How to fix and drop marker with leaflet in Ionic

By using Google map API in ionic I can fix marker in the center:

 #centerMarker {
    width: 22px;
    height: 40px;
    display: block;
    content: ' ';
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -40px 0 0 -11px;
    background: url('');
    background-size: 22px 40px; 
    pointer-events: none;   }

Drop Marker Function:

  let source = "origin";
   let image = 'assets/img/Untitled-1.png';   
   let marker = new google.maps.Marker({    
    animation: google.maps.Animation.DROP,
    draggable: true, icon: image

I am using leaflet Js ver: 1.3.1

JS link.

CSS link

I don’t know how to do this with leaflet

No any Idea or help?