Input输入框

通过鼠标或键盘输入内容，是最基础的表单域的包装。

何时使用

• 需要用户输入表单域内容时。

• 提供组合型输入框，带搜索的输入框，还可以进行大小选择。

代码演示

基本使用

基本使用。

import { Input } from 'antd';
ReactDOM.render(<Input placeholder="Basic usage" />, mountNode);

前置/后置标签

用于配置一些固定组合。

import { Input, Select } from 'antd';
import { SettingOutlined } from '@ant-design/icons';
const { Option } = Select;
const selectBefore = (
  <Select defaultValue="http://" className="select-before">
    <Option value="http://">http://</Option>
    <Option value="https://">https://</Option>
  </Select>
);
const selectAfter = (
  <Select defaultValue=".com" className="select-after">
    <Option value=".com">.com</Option>
    <Option value=".jp">.jp</Option>
    <Option value=".cn">.cn</Option>
    <Option value=".org">.org</Option>
  </Select>
);
ReactDOM.render(
  <>
    <div style={{ marginBottom: 16 }}>
      <Input addonBefore="http://" addonAfter=".com" defaultValue="mysite" />
    </div>
    <div style={{ marginBottom: 16 }}>
      <Input addonBefore={selectBefore} addonAfter={selectAfter} defaultValue="mysite" />
    </div>
    <div style={{ marginBottom: 16 }}>
      <Input addonAfter={<SettingOutlined />} defaultValue="mysite" />
    </div>
    <div style={{ marginBottom: 16 }}>
      <Input addonBefore="http://" suffix=".com" defaultValue="mysite" />
    </div>
  </>,
  mountNode,
);

.select-before {
  width: 90px;
}
.select-after {
  width: 80px;
}
[data-theme='compact'] .select-before {
  width: 71px;
}
[data-theme='compact'] .select-after {
  width: 65px;
}

搜索框

带有搜索按钮的输入框。

import { Input } from 'antd';
import { AudioOutlined } from '@ant-design/icons';
const { Search } = Input;
const suffix = (
  <AudioOutlined
    style={{
      fontSize: 16,
      color: '#1890ff',
    }}
  />
);
ReactDOM.render(
  <>
    <Search
      placeholder="input search text"
      onSearch={value => console.log(value)}
      style={{ width: 200 }}
    />
    <br />
    <br />
    <Search placeholder="input search text" onSearch={value => console.log(value)} enterButton />
    <br />
    <br />
    <Search
      placeholder="input search text"
      enterButton="Search"
      size="large"
      onSearch={value => console.log(value)}
    />
    <br />
    <br />
    <Search
      placeholder="input search text"
      enterButton="Search"
      size="large"
      suffix={suffix}
      onSearch={value => console.log(value)}
    />
  </>,
  mountNode,
);

文本域

用于多行输入。

import { Input } from 'antd';
const { TextArea } = Input;
ReactDOM.render(<TextArea rows={4} />, mountNode);

输入时格式化展示

结合 Tooltip 组件，实现一个数值输入框，方便内容超长时的全量展现。

import { Input, Tooltip } from 'antd';
function formatNumber(value) {
  value += '';
  const list = value.split('.');
  const prefix = list[0].charAt(0) === '-' ? '-' : '';
  let num = prefix ? list[0].slice(1) : list[0];
  let result = '';
  while (num.length > 3) {
    result = `,${num.slice(-3)}${result}`;
    num = num.slice(0, num.length - 3);
  }
  if (num) {
    result = num + result;
  }
  return `${prefix}${result}${list[1] ? `.${list[1]}` : ''}`;
}
class NumericInput extends React.Component {
  onChange = e => {
    const { value } = e.target;
    const reg = /^-?\d*(\.\d*)?$/;
    if ((!isNaN(value) && reg.test(value)) || value === '' || value === '-') {
      this.props.onChange(value);
    }
  };
  // '.' at the end or only '-' in the input box.
  onBlur = () => {
    const { value, onBlur, onChange } = this.props;
    let valueTemp = value;
    if (value.charAt(value.length - 1) === '.' || value === '-') {
      valueTemp = value.slice(0, -1);
    }
    onChange(valueTemp.replace(/0*(\d+)/, '$1'));
    if (onBlur) {
      onBlur();
    }
  };
  render() {
    const { value } = this.props;
    const title = value ? (
      <span className="numeric-input-title">{value !== '-' ? formatNumber(value) : '-'}</span>
    ) : (
      'Input a number'
    );
    return (
      <Tooltip
        trigger={['focus']}
        title={title}
        placement="topLeft"
        overlayClassName="numeric-input"
      >
        <Input
          {...this.props}
          onChange={this.onChange}
          onBlur={this.onBlur}
          placeholder="Input a number"
          maxLength={25}
        />
      </Tooltip>
    );
  }
}
class NumericInputDemo extends React.Component {
  constructor(props) {
    super(props);
    this.state = { value: '' };
  }
  onChange = value => {
    this.setState({ value });
  };
  render() {
    return (
      <NumericInput style={{ width: 120 }} value={this.state.value} onChange={this.onChange} />
    );
  }
}
ReactDOM.render(<NumericInputDemo />, mountNode);

/* to prevent the arrow overflow the popup container,
or the height is not enough when content is empty */
.numeric-input .ant-tooltip-inner {
  min-width: 32px;
  min-height: 37px;
}
.numeric-input .numeric-input-title {
  font-size: 14px;
}

密码框

密码框。

import { Input, Space } from 'antd';
import { EyeInvisibleOutlined, EyeTwoTone } from '@ant-design/icons';
ReactDOM.render(
  <Space direction="vertical">
    <Input.Password placeholder="input password" />
    <Input.Password
      placeholder="input password"
      iconRender={visible => (visible ? <EyeTwoTone /> : <EyeInvisibleOutlined />)}
    />
  </Space>,
  mountNode,
);

三种大小

我们为 <Input /> 输入框定义了三种尺寸（大、默认、小），高度分别为 40px、32px 和 24px。

import { Input } from 'antd';
import { UserOutlined } from '@ant-design/icons';
ReactDOM.render(
  <>
    <Input size="large" placeholder="large size" prefix={<UserOutlined />} />
    <br />
    <br />
    <Input placeholder="default size" prefix={<UserOutlined />} />
    <br />
    <br />
    <Input size="small" placeholder="small size" prefix={<UserOutlined />} />
  </>,
  mountNode,
);

输入框组合

输入框的组合展现。

注意：使用 compact 模式时，不需要通过 Col 来控制宽度。

import { Input, Col, Row, Select, InputNumber, DatePicker, AutoComplete, Cascader } from 'antd';
const { Option } = Select;
const options = [
  {
    value: 'zhejiang',
    label: 'Zhejiang',
    children: [
      {
        value: 'hangzhou',
        label: 'Hangzhou',
        children: [
          {
            value: 'xihu',
            label: 'West Lake',
          },
        ],
      },
    ],
  },
  {
    value: 'jiangsu',
    label: 'Jiangsu',
    children: [
      {
        value: 'nanjing',
        label: 'Nanjing',
        children: [
          {
            value: 'zhonghuamen',
            label: 'Zhong Hua Men',
          },
        ],
      },
    ],
  },
];
const App = () => (
  <div className="site-input-group-wrapper">
    <Input.Group size="large">
      <Row gutter={8}>
        <Col span={5}>
          <Input defaultValue="0571" />
        </Col>
        <Col span={8}>
          <Input defaultValue="26888888" />
        </Col>
      </Row>
    </Input.Group>
    <br />
    <Input.Group compact>
      <Input style={{ width: '20%' }} defaultValue="0571" />
      <Input style={{ width: '30%' }} defaultValue="26888888" />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Select defaultValue="Zhejiang">
        <Option value="Zhejiang">Zhejiang</Option>
        <Option value="Jiangsu">Jiangsu</Option>
      </Select>
      <Input style={{ width: '50%' }} defaultValue="Xihu District, Hangzhou" />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Input style={{ width: '20%' }} defaultValue="0571" />
      <Input.Search style={{ width: '30%' }} defaultValue="26888888" />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Select defaultValue="Option1">
        <Option value="Option1">Option1</Option>
        <Option value="Option2">Option2</Option>
      </Select>
      <Input style={{ width: '50%' }} defaultValue="input content" />
      <InputNumber />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Input style={{ width: '50%' }} defaultValue="input content" />
      <DatePicker style={{ width: '50%' }} />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Input style={{ width: '30%' }} defaultValue="input content" />
      <DatePicker.RangePicker style={{ width: '70%' }} />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Select defaultValue="Option1-1">
        <Option value="Option1-1">Option1-1</Option>
        <Option value="Option1-2">Option1-2</Option>
      </Select>
      <Select defaultValue="Option2-2">
        <Option value="Option2-1">Option2-1</Option>
        <Option value="Option2-2">Option2-2</Option>
      </Select>
    </Input.Group>
    <br />
    <Input.Group compact>
      <Select defaultValue="1">
        <Option value="1">Between</Option>
        <Option value="2">Except</Option>
      </Select>
      <Input style={{ width: 100, textAlign: 'center' }} placeholder="Minimum" />
      <Input
        className="site-input-split"
        style={{
          width: 30,
          borderLeft: 0,
          borderRight: 0,
          pointerEvents: 'none',
        }}
        placeholder="~"
        disabled
      />
      <Input
        className="site-input-right"
        style={{
          width: 100,
          textAlign: 'center',
        }}
        placeholder="Maximum"
      />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Select defaultValue="Sign Up" style={{ width: '30%' }}>
        <Option value="Sign Up">Sign Up</Option>
        <Option value="Sign In">Sign In</Option>
      </Select>
      <AutoComplete
        style={{ width: '70%' }}
        placeholder="Email"
        options={[{ value: 'text 1' }, { value: 'text 2' }]}
      />
    </Input.Group>
    <br />
    <Input.Group compact>
      <Select style={{ width: '30%' }} defaultValue="Home">
        <Option value="Home">Home</Option>
        <Option value="Company">Company</Option>
      </Select>
      <Cascader style={{ width: '70%' }} options={options} placeholder="Select Address" />
    </Input.Group>
  </div>
);
ReactDOM.render(<App />, mountNode);

.site-input-group-wrapper .site-input-split {
  background-color: #fff;
}
.site-input-group-wrapper .site-input-right {
  border-left-width: 0;
}
.site-input-group-wrapper .site-input-right:hover,
.site-input-group-wrapper .site-input-right:focus {
  border-left-width: 1px;
}
.site-input-group-wrapper .ant-input-rtl.site-input-right {
  border-right-width: 0;
}
.site-input-group-wrapper .ant-input-rtl.site-input-right:hover,
.site-input-group-wrapper .ant-input-rtl.site-input-right:focus {
  border-right-width: 1px;
}

搜索框 loading

用于 onSearch 的时候展示 loading。

import { Input } from 'antd';
const { Search } = Input;
ReactDOM.render(
  <>
    <Search placeholder="input search loading deault" loading />
    <br />
    <br />
    <Search placeholder="input search loading with enterButton" loading enterButton />
  </>,
  mountNode,
);

适应文本高度的文本域

autoSize 属性适用于 textarea 节点，并且只有高度会自动变化。另外 autoSize 可以设定为一个对象，指定最小行数和最大行数。

import { Input } from 'antd';
const { TextArea } = Input;
class Demo extends React.Component {
  state = {
    value: '',
  };
  onChange = ({ target: { value } }) => {
    this.setState({ value });
  };
  render() {
    const { value } = this.state;
    return (
      <>
        <TextArea placeholder="Autosize height based on content lines" autoSize />
        <div style={{ margin: '24px 0' }} />
        <TextArea
          placeholder="Autosize height with minimum and maximum number of lines"
          autoSize={{ minRows: 2, maxRows: 6 }}
        />
        <div style={{ margin: '24px 0' }} />
        <TextArea
          value={value}
          onChange={this.onChange}
          placeholder="Controlled autosize"
          autoSize={{ minRows: 3, maxRows: 5 }}
        />
      </>
    );
  }
}
ReactDOM.render(<Demo />, mountNode);

前缀和后缀

在输入框上添加前缀或后缀图标。

import { Input, Tooltip } from 'antd';
import { InfoCircleOutlined, UserOutlined } from '@ant-design/icons';
ReactDOM.render(
  <>
    <Input
      placeholder="Enter your username"
      prefix={<UserOutlined className="site-form-item-icon" />}
      suffix={
        <Tooltip title="Extra information">
          <InfoCircleOutlined style={{ color: 'rgba(0,0,0,.45)' }} />
        </Tooltip>
      }
    />
    <br />
    <br />
    <Input prefix="￥" suffix="RMB" />
    <br />
    <br />
    <Input prefix="￥" suffix="RMB" disabled />
  </>,
  mountNode,
);

带移除图标

带移除图标的输入框，点击图标删除所有内容。

import { Input } from 'antd';
const { TextArea } = Input;
const onChange = e => {
  console.log(e);
};
ReactDOM.render(
  <>
    <Input placeholder="input with clear icon" allowClear onChange={onChange} />
    <br />
    <br />
    <TextArea placeholder="textarea with clear icon" allowClear onChange={onChange} />
  </>,
  mountNode,
);

API

Input

如果 Input 在 Form.Item 内，并且 Form.Item 设置了 id 和 options 属性，则 value defaultValue 和 id 属性会被自动设置。

Input 的其他属性和 React 自带的 input 一致。

Input.TextArea

Input.TextArea 的其他属性和浏览器自带的 textarea 一致。

Input.Search

其余属性和 Input 一致。

Input.Group

<Input.Group>
  <input />
  <input />
</Input.Group>

Input.Password

FAQ

为什么我动态改变 prefix/suffix 时，Input 会失去焦点？

当 Input 动态添加或者删除 prefix/suffix 时，React 会重新创建 DOM 结构而新的 input 是没有焦点的。你可以预设一个空的 <span /> 来保持 DOM 结构不变：

const suffix = condition ? <Icon type="smile" /> : <span />;
<Input suffix={suffix} />;