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October 23, 2018 16:48
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>defaultValue</title> | |
| <meta charset="utf-8"> | |
| </head> | |
| <body> | |
| <div id="app"> | |
| <!-- my app renders here --> | |
| </div> | |
| <script charset="utf-8" crossorigin src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script> | |
| <script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script> | |
| <script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script> | |
| <script type="text/babel"> | |
| class MySelect1 extends React.Component { | |
| render() { | |
| return ( | |
| <select defaultValue="move"> | |
| <option value="stay">Should I stay</option> | |
| <option value="move">or should I go</option> | |
| <option value="trouble">If I stay it will be trouble</option> | |
| </select> | |
| ) | |
| } | |
| } | |
| class MySelect2 extends React.Component { | |
| constructor(params) { | |
| super(params); | |
| this.state = { | |
| value: 'move' | |
| }; | |
| // This binding is necessary to make `this` work in the callback | |
| this._onChange = this._onChange.bind(this); | |
| }; | |
| _onChange(event) { | |
| this.setState({value: event.target.value}); | |
| }; | |
| render() { | |
| return ( | |
| <select value={this.state.value} onChange={this._onChange}> | |
| <option value="stay">Should I stay</option> | |
| <option value="move">or should I go</option> | |
| <option value="trouble">If I stay it will be trouble</option> | |
| </select> | |
| ) | |
| } | |
| } | |
| class MySelect3 extends React.Component { | |
| render() { | |
| return ( | |
| <select defaultValue={["stay", "move"]} multiple={true}> | |
| <option value="stay">Should I stay</option> | |
| <option value="move">or should I go</option> | |
| <option value="trouble">If I stay it will be trouble</option> | |
| </select> | |
| ) | |
| } | |
| } | |
| ReactDOM.render( | |
| <div> | |
| <MySelect1 /> | |
| <MySelect2 /> | |
| <MySelect3 /> | |
| </div> | |
| , | |
| document.getElementById('app') | |
| ); | |
| </script> | |
| </body> | |
| </html> |
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