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<!DOCTYPe html>
<meta charset='utf-8'>
<title>drag and drop – feedback overlay for heavily styled elements – 008</title>
a {
display: block;
height: 200px;
width: 200px;
background-color: blue;
position: absolute;
top: 100px;
left: 10px;
z-index: 1;
div {
background-color: orange;
position: absolute;
height: 200px;
width: 200px;
top: 150px;
left: 20px;
z-index: 2;
opacity: 0.9;
<p>Click and hold the part of the orange box that overlaps the blue box. Then
move your pointing device. The blue box should <em>not</em> be dragged.
<a draggable="true" ondragstart="event.dataTransfer.effectAllowed ='copy'">TEST</a>