border-top-left-radius border-top-right-radius border-bottom-left-radius border-bottom-right-radius

参考下，可以满足你的问题 https://segmentfault.com/q/10...

CSS求教这种效果如何实现

发布于
2020-09-17

shot

<template>
 <div>
 <ul class="ul-wrapper">
 <li
 @click="(is_active = n)&(top = (n-1) * 48 + 'px')"
 class="li-wrapper"
 v-for="n in 8" :key="n"
 >
 <span :class="{'li-active':n===is_active}" class="li-span">xxxxxxx{{n}}</span>
 </li>
 <li class="li-mask" :style="{top}" />
 </ul>
 </div>
</template>
<script>
 export default {
 name: "test",
 data() {
 return {
 is_active: 1,
 top: 0
 }
 } }</script>
<style scoped>
 .ul-wrapper {
 list-style: none;
 margin: 0;
 padding: 0;
 position: relative;
 width: max-content;
 overflow: hidden;
 }
 .li-wrapper {
 width: 200px;
 position: relative;
 display: flex;
 justify-content: center;
 align-items: center;
 height: 48px;
 list-style: none;
 color: #FFFFFF;
 box-sizing: border-box;
 background: #7436E6;
 text-decoration: none;
 cursor: pointer;
 } .li-span{
 position: relative;
 z-index: 2;
 transition: all .5s .25s ease-in-out; /* 延时动画 */ }
 .li-active {
 color: #7436E6 !important;
 }
 .li-mask {
 position: absolute;
 z-index: 1;
 margin-left: 10%;
 width: 90%;
 height: 48px;
 transition: all .5s ease-in-out;
 border-top-left-radius: 20px;
 border-bottom-left-radius: 20px;
 background: #FFFFFF;
 } .li-mask::before{
 content:'';
 position:absolute;
 height:1em;
 width:1em;
 right:0;
 top:-1em;
 border-bottom-right-radius:1em;
 box-shadow:1em 1em 0 1em #FFF;
 } .li-mask::after{
 content:'';
 position:absolute;
 height:1em;
 width:1em;
 right:0;
 bottom:-1em;
 border-top-right-radius:1em;
 box-shadow:1em -1em 0 1em #FFF;
 }</style>

Fractal

5.5k22331

发布于
2020-09-17

更新于
2020-09-17

<!DOCTYPE html>
<html>
<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <style>
 .menu-list {padding-left:1em;width:200px;color:#FFF;background-color:#369;}
 .menu-list .menu {position:relative;line-height:2em;text-align:center;}
 .menu-list .menu.active {color:#369;border-top-left-radius:1em;border-bottom-left-radius:1em;background-color:#FFF;}
 .menu-list .menu.active:before {content:'\\200B';position:absolute;height:1em;width:1em;right:0;top:-1em;border-bottom-right-radius:1em;box-shadow:1em 1em 0 1em #FFF;}
 .menu-list .menu.active:after {content:'\\200B';position:absolute;height:1em;width:1em;right:0;bottom:-1em;border-top-right-radius:1em;box-shadow:1em -1em 0 1em #FFF;}
 </style>
</head>
<body>
<div class="menu-list">
 <div class="menu">应用</div>
 <div class="menu">订单</div>
 <div class="menu">设置</div>
 <div class="menu active">官网</div>
 <div class="menu">关于我们</div>
</div>
</body>
</html>

learning

2.6k1317

发布于
2020-09-17

https://codepen.io/learningcn/pen/MWyqJYe

图片.png

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title></title>
  <style type="text/css">
    * { padding: 0; margin: 0; border: 0; font-family: Helvetica, sans-serif; }
    aside { background: #5993FD; width: 200px; height: 100vh; }
    ul { padding-left: 10px; }
    li { list-style: none; position: relative; color: #fff; height: 60px; line-height: 60px; font-size: 24px; box-sizing: border-box; padding: 0 0 0 30px; }
    li.active { background: #fff; color: #5993FD; border-radius: 30px 0 0 30px; }
    li.active:before,
    li.active:after { content: ""; background: #5993FD; width: 30px; height: 30px; position: absolute; right: 0;  }
    li.active:before { top: -30px; border-radius: 0 0 30px 0; box-shadow: 15px 15px 0 15px #fff; }
    li.active:after { bottom: -30px; border-radius: 0 30px 0 0; box-shadow: 15px -15px 0 15px #fff; }
  </style>
</head>
<body>
  <aside>
    <nav>
      <ul>
        <li>First</li>
        <li>Second</li>
        <li>Third</li>
        <li>Fouth</li>
        <li class="active">Fifth</li>
      </ul>
    </nav>
  </aside>
</body>
</html>