如果你使用的是最新的Angular/TypeScript，请确保你显式导入

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

and

 onCancel() {
    this.location.back();
  }

实际上，你可以利用内置的位置服务，它拥有一个“返回”API。

这里(TypeScript中):

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

@Component({
  // component's declarations here
})
class SomeComponent {

  constructor(private _location: Location) 
  {}

  backClicked() {
    this._location.back();
  }
}

编辑:正如@charith所提到的。Location应该从@angular/common中导入，所以从@angular/common中导入{Location};线条很重要。

检测到的未更改组件的@Parziphal答案版本:

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

  constructor(private readonly router: Router, private readonly location: Location) {
    location.onUrlChange(() => this.canGoBack = !!this.router.getCurrentNavigation()?.previousNavigation);
  }

  goBack(): void {
    if (this.canGoBack) {
      this.location.back();
    }
  }

用Angular 5.2.9测试过

如果你使用锚而不是按钮，你必须使用href="javascript:void(0)"将其设置为被动链接，以使Angular Location正常工作。

app.component.ts

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

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent {

  constructor( private location: Location ) { 
  }

  goBack() {
    // window.history.back();
    this.location.back();

    console.log( 'goBack()...' );
  }
}

app.component.html

<!-- anchor must be a passive link -->
<a href="javascript:void(0)" (click)="goBack()">
  <-Back
</a>

是的，你能做到。在你的typescript组件上编写这段代码，然后享受吧!

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

@Component({
    selector: 'return_page',
    template: `<button mat-button (click)="onReturn()">Back</button>`,
})
export class ReturnPageComponent {
  constructor(private location: Location) { }

  onReturn() {
    this.location.back();
  }
}

<按钮返回按钮>返回</button>

你可以把它放到一个指令中，这个指令可以附加到任何可点击的元素上:

import { Directive, HostListener } from '@angular/core';
import { Location } from '@angular/common';

@Directive({
    selector: '[backButton]'
})
export class BackButtonDirective {
    constructor(private location: Location) { }

    @HostListener('click')
    onClick() {
        this.location.back();
    }
}

用法:

<button backButton>BACK</button>