//router内的设置
{
      path: '/teachers',
      name: 'TDetail',
      component: TDetail,
      meta: {
        title:"教师详情",
        content: 'disable'
      }
    },
    {
      path: '/article',
      name: 'Article',
      component: Article,
      meta: {
        title: "文章详情",
        content: 'disable-no'
      }
    },
  //main.js里面的代码
  router.beforeEach((to, from, next) => {
  /* 路由发生变化修改页面meta */
  if(to.meta.content){
    let head = document.getElementsByTagName('head');
    let meta = document.createElement('meta');
    meta.content = to.meta.content;
    head[0].appendChild(meta)
  }
  /* 路由发生变化修改页面title */
  if (to.meta.title) {
    document.title = to.meta.title;
  }
  next()
});