Right now I have a functional drag and copy. I was wondering if there was any way to drag copy, but not drop. For example, if a user held the shift key, he/she could rapidly click and drop clones without dropping the dragged element. If search high and low through the documentation and haven't found anything.
Here is my code https://jsfiddle.net/jado66/f8b4ms36/2/ :
<!DOCTYPE html>
<html>
<head>
<title>Drag Copy</title>
</head>
<style>
* {user-select: none; }
.cell {width:50px;height:50px;
}
img {width:50px;height:50px;cursor: move;}
table td #dropTable td:hover{background: #dedede;}
#dropTable {
border-spacing: 5px;
border: 1px solid #dedede;
}
.droppable:hover{
transform: scale(1.05);
transition-duration: 0.3s;
}
#dropTable tbody { height:300px; overflow-y:auto; }
</style>
<body>
<!-- Drag Table -->
<table style="border-spacing: 5px;">
<tr>
<td id="image1">
<div class = "cell" ondrop="drop(event)" ondragover="allowDrop(event)">
<img class = "droppable newGate" src="droppable" src="https://picsum.photos/500/500?random=1"
ondragstart="dragStart(event)" id="1" draggable="true"/> </div>
</td>
<td id="image2">
<div class = "cell " ondrop="drop(event)" ondragover="allowDrop(event)">
<img class = "droppable" src="https://picsum.photos/500/500?random=2"
ondragstart="dragStart(event)" id="2" draggable="true" /> </div>
</td>
</tr>
</table>
<hr>
<!-- Drop Table -->
<table>
<tr>
<td>
<table id="dropTable" >
<tr >
<td> <div class = "cell"></div></td>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
</tr>
<tr>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
</tr>
</tr>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
<td> <div class = "cell" ></div></td>
</tr>
</table>
</td>
</tr>
</table>
<script>
const cells = document.querySelectorAll(".cell:empty"); //We only want to add event listeners to empty cells
for (const cell of cells){
cell.addEventListener('dragover',allowDrop);
cell.addEventListener('drop',drop);
}
function dragStart(evt)
{
evt.dataTransfer.setData("Text",evt.target.id);
}
function drop(evt)
{
var data = evt.dataTransfer.getData("Text");
var nodeCopy = document.getElementById(data).cloneNode(true);
nodeCopy.id = Date.now(); /* We cannot use the same ID */
evt.target.appendChild(nodeCopy);
if (evt.shiftKey){
console.log("Shift key pressed. Copy but keep drag");
//Invoke drag command, or prevent drop, etc.
}
}
function allowDrop(ob)
{
ob.preventDefault();
}
</script>
</body>
</html>
from Is there a way to drag and copy, but prevent the drop with "draggable"? (JavaScript)
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