Edge-host-maintenance/src/app/app.component.ts

import { Component } from '@angular/core';
import { CacheTokenService } from './service/cache-token.service';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {
  constructor(public token: CacheTokenService) { }
  ngOnInit() {
    if (sessionStorage.getItem('token') && !this.token.timer) {
      //调用服务中的function刷新token
      this.token.startUp()  
    }
  }
}