ant-design/components/input-number/demo/digit.md

order	title
3	[{zh-CN 小数} {en-US Decimals}]

zh-CN

和原生的数字输入框一样，value 的精度由 step 的小数位数决定。

en-US

A numeric-only input box whose values can be increased or decreased using a decimal step. The number of decimals (also known as precision) is determined by the step prop.

import { InputNumber } from 'antd';

function onChange(value) {
  console.log('changed', value);
}

ReactDOM.render(
  <InputNumber min={0} max={10} step={0.1} onChange={onChange} />
, mountNode);