var MySelect = React.createClass({
change: function(){
return document.querySelector('#lang').value;
},
render: function(){
return(
<div>
<select id="lang">
<option value="select" onChange={this.change}>Select</option>
<option value="Java" onChange={this.change}>Java</option>
<option value="C++" onChange={this.change}>C++</option>
</select>
<p></p>
<p value={this.change}></p>
</div>
);
}
});
React.render(<MySelect />, document.body);
onChange
事件不起作用。
发布于 2019-07-18 17:28:30
React Hooks (16.8+):
const Dropdown = ({
options
}) => {
const [selectedOption, setSelectedOption] = useState(options[0].value);
return (
<select
value={selectedOption}
onChange={e => setSelectedOption(e.target.value)}>
{options.map(o => (
<option key={o.value} value={o.value}>{o.label}</option>
))}
</select>
);
};
发布于 2016-05-09 13:57:20
import React, { PureComponent, Fragment } from 'react';
import ReactDOM from 'react-dom';
class Select extends PureComponent {
state = {
options: [
{
name: 'Select…',
value: null,
},
{
name: 'A',
value: 'a',
},
{
name: 'B',
value: 'b',
},
{
name: 'C',
value: 'c',
},
],
value: '?',
};
handleChange = (event) => {
this.setState({ value: event.target.value });
};
render() {
const { options, value } = this.state;
return (
<Fragment>
<select onChange={this.handleChange} value={value}>
{options.map(item => (
<option key={item.value} value={item.value}>
{item.name}
</option>
))}
</select>
<h1>Favorite letter: {value}</h1>
</Fragment>
);
}
}
ReactDOM.render(<Select />, window.document.body);
发布于 2020-04-15 13:31:53
如果您使用select作为内联到其他组件,那么您也可以使用如下所示。
<select onChange={(val) => this.handlePeriodChange(val.target.value)} className="btn btn-sm btn-outline-secondary dropdown-toggle">
<option value="TODAY">Today</option>
<option value="THIS_WEEK" >This Week</option>
<option value="THIS_MONTH">This Month</option>
<option value="THIS_YEAR">This Year</option>
<option selected value="LAST_AVAILABLE_DAY">Last Availabe NAV Day</option>
</select>
在使用select的组件上,定义如下处理onChange的函数:
handlePeriodChange(selVal) {
this.props.handlePeriodChange(selVal);
}
https://stackoverflow.com/questions/28868071
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