导航栏跳转页面[通俗易懂]

大家好，又见面了，我是你们的朋友全栈君。

一个页面有多个导航栏跳转页面一定要有这三步

html 结构部分
<el-menu
:default-active="path"
class="el-menu-vertical-demo"
:unique-opened="true"
@select="listChange"
>
<el-menu-item index="/index/aiIdentify/achievementWall">
<i class="el-icon-document"></i>
<span slot="title">成果墙</span>
</el-menu-item>
<el-menu-item index="/index/aiIdentify/onlineAIRecognition">
<i class="el-icon-document"></i>
<span slot="title">在线AI识别</span>
</el-menu-item>
<el-menu-item index="/index/aiIdentify/identifyRecord">
<i class="el-icon-document"></i>
<span slot="title">识别记录</span>
</el-menu-item>
<el-menu-item index="/index/aiIdentify/resultsRecord">
<i class="el-icon-document"></i>
<span slot="title">成果记录</span>
</el-menu-item>
</el-menu>
data() { 

return { 

path: '/index/aiIdentify/achievementWall',
}
}, 
created() { 

this.path = this.$route.path
},
watch: { 

$route(e) { 

this.path = e.path
},
},
methods: { 

listChange(index, indexPath) { 

this.path = index
if (this.$route.path !== this.path) { 

this.$router.push(this.path)
}
},  
}