CODE EXAMPLE FOR JAVASCRIPT

Angular after click add active class and remove from siblings

import { Output, EventEmitter } from '@angular/core';
@Output() itemSelectEvent= new EventEmitter<string>();

select(array_item){
itemSelectEvent.emit(array_item.id);
}

<app-item-desc *ngFor="let itemDesc of addedItem; let i = index" [itemlistDesc]="itemDesc" (itemSelectEvent)="selectEventHandler($event)"></app-item-desc>

selectEventHandler(event){
 // event, you will get selected id here
 for(let i=0;i < addedItem.length;i++){
   if(addedItem[i].id == event){
    addedItem[i]['is_active'] = true;
   }else{
    addedItem[i]['is_active'] = false;
   }
 }
}

<div class="order" (click)="select($event)" [ngClass]="{'active': itemlistDesc.is_active}">

</div>