bee-select/demo/demolist/Demo4.js

select ui component for react

/**
 * @title 简易级联单选`Select`
 * @description 常用语城市级联的选择。
 */

class Demo4 extends Component {
	constructor() {
		super();
		this.state = {
			cities: cityData[provinceData[0]],
      		secondCity: cityData[provinceData[0]][0],
		}
		this.handleProvinceChange = this.handleProvinceChange.bind(this);
		this.onSecondCityChange = this.onSecondCityChange.bind(this);
	}
	handleProvinceChange(value) {
	    this.setState({
	      cities: cityData[value],
	      secondCity: cityData[value][0],
	    });
	}
	onSecondCityChange(value) {
	    this.setState({
	      secondCity: value,
	    });
	}
	render() {
	    const provinceOptions = provinceData.map(province => <Option key={province}>{province}</Option>);
	    const cityOptions = this.state.cities.map(city => <Option key={city}>{city}</Option>);
	    return (
	      <div>
	        <Select defaultValue={provinceData[0]} style={{ width: 90,marginRight:6 }} onChange={this.handleProvinceChange}>
	          {provinceOptions}
	        </Select>
	        <Select value={this.state.secondCity} style={{ width: 90 }} onChange={this.onSecondCityChange}>
	          {cityOptions}
	        </Select>
	      </div>
	    );
	}
}