDOM.render(<Arbre color="blue"/>, document.getElementById('ex4'));</script>
</body>
</html>
Reproduce this code, choosing one of the compilers below (♦ See DEF.) (don't copy-paste! It would be too easy). They have the same function, just pick up one according to your preferences.
When you copy your code, replace the existing code (by default) with your own.
Warning ! For some of these compilers, you might have to choose the programming language yourself, in a specific menu which is offered to you. Of course, don't forget to click on RUN !
C 0004 - POPUP
<html>
<script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
<body><div id="ex5"></div>
<script type="text/babel">class Ciblez extends React.Component { click() { alert("Yesss !"); } render() { return ( <button onClick={this.click}>Try !</button> ); }}ReactDOM.render(<Ciblez />, document.getElementById('ex5'));</script>
</body>
</html>
Reproduce this code, choosing one of the compilers below (♦ See DEF.) (don't copy-paste! It would be too easy). They have the same function, just pick up one according to your preferences.
When you copy your code, replace the existing code (by default) with your own.
Warning ! For some of these compilers, you might have to choose the programming language yourself, in a specific menu which is offered to you. Of course, don't forget to click on RUN !
Info+
* Created by Facebook
* Continuous integration
* Written in JavaScript
* Cross-platform
* MIT license
Tools & Levels
Practical cases
CASE 1
BASIC LEVEL
Apply colors to a list of criteria
This little program will allow you to determine which criteria in the list should be colored, and what type of color...
TRY
CASE 2
Create the React environment
This little kit will allow you to set up the tools you need to practice React.
TRY
CASE 3
Create a Web App.
Design and develop a single-page Web App. for customer follow-up, depending on a particular product.
TRY
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