jquery - How can I use $ in ngOnInit or constructor?

I have a problem with using $ in constructor.
ngOnInit()
translate.instant etc.
here is my code:

declare var $: any;
{
    var SelectedDevice = $("#select2-example-basic".val();
}

and here is what i got when I tried to run this code.

I do not know why I couldnt use $ in constructur ngOnInit Translate.instant etc. but it works in other functions , for instance: in

onClick(){
    var infoDataTable = $('#basic-table').DataTable().page.info();
}

.. there is no error or fail...

and here is my html cod:

    

        


























            
                
                    
{{'Plate'|translate}}
                    
{{'Driver Name'|translate}}
                    
{{'Start Time'|translate}}
                    
{{'Starting Address'|translate}}
                    
{{'End Time'|translate}}
                    
{{'Ending Address'|translate}}
                    
{{'Work Duration'|translate}}
                    
{{'Distance'|translate}}
                
            
            
                
                    
{{item.Name}}
                    
{{item.DriverName}}
                    
{{item.StartTime | date:'dd.MM.yy hh:mm'}}
                    
{{item.StartAddress}}
                    
{{item.EndTime | date:'dd.MM.yy hh:mm'}}
                    
{{item.EndAddress}}
                    
{{item.RunningTime}}
                    
{{item.Km | distance}}