Select选择器

下拉选择器。

何时使用

• 弹出一个下拉菜单给用户选择操作，用于代替原生的选择器，或者需要一个更优雅的多选器时。

• 当选项少时（少于 5 项），建议直接将选项平铺，使用 Radio 是更好的选择。

代码演示

基本使用

基本使用。

import { Select } from 'antd';
const { Option } = Select;
function handleChange(value) {
  console.log(`selected ${value}`);
}
ReactDOM.render(
  <div>
    <Select defaultValue="lucy" style={{ width: 120 }} onChange={handleChange}>
      <Option value="jack">Jack</Option>
      <Option value="lucy">Lucy</Option>
      <Option value="disabled" disabled>
        Disabled
      </Option>
      <Option value="Yiminghe">yiminghe</Option>
    </Select>
    <Select defaultValue="lucy" style={{ width: 120 }} disabled>
      <Option value="lucy">Lucy</Option>
    </Select>
    <Select defaultValue="lucy" style={{ width: 120 }} loading>
      <Option value="lucy">Lucy</Option>
    </Select>
  </div>,
  mountNode,
);

多选

多选，从已有条目中选择。

import { Select } from 'antd';
const { Option } = Select;
const children = [];
for (let i = 10; i < 36; i++) {
  children.push(<Option key={i.toString(36) + i}>{i.toString(36) + i}</Option>);
}
function handleChange(value) {
  console.log(`selected ${value}`);
}
ReactDOM.render(
  <Select
    mode="multiple"
    style={{ width: '100%' }}
    placeholder="Please select"
    defaultValue={['a10', 'c12']}
    onChange={handleChange}
  >
    {children}
  </Select>,
  mountNode,
);

定制回填内容

使用 optionLabelProp 指定回填到选择框的 Option 属性。

import { Select } from 'antd';
const { Option } = Select;
function handleChange(value) {
  console.log(`selected ${value}`);
}
ReactDOM.render(
  <Select
    mode="multiple"
    style={{ width: '100%' }}
    placeholder="select one country"
    defaultValue={['china']}
    onChange={handleChange}
    optionLabelProp="label"
  >
    <Option value="china" label="China">
      <span role="img" aria-label="China">
        🇨🇳
      </span>
      China (中国)
    </Option>
    <Option value="usa" label="USA">
      <span role="img" aria-label="USA">
        🇺🇸
      </span>
      USA (美国)
    </Option>
    <Option value="japan" label="Japan">
      <span role="img" aria-label="Japan">
        🇯🇵
      </span>
      Japan (日本)
    </Option>
    <Option value="korea" label="Korea">
      <span role="img" aria-label="Korea">
        🇰🇷
      </span>
      Korea (韩国)
    </Option>
  </Select>,
  mountNode,
);

span[role="img"] {
  margin-right: 6px;
}

分组

用 OptGroup 进行选项分组。

import { Select } from 'antd';
const { Option, OptGroup } = Select;
function handleChange(value) {
  console.log(`selected ${value}`);
}
ReactDOM.render(
  <Select defaultValue="lucy" style={{ width: 200 }} onChange={handleChange}>
    <OptGroup label="Manager">
      <Option value="jack">Jack</Option>
      <Option value="lucy">Lucy</Option>
    </OptGroup>
    <OptGroup label="Engineer">
      <Option value="Yiminghe">yiminghe</Option>
    </OptGroup>
  </Select>,
  mountNode,
);

搜索框

搜索和远程数据结合。

import { Select } from 'antd';
import jsonp from 'fetch-jsonp';
import querystring from 'querystring';
const { Option } = Select;
let timeout;
let currentValue;
function fetch(value, callback) {
  if (timeout) {
    clearTimeout(timeout);
    timeout = null;
  }
  currentValue = value;
  function fake() {
    const str = querystring.encode({
      code: 'utf-8',
      q: value,
    });
    jsonp(`https://suggest.taobao.com/sug?${str}`)
      .then(response => response.json())
      .then(d => {
        if (currentValue === value) {
          const { result } = d;
          const data = [];
          result.forEach(r => {
            data.push({
              value: r[0],
              text: r[0],
            });
          });
          callback(data);
        }
      });
  }
  timeout = setTimeout(fake, 300);
}
class SearchInput extends React.Component {
  state = {
    data: [],
    value: undefined,
  };
  handleSearch = value => {
    if (value) {
      fetch(value, data => this.setState({ data }));
    } else {
      this.setState({ data: [] });
    }
  };
  handleChange = value => {
    this.setState({ value });
  };
  render() {
    const options = this.state.data.map(d => <Option key={d.value}>{d.text}</Option>);
    return (
      <Select
        showSearch
        value={this.state.value}
        placeholder={this.props.placeholder}
        style={this.props.style}
        defaultActiveFirstOption={false}
        showArrow={false}
        filterOption={false}
        onSearch={this.handleSearch}
        onChange={this.handleChange}
        notFoundContent={null}
      >
        {options}
      </Select>
    );
  }
}
ReactDOM.render(<SearchInput placeholder="input search text" style={{ width: 200 }} />, mountNode);

自动分词

试下复制 露西,杰克 到输入框里。只在 tags 和 multiple 模式下可用。

import { Select } from 'antd';
const { Option } = Select;
const children = [];
for (let i = 10; i < 36; i++) {
  children.push(<Option key={i.toString(36) + i}>{i.toString(36) + i}</Option>);
}
function handleChange(value) {
  console.log(`selected ${value}`);
}
ReactDOM.render(
  <Select mode="tags" style={{ width: '100%' }} onChange={handleChange} tokenSeparators={[',']}>
    {children}
  </Select>,
  mountNode,
);

扩展菜单

使用 dropdownRender 对下拉菜单进行自由扩展。自定义内容点击时会关闭浮层，如果不喜欢关闭，可以添加 onMouseDown={e => e.preventDefault()} 进行阻止（更多详情见 #13448）。

import { Select, Icon, Divider } from 'antd';
const { Option } = Select;
let index = 0;
class App extends React.Component {
  state = {
    items: ['jack', 'lucy'],
  };
  addItem = () => {
    console.log('addItem');
    const { items } = this.state;
    this.setState({
      items: [...items, `New item ${index++}`],
    });
  };
  render() {
    const { items } = this.state;
    return (
      <Select
        style={{ width: 240 }}
        placeholder="custom dropdown render"
        dropdownRender={menu => (
          <div>
            {menu}
            <Divider style={{ margin: '4px 0' }} />
            <div
              style={{ padding: '4px 8px', cursor: 'pointer' }}
              onMouseDown={e => e.preventDefault()}
              onClick={this.addItem}
            >
              <Icon type="plus" /> Add item
            </div>
          </div>
        )}
      >
        {items.map(item => (
          <Option key={item}>{item}</Option>
        ))}
      </Select>
    );
  }
}
ReactDOM.render(<App />, mountNode);

带搜索框

展开后可对选项进行搜索。

import { Select } from 'antd';
const { Option } = Select;
function onChange(value) {
  console.log(`selected ${value}`);
}
function onBlur() {
  console.log('blur');
}
function onFocus() {
  console.log('focus');
}
function onSearch(val) {
  console.log('search:', val);
}
ReactDOM.render(
  <Select
    showSearch
    style={{ width: 200 }}
    placeholder="Select a person"
    optionFilterProp="children"
    onChange={onChange}
    onFocus={onFocus}
    onBlur={onBlur}
    onSearch={onSearch}
    filterOption={(input, option) =>
      option.props.children.toLowerCase().indexOf(input.toLowerCase()) >= 0
    }
  >
    <Option value="jack">Jack</Option>
    <Option value="lucy">Lucy</Option>
    <Option value="tom">Tom</Option>
  </Select>,
  mountNode,
);

三种大小

三种大小的选择框，当 size 分别为 large 和 small 时，输入框高度为 40px 和 24px ，默认高度为 32px。

import { Select, Radio } from 'antd';
const { Option } = Select;
const children = [];
for (let i = 10; i < 36; i++) {
  children.push(<Option key={i.toString(36) + i}>{i.toString(36) + i}</Option>);
}
function handleChange(value) {
  console.log(`Selected: ${value}`);
}
class SelectSizesDemo extends React.Component {
  state = {
    size: 'default',
  };
  handleSizeChange = e => {
    this.setState({ size: e.target.value });
  };
  render() {
    const { size } = this.state;
    return (
      <div>
        <Radio.Group value={size} onChange={this.handleSizeChange}>
          <Radio.Button value="large">Large</Radio.Button>
          <Radio.Button value="default">Default</Radio.Button>
          <Radio.Button value="small">Small</Radio.Button>
        </Radio.Group>
        <br />
        <br />
        <Select size={size} defaultValue="a1" onChange={handleChange} style={{ width: 200 }}>
          {children}
        </Select>
        <br />
        <Select
          mode="multiple"
          size={size}
          placeholder="Please select"
          defaultValue={['a10', 'c12']}
          onChange={handleChange}
          style={{ width: '100%' }}
        >
          {children}
        </Select>
        <br />
        <Select
          mode="tags"
          size={size}
          placeholder="Please select"
          defaultValue={['a10', 'c12']}
          onChange={handleChange}
          style={{ width: '100%' }}
        >
          {children}
        </Select>
      </div>
    );
  }
}
ReactDOM.render(<SelectSizesDemo />, mountNode);

.code-box-demo .ant-select {
  margin: 0 8px 10px 0;
}
#components-select-demo-search-box .code-box-demo .ant-select {
  margin: 0;
}

标签

tags select，随意输入的内容（scroll the menu）

import { Select } from 'antd';
const { Option } = Select;
const children = [];
for (let i = 10; i < 36; i++) {
  children.push(<Option key={i.toString(36) + i}>{i.toString(36) + i}</Option>);
}
function handleChange(value) {
  console.log(`selected ${value}`);
}
ReactDOM.render(
  <Select mode="tags" style={{ width: '100%' }} placeholder="Tags Mode" onChange={handleChange}>
    {children}
  </Select>,
  mountNode,
);

联动

省市联动是典型的例子。

推荐使用 Cascader 组件。

import { Select } from 'antd';
const { Option } = Select;
const provinceData = ['Zhejiang', 'Jiangsu'];
const cityData = {
  Zhejiang: ['Hangzhou', 'Ningbo', 'Wenzhou'],
  Jiangsu: ['Nanjing', 'Suzhou', 'Zhenjiang'],
};
class App extends React.Component {
  state = {
    cities: cityData[provinceData[0]],
    secondCity: cityData[provinceData[0]][0],
  };
  handleProvinceChange = value => {
    this.setState({
      cities: cityData[value],
      secondCity: cityData[value][0],
    });
  };
  onSecondCityChange = value => {
    this.setState({
      secondCity: value,
    });
  };
  render() {
    const { cities } = this.state;
    return (
      <div>
        <Select
          defaultValue={provinceData[0]}
          style={{ width: 120 }}
          onChange={this.handleProvinceChange}
        >
          {provinceData.map(province => (
            <Option key={province}>{province}</Option>
          ))}
        </Select>
        <Select
          style={{ width: 120 }}
          value={this.state.secondCity}
          onChange={this.onSecondCityChange}
        >
          {cities.map(city => (
            <Option key={city}>{city}</Option>
          ))}
        </Select>
      </div>
    );
  }
}
ReactDOM.render(<App />, mountNode);

获得选项的文本

默认情况下 onChange 里只能拿到 value，如果需要拿到选中的节点文本 label，可以使用 labelInValue 属性。

选中项的 label 会被包装到 value 中传递给 onChange 等函数，此时 value 是一个对象。

import { Select } from 'antd';
const { Option } = Select;
function handleChange(value) {
  console.log(value); // { key: "lucy", label: "Lucy (101)" }
}
ReactDOM.render(
  <Select
    labelInValue
    defaultValue={{ key: 'lucy' }}
    style={{ width: 120 }}
    onChange={handleChange}
  >
    <Option value="jack">Jack (100)</Option>
    <Option value="lucy">Lucy (101)</Option>
  </Select>,
  mountNode,
);

搜索用户

一个带有远程搜索，防抖控制，请求时序控制，加载状态的多选示例。

import { Select, Spin } from 'antd';
import debounce from 'lodash/debounce';
const { Option } = Select;
class UserRemoteSelect extends React.Component {
  constructor(props) {
    super(props);
    this.lastFetchId = 0;
    this.fetchUser = debounce(this.fetchUser, 800);
  }
  state = {
    data: [],
    value: [],
    fetching: false,
  };
  fetchUser = value => {
    console.log('fetching user', value);
    this.lastFetchId += 1;
    const fetchId = this.lastFetchId;
    this.setState({ data: [], fetching: true });
    fetch('https://randomuser.me/api/?results=5')
      .then(response => response.json())
      .then(body => {
        if (fetchId !== this.lastFetchId) {
          // for fetch callback order
          return;
        }
        const data = body.results.map(user => ({
          text: `${user.name.first} ${user.name.last}`,
          value: user.login.username,
        }));
        this.setState({ data, fetching: false });
      });
  };
  handleChange = value => {
    this.setState({
      value,
      data: [],
      fetching: false,
    });
  };
  render() {
    const { fetching, data, value } = this.state;
    return (
      <Select
        mode="multiple"
        labelInValue
        value={value}
        placeholder="Select users"
        notFoundContent={fetching ? <Spin size="small" /> : null}
        filterOption={false}
        onSearch={this.fetchUser}
        onChange={this.handleChange}
        style={{ width: '100%' }}
      >
        {data.map(d => (
          <Option key={d.value}>{d.text}</Option>
        ))}
      </Select>
    );
  }
}
ReactDOM.render(<UserRemoteSelect />, mountNode);

隐藏已选择选项

隐藏下拉列表中已选择的选项。

import { Select } from 'antd';
const OPTIONS = ['Apples', 'Nails', 'Bananas', 'Helicopters'];
class SelectWithHiddenSelectedOptions extends React.Component {
  state = {
    selectedItems: [],
  };
  handleChange = selectedItems => {
    this.setState({ selectedItems });
  };
  render() {
    const { selectedItems } = this.state;
    const filteredOptions = OPTIONS.filter(o => !selectedItems.includes(o));
    return (
      <Select
        mode="multiple"
        placeholder="Inserted are removed"
        value={selectedItems}
        onChange={this.handleChange}
        style={{ width: '100%' }}
      >
        {filteredOptions.map(item => (
          <Select.Option key={item} value={item}>
            {item}
          </Select.Option>
        ))}
      </Select>
    );
  }
}
ReactDOM.render(<SelectWithHiddenSelectedOptions />, mountNode);

API

<Select>
  <Select.Option value="lucy">lucy</Select.Option>
</Select>

Select props

注意，如果发现下拉菜单跟随页面滚动，或者需要在其他弹层中触发 Select，请尝试使用 getPopupContainer={triggerNode => triggerNode.parentElement} 将下拉弹层渲染节点固定在触发器的父元素中。

Select Methods

Option props

OptGroup props

FAQ

点击 dropdownRender 里的内容浮层关闭怎么办？

看下 dropdownRender 例子 里的说明。