JSFiddle - React, Tailwind, and code Playground

HTML

<div id="list">
  <div class="el" draggable="true" ondragstart="onDrag(event)">ELEMENT A</div>
  <div class="el" draggable="true" ondragstart="onDrag(event)">ELEMENT B</div>
  <div class="el" draggable="true" ondragstart="onDrag(event)">ELEMENT C</div>
</div>
<div id="target" ondragover="onContainerOver(event)">
</div>

CSS

#list{
  
}

.el{
  height: 20px;
  margin: 10px;
  border: solid 1px black;
  background-color: blue;
}

#target{
  min-height: 200px;
  width: 100%;
  background-color: grey;
}

JavaScript

function onDrag(ev){
  var el = ev.srcElement;
  console.log("Drag: " + ev.srcElement.outerHTML)
  ev.dataTransfer.setData('text/html', ev.srcElement.outerHTML);
}

function onContainerOver(ev){
  ev.preventDefault();
  ev.dataTransfer.dropEffect = "move"
}

function onContainerDrop(ev){
  ev.preventDefault();
  console.log("Drop: " + ev.dataTransfer.getData("text/html"))
  ev.currentTarget.innerHTML = 	 ev.dataTransfer.getData("text/html");
}

document.getElementById('target').addEventListener('drop', onContainerDrop, true); // This should not bubble, but it does. Target is always the child first rather than the element where the event listener resides. Why???