vue中动态设置meta标签和title标签的方法

//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()
});