expand collapse -Go服务器开发

将您提供的 Vue 3 + TypeScript 的代码改写成 JavaScript 代码，具体如下：

<template>
  <el-radio-group v-model="isCollapse" style="margin-bottom: 20px">
    <el-radio-button :value="false">expand</el-radio-button>
    <el-radio-button :value="true">collapse</el-radio-button>
  </el-radio-group>
  <el-menu
    default-active="2"
    class="el-menu-vertical-demo"
    :collapse="isCollapse"
    @open="handleOpen"
    @close="handleClose"
  >
    <el-sub-menu index="1">
      <template #title>
        <el-icon><location /></el-icon>
        <span>Navigator One</span>
      </template>
      <el-menu-item-group>
        <template #title><span>Group One</span></template>
        <el-menu-item index="1-1">item one</el-menu-item>
        <el-menu-item index="1-2">item two</el-menu-item>
      </el-menu-item-group>
      <el-menu-item-group title="Group Two">
        <el-menu-item index="1-3">item three</el-menu-item>
      </el-menu-item-group>
      <el-sub-menu index="1-4">
        <template #title><span>item four</span></template>
        <el-menu-item index="1-4-1">item one</el-menu-item>
      </el-sub-menu>
    </el-sub-menu>
    <el-menu-item index="2">
      <el-icon><icon-menu /></el-icon>
      <template #title>Navigator Two</template>
    </el-menu-item>
    < el - menu - item index = "3" disabled >
     <
     el - icon > <
     document / > <
     / el - icon >
     <
     template #title > Navigator Three <
     / template >
     <
     / el - menu - item >
     <
     el - menu - item index = "4" >
     <
     el - icon > <
     setting / > <
     / el - icon >
       <
       template #title > Navigator Four <
       / template >
       <
       / el - menu - item >
       </ el - menu >
       </ template >

<script lang="js">
import { ref } from 'vue';
import {
  Document,
  Menu as IconMenu,
  Location,
  Setting,
} from '@element-plus/icons-vue';

export default {
  setup() {
    const isCollapse = ref(true);
    
    const handleOpen = (key, keyPath) => {
      console.log(key, keyPath);
    };
    
    const handleClose = (key, keyPath) => {
      console.log(key, keyPath);
    };

    return {
      isCollapse,
      handleOpen,
      handleClose
    };
  }
};
</script>

<style scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
</style>

在这个改写的版本中，<script> 标签中的 lang 属性被移除，并且使用了普通的 JavaScript（而不是 TypeScript）。同时也去掉了类型声明，使得其符合 JavaScript 的语法规范。

内容由零声教学AI助手提供，问题来源于学员提问