---
order: 7
title:
zh-CN: 输入时格式化展示
en-US: Format Tooltip Input
---
## zh-CN
结合 [Tooltip](/components/tooltip) 组件,实现一个数值输入框,方便内容超长时的全量展现。
## en-US
You can use the Input in conjunction with [Tooltip](/components/tooltip) component to create a Numeric Input, which can provide a good experience for extra-long content display.
````jsx
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 = /^-?(0|[1-9][0-9]*)(\.[0-9]*)?$/;
if ((!Number.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;
if (value.charAt(value.length - 1) === '.' || value === '-') {
onChange(value.slice(0, -1));
}
if (onBlur) {
onBlur();
}
}
render() {
const { value } = this.props;
const title = value ? (
{value !== '-' ? formatNumber(value) : '-'}
) : 'Input a number';
return (
);
}
}
class NumericInputDemo extends React.Component {
constructor(props) {
super(props);
this.state = { value: '' };
}
onChange = (value) => {
this.setState({ value });
}
render() {
return ;
}
}
ReactDOM.render(, mountNode);
````
````css
/* 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;
}
````