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February 17, 2020 18:05
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CSS, JSX, Component, Props, State, Event, Lifecycle, form // source https://jsbin.com/cinotof
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <title>CSS, JSX, Component, Props, State, Event, Lifecycle, form</title> | |
| <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/[email protected]/babel.min.js"></script> | |
| <style> | |
| $myColor: red; | |
| h1 { | |
| color: $myColor; | |
| } | |
| </style> | |
| <body> | |
| <div id="root"></div> | |
| <script type="text/babel"> | |
| const dt = new Date().getTime(); | |
| class Welcome extends React.Component { | |
| constructor(props) { | |
| super(props); | |
| this.state = { | |
| color: "red", | |
| username: '' | |
| }; | |
| } | |
| changeColor = (mycolor, ev) => { | |
| console.log(ev.target); // event element | |
| this.setState({color: mycolor}); | |
| } | |
| static getDerivedStateFromProps(props, state) { | |
| return {color: props.name }; // getDerivedStateFromProps always run before render | |
| } | |
| myChangeHandler = (event) => { | |
| this.setState({username: event.target.value}); | |
| } | |
| render() {return( | |
| <div> | |
| <h1>Hello, {this.props.name}, {dt}!</h1> | |
| <p style={{color: "green", "background-color": "coral"}}>It is a {this.state.color}</p> | |
| <button type="button" onClick={(ev) => this.changeColor("new color", ev)}>Change color</button> | |
| <form> | |
| <h1>Hello {this.state.username}</h1> | |
| <input type='text' placeholder="Input name here" | |
| onChange={this.myChangeHandler} | |
| /> | |
| </form> | |
| </div> | |
| );} | |
| } | |
| ReactDOM.render(<Welcome name = "White"/>, document.getElementById('root')); | |
| </script> | |
| <script id="jsbin-source-html" type="text/html"><!DOCTYPE html> | |
| <html lang="en"> | |
| <title>CSS, JSX, Component, Props, State, Event, Lifecycle, form</title> | |
| <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/[email protected]/babel.min.js"><\/script> | |
| <style> | |
| $myColor: red; | |
| h1 { | |
| color: $myColor; | |
| } | |
| </style> | |
| <body> | |
| <div id="root"></div> | |
| <script type="text/babel"> | |
| const dt = new Date().getTime(); | |
| class Welcome extends React.Component { | |
| constructor(props) { | |
| super(props); | |
| this.state = { | |
| color: "red", | |
| username: '' | |
| }; | |
| } | |
| changeColor = (mycolor, ev) => { | |
| console.log(ev.target); // event element | |
| this.setState({color: mycolor}); | |
| } | |
| static getDerivedStateFromProps(props, state) { | |
| return {color: props.name }; // getDerivedStateFromProps always run before render | |
| } | |
| myChangeHandler = (event) => { | |
| this.setState({username: event.target.value}); | |
| } | |
| render() {return( | |
| <div> | |
| <h1>Hello, {this.props.name}, {dt}!</h1> | |
| <p style={{color: "green", "background-color": "coral"}}>It is a {this.state.color}</p> | |
| <button type="button" onClick={(ev) => this.changeColor("new color", ev)}>Change color</button> | |
| <form> | |
| <h1>Hello {this.state.username}</h1> | |
| <input type='text' placeholder="Input name here" | |
| onChange={this.myChangeHandler} | |
| /> | |
| </form> | |
| </div> | |
| );} | |
| } | |
| ReactDOM.render(<Welcome name = "White"/>, document.getElementById('root')); | |
| <\/script> | |
| </body> | |
| </html> | |
| </script> | |
| </body> | |
| </html> |
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