Javascript 克隆对象和更新视图

我有一个简单的服务来更新一个对象。我深度克隆初始对象并更新克隆对象

如您所见，它运行良好，但视图未更新。如何更新更改视图

代码如下：

还有一个问题，如何修改

number.three

传递函数路径的值，如：“number.three”？：请回答：

AppComponent

import { Component, OnInit } from '@angular/core';

import { ObjectService } from './object.service';

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

  private object: any;

  constructor (private objectService: ObjectService) {}

  ngOnInit () {
    this.object = this.objectService.getObject();
  }  

  changeObject () {
    this.objectService.changeObject('two', 'I\'m the one you need')
  }
}

  changeObject () {
    this.object =  this.objectService.changeObject('two', 'I\'m the one you need');

  }

ObjectService

import { Injectable } from '@angular/core';

@Injectable()
export class ObjectService {
    public object = {
      one: 'One',
      two: 'Two',
      number: {
        three: 'Three'
      }
    }

    public getObject () {
      return this.object;
    }

    public changeObject (path: string, value: any) {
      console.log('initial', this.object, path, value);
      let clone = { ...this.object, [path]: value };
      console.log('clone', clone);
      return this.object;
    }
}

查看

{{ object.one }}
<br>
{{ object.two }}
<br>
{{ object.number.three }}
<br>

<button (click)="changeObject()">Change object</button>

{{object.one}


{{object.two}


{{object.number.three}


更改对象

您需要在变更对象中指定返回值

import { Component, OnInit } from '@angular/core';

import { ObjectService } from './object.service';

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

  private object: any;

  constructor (private objectService: ObjectService) {}

  ngOnInit () {
    this.object = this.objectService.getObject();
  }  

  changeObject () {
    this.objectService.changeObject('two', 'I\'m the one you need')
  }
}

  changeObject () {
    this.object =  this.objectService.changeObject('two', 'I\'m the one you need');

  }

另外，我认为您需要返回克隆的对象，而不是对象

   public changeObject (path: string, value: any) {
      console.log('initial', this.object, path, value);
      let clone = { ...this.object, [path]: value };
      console.log('clone', clone);
      return clone;
    }

---

您可以使用

Object.assign（）

深度克隆您的对象是的，我知道，但您也会遇到同样的问题。是的，很好，它正在工作。（您忘记更新stackblitz）。关于我的第二个问题？没关系，我在这里找到了答案：