官方文档给的代码中，el-container无法占满高度

解决方法：

.el-container {
  height: 100%;
}

效果

完整代码

<template>
  <div id="user-manage">
    <el-container>
      <el-header>Header</el-header>
      <el-container>
        <el-aside width="200px">Aside</el-aside>
        <el-main>Main</el-main>
      </el-container>
      <el-footer>Footer</el-footer>
    </el-container>

  </div>
</template>

<script>
export default {
  name: "UserManageShow"
}
</script>

<style lang="scss" scoped>
@import "./../../style/universal";

#user-manage {
  height: $occupy-all;
  width: $occupy-all;
  background-color: green;

  .el-container {
    height: 100%;
  }

  .el-header, .el-footer {
    background-color: #B3C0D1;
    color: #333;
    text-align: center;
    height: 60px !important;
  }

  .el-aside {
    background-color: #D3DCE6;
    color: #333;
    text-align: center;
    line-height: 200px;
  }

  .el-main {
    background-color: #9ea4aa;
  }
}

</style>