在Angular7中切换映射之前的条件和赋值

import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from '@angular/router';

@Injectable()
export class MyGuard implements CanActivate {
  constructor(private router: Router) {}

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean {
    // 在这里进行切换映射之前的条件判断
    if (条件判断) {
      // 条件满足，进行赋值操作
      赋值操作
      return true;
    } else {
      // 条件不满足，取消导航并跳转到其他页面
      this.router.navigate(['/other-page']);
      return false;
    }
  }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { MyGuard } from './my-guard';

const routes: Routes = [
  {
    path: 'my-page',
    canActivate: [MyGuard],
    // 其他配置...
  },
  // 其他路由配置...
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }