以注入参数 ​​brole​​​为例，默认值为​​'0'​​

// src/router/index.js
const routes = [
  ...
];

const router = new VueRouter({
  routes
});

router.beforeEach((to, from, next) => {
  if (to.query.brole) {
    next();
  } else {
    next({
      path: to.path,
      query: { brole: from.query.brole || '0', ...to.query }
    });
  }
});
export default router;