我正在使用react-select在我的react应用程序中定义一个select输入控件。这就是我使用该组件的方式:
<Select
onChange={function(e) {console.log(e)}}
options={[
{value: "sf", label: "San Francisco"},
{value: "nyc", label: "New York City"}
]}
></Select>
在选择任何选项之前,我会看到Select...
占位符作为输入值。选择一个选项后,这不会改变:输入值不会改变,Select...
占位符似乎是所选的“选项”。
我是如何使用该组件的?
答案 0 :(得分:3)
在Select
变量中定义state
值,logChange
函数将返回object
,将value
的{{1}}分配给object
状态变量,它将工作,检查此代码:
class App extends React.Component{
constructor(){
super();
this.state = {value: ''}
}
logChange(val) {
console.log("Selected: " + val.value);
this.setState({value: val.value});
}
render(){
var options = [
{value: 'one', label: 'One' },
{value: 'two', label: 'Two' }
];
return(
<Select
name="form-field-name"
value={this.state.value}
options={options}
onChange={this.logChange.bind(this)}
/>
)
}
}
ReactDOM.render(<App/>, document.getElementById('app'))
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<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<script src="https://unpkg.com/classnames/index.js"></script>
<script src="https://unpkg.com/react-input-autosize/dist/react-input-autosize.js"></script>
<script src="https://unpkg.com/react-select/dist/react-select.js"></script>
<link rel="stylesheet" href="https://unpkg.com/react-select/dist/react-select.css">
<div id='app'/>
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