Install npm install ng-clone-deep --save Use Import the service into every component import { Component, OnInit } from '@angular/core';import { NgCloneDeepService } from 'ng-clone-deep'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css']})export class AppComponent implements OnInit { source = [{name: 'Tom'}, {name: 'Jerry'}]; constructor(private cloneDeep: NgCloneDeepService) {} ngOnInit() { const sourceClone = this.cloneDeep.clone(this.source); // cloneDeep.clone() }} example Import the module into every module where you want to use the components. import { NgCloneDeepModule } from 'ng-clone-deep/public-api'; @NgModule({ imports: [ NgCloneDeepModule ]})export class AppModule {} <litwak-ng-clone-deep></litwak-ng-clone-deep>