另一个解决方案

window.history.back ();

在Angular 2的最终版本中。X / 4。x -这里是文档https://angular.io/api/common/Location

/* typescript */

import { Location } from '@angular/common';
// import stuff here

@Component({
// declare component here
})
export class MyComponent {

  // inject location into component constructor
  constructor(private location: Location) { }

  cancel() {
    this.location.back(); // <-- go back to previous location on cancel
  }
}

在这些精彩的答案之后，我希望我的答案能找到一些人，并帮助他们。我编写了一个小服务来跟踪路线历史。开始了。

import { Injectable } from '@angular/core';
import { NavigationEnd, Router } from '@angular/router';
import { filter } from 'rxjs/operators';

@Injectable()
export class RouteInterceptorService {
  private _previousUrl: string;
  private _currentUrl: string;
  private _routeHistory: string[];

  constructor(router: Router) {
    this._routeHistory = [];
    router.events
      .pipe(filter(event => event instanceof NavigationEnd))
      .subscribe((event: NavigationEnd) => {
        this._setURLs(event);
      });
  }

  private _setURLs(event: NavigationEnd): void {
    const tempUrl = this._currentUrl;
    this._previousUrl = tempUrl;
    this._currentUrl = event.urlAfterRedirects;
    this._routeHistory.push(event.urlAfterRedirects);
  }

  get previousUrl(): string {
    return this._previousUrl;
  }

  get currentUrl(): string {
    return this._currentUrl;
  }

  get routeHistory(): string[] {
    return this._routeHistory;
  }
}

另一个解决方案

window.history.back ();

我是这么说的:

import { Location } from '@angular/common'
import { Component, Input } from '@angular/core'

@Component({
    selector: 'Back_page',
    template: `<button  (click)="onBack()">Back</button>`,
})
export class BackPageComponent {
  constructor(private location: Location) { }

  onBack() {
    this.location.back();// <-- go back to previous location
  }
}

RC4:

import {Location} from '@angular/common';