欢迎关于element-ui,iview等侧边栏高度不能全部占满浏览器高度问题使用CSDN-markdown编辑器

需要CSS配置：

.el-aside {
  display: block;
  position: absolute;
  left: 0;
  top: 70px;
  bottom: 0;
  overflow-y: scroll;
}

全部代码如下：

Layout.vue

<template id="layout">
  <div>
    <el-container>
      <el-header>Header</el-header>
      <el-container>
        <el-aside width="200px">
          <AsideBar />
        </el-aside>
        <el-main>Main</el-main>
      </el-container>
    </el-container>
  </div>
</template>


<style>
.el-container {
  height: 100%;
}
.el-header {
  background-color: #b3c0d1;
  color: #333;
  line-height: 60px;
}
.el-aside {
  display: block;
  position: absolute;
  left: 0;
  top: 70px;
  bottom: 0;
  overflow-y: scroll;
}
</style>

<script>
import AsideBar from './AsideBar';
export default {
  components: { AsideBar },
};
</script>

Aside.vue

<template id='asidebar'>
  <div>
    <el-radio-group v-model="isCollapse" style="margin-bottom: 20px;">
      <el-radio-button :label="false">展开</el-radio-button>
      <el-radio-button :label="true">收起</el-radio-button>
    </el-radio-group>
    <el-menu
      default-active="1-4-1"
      class="el-menu-vertical-demo"
      @open="handleOpen"
      @close="handleClose"
      :collapse="isCollapse"
    >
      <el-submenu index="1">
        <template slot="title">
          <i class="el-icon-location"></i>
          <span slot="title">导航一</span>
        </template>
        <el-menu-item-group>
          <span slot="title">分组一</span>
          <el-menu-item index="1-1">选项1</el-menu-item>
          <el-menu-item index="1-2">选项2</el-menu-item>
        </el-menu-item-group>
        <el-menu-item-group title="分组2">
          <el-menu-item index="1-3">选项3</el-menu-item>
        </el-menu-item-group>
        <el-submenu index="1-4">
          <span slot="title">选项4</span>
          <el-menu-item index="1-4-1">选项1</el-menu-item>
        </el-submenu>
      </el-submenu>
      <el-menu-item index="2">
        <i class="el-icon-menu"></i>
        <span slot="title">导航二</span>
      </el-menu-item>
      <el-menu-item index="3" disabled>
        <i class="el-icon-document"></i>
        <span slot="title">导航三</span>
      </el-menu-item>
      <el-menu-item index="4">
        <i class="el-icon-setting"></i>
        <span slot="title">导航四</span>
      </el-menu-item>
    </el-menu>
  </div>
</template>

<script>
export default {
  data () {
    return {
      isCollapse: true
    };
  },
  methods: {
    handleOpen (key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose (key, keyPath) {
      console.log(key, keyPath);
    }
  }
}
</script>

<style>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  height: auto;
}
</style>