Passing variables between components without using @Input decorator in Angular 2

Question

I want pass the variable element obtained when the click event is trigerred in 'a' tag to the below component 'clr-modal'. I cant take that as input in 'clr-modal' component because I cant edit it. I need some hack so that i can do it html itself or any hack to do it apart from passing it as input to the nested component.

My code:

`<div class="card-block">
             <ul *ngFor="let element of inprogArr; trackBy: elementFn" class="list">
               <li>
                  <a (click)="opened=true; setval(element);">{{element.entry}}</a>
                  <clr-modal [(clrModalOpen)]="opened">
                   <h3 class="modal-title">{{element.entry}}</h3>
                    <div class="modal-body">
                    <p>Description :&emsp;{{element.entryDesc}}</p>
                    <br>
                   </div>
                   <div class="modal-footer">
                    <button (click)="moveInOn(element); opened=false;" type="submit" class="btn btn-sm" >Move to Ongoing</button>
                   <button (click)="moveInCo(element); opened=false;" type="submit" class="btn btn-sm">Move to Completed</button>
                   </div>
                    </clr-modal>

               </li>
            </ul>

        </div>`

Answer 1

There is no need to pass the element to the modal component. Because the clr-modal is making use of ng-content you are able to just reference the elements that exist in your current component. You should update your view to just define the modal once and then use a single property to hold the data of the currently opened modal like so:

<div class="card-block">
    <ul *ngFor="let element of inprogArr; trackBy: elementFn" class="list">
        <li>
            <a (click)="opened=true; setval(element); modalElement = element">{{element.entry}}</a>
        </li>
    </ul>
    <clr-modal [(clrModalOpen)]="opened">
        <h3 class="modal-title">{{modalElement?.entry}}</h3>
            <div class="modal-body">
                <p>Description :&emsp;{{modalElement?.entryDesc}}</p>
                <br>
            </div>
            <div class="modal-footer">
                <button (click)="moveInOn(modalElement); opened=false;" type="submit" class="btn btn-sm">Move to Ongoing</button>
                <button (click)="moveInCo(modalElement); opened=false;" type="submit" class="btn btn-sm">Move to Completed</button>
            </div>
    </clr-modal>
</div>

Demo