//router內的設置{   path: '/teachers',   name: 'TDetail',   component: TDetail,   meta: {    title:"教師詳情",    content: 'disable'   }  },  {   path: '/article',   name: 'Article',   component: Article,   meta: {    title: "文章詳情",    content: 'disable-no'   }  }, //main.js里面的代碼 router.beforeEach((to, from, next) => { /* 路由發生變化修改頁面meta */ if(to.meta.content){  let head = document.getElementsByTagName('head');  let meta = document.createElement('meta');  meta.content = to.meta.content;  head[0].appendChild(meta) } /* 路由發生變化修改頁面title */ if (to.meta.title) {  document.title = to.meta.title; } next()});