datang-admin/src/App.vue

<template>
  <div id="app">
    <router-view />
  </div>
</template>

<script>
import router from '@/router/index'
export default {
  name: 'App',

  watch: {
    $route(to){
      const path = `/${to.path.split('/')[1]}`
      this.setCode(path)
    }
  },

   methods: {
     setCode(path) {
       router.options.routes.forEach(first => {
           if(first && first.path && first.path === path){
             localStorage.setItem('code', first.code)
             return;
           }else{
             if(first.children && first.children.length){
               first.children.forEach(second => {
                  if(second && second.path && second.path === path){
                    localStorage.setItem('code', second.code)
                    return;
                  }else{
                    if(second.children && second.children.length){
                      second.children.forEach(third => {
                        if(third && third.path && third.path === path){
                          localStorage.setItem('code', third.code)
                          return;
                        }
                      })
                    }
                  }
               })
             }
           }
        })
     }
   }
}
</script>

<style>
#table-content table th{
  padding: 0 10px!important;
  background-color: #f1f1f1;
}
#table-content table td{
  padding: 0 10px!important;
}
</style>