Sinopec-Anxin/src/app/pages/home/home.component.ts

import { Component, OnInit } from '@angular/core';
import { Router, NavigationEnd, ActivatedRoute } from '@angular/router';
import { Title } from '@angular/platform-browser'
import { filter } from 'rxjs/operators';
@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.scss']
})
export class HomeComponent implements OnInit {

  constructor(private router: Router) { }
  isGasStationNav: boolean
  isGasStation: boolean
  isWarning: boolean = false//是否是今日预警页面
  ngOnInit(): void {

    if(sessionStorage.getItem('isGasStation') == 'true'){
      this.isGasStationNav = true
    }else{
      this.isGasStationNav = false
    }

    this.router.events.pipe(
      filter(event => event instanceof NavigationEnd)
    ).subscribe((event: any) => {
      if (event.url.indexOf('warning') != -1) {//控制今日预警左上角数字显示
        this.isWarning = true
      } else {
        this.isWarning = false
      }
      if (event.url.indexOf('petrolStation') != -1 && sessionStorage.getItem('isGasStation') == 'false') {//控制返回按钮显示
        this.isGasStation = true
      }else{
        this.isGasStation = false
      }
    });
  }


  goback(){
    history.go(-1)
  }

}