router.js

{
    path: "/our",
    name: "our",
    component: () =>
      import("../views/our.vue"),
    meta: {    //加一个meta
      title: '个人中心',
    }
  },

main.js 配前置路由

router.beforeEach((to, from, next) => {
  /* 路由发生变化修改页面title */
  if (to.meta.title) {
      document.title = to.meta.title
  } else {
      document.title = ''
  }
  next()
});