父级元素 nav 无法自适应子元素宽高在nav元素中嵌套一个导航组件，导致nav元素的宽高无法自适应。如图：尝试使用了一些清除浮动流的写法全部没有办法重新使nav获取子元素的宽高。没有使父元素自适应子元素的宽高// 父组件import BaseNav from './BaseNav';export default function LayoutMain() { return ( <BrowserRouter> <nav className={styles['nav']} > <BaseNav /> </nav> </BrowserRouter> )}// 导航组件export default function BaseNav() { console.log( Router, '' ); return ( <Menu mode="horizontal" className={styles['nav__menu']}> <Menu.Item key="mail"> Navigation One </Menu.Item> <Menu.Item key="app" disabled> Navigation Two </Menu.Item> </Menu> )}// 样式.nav{ position: relative; background-color: #bf5555; border: 1px solid;}.nav::before { content: ""; content: ""; display: inline-block; height: 0; clear: both; visibility: hidden;}.nav__menu { position: absolute;}.nav__menu::before{ content: ""; display: inline-block; height: 0; clear: both; visibility: hidden;}