//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()

});