Drag and Drop - How to get the actual html in dragstart event and drop event
Question
On dragstart event I want to get the actual html of dragged element. But when I do something like this in a dragstart event console.log( e.target); it give me the output like this as expected;
<p style="margin-right:72.45pt; margin-left:50.15pt; text-align:center; font-size:16pt" draggable="true"><strong>CONSULTING AND TECHNICAL SERVICES + (CATS+)</strong></p>
but this code console.log(JSON.stringify(e.target)); give me output like this ;
{"__zone_symbol__dragstartfalse":[{"type":"eventTask","state":"running","source":"HTMLParagraphElement.addEventListener:dragstart","zone":"angular","runCount":2}]}
when send data from dragstart to drop event like this
e.dataTransfer.setData('Id', e.target);
and then catch data from e.dataTransfer in drop event
let sourceElement = event.dataTransfer.getData("Id");
console.log((sourceElement).innerHTML);
console.log((sourceElement).outerHTML);
I end up with this output [object HTMLParagraphElement] Now , how I convert this [object HTMLParagraphElement] into a presentable HTML on UI as I tried .innerHTML and .outerHTML but it gives me undefined on screen rather proper output.
2 answers
solution1
0 2018-12-31 10:43:40
I would suggest the bottom approach to do this type of things.
<!DOCTYPE HTML>
<html>
<head>
<script>
function allowDrop(ev) {
ev.preventDefault();
}
function drag(ev) {
ev.dataTransfer.setData("text", ev.target.id);
}
function drop(ev) {
ev.preventDefault();
var data = ev.dataTransfer.getData("text");
ev.target.appendChild(document.getElementById(data));
}
</script>
</head>
<body>
<div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<img id="drag1" src="img_logo.gif" draggable="true"
ondragstart="drag(event)" width="336" height="69">
</body>
</html>
solution2
0 ACCPTED 2019-01-02 14:22:22
In dragestart event use this
e.dataTransfer.setData('text/html', e.currentTarget.outerHTML);
Instead of
e.dataTransfer.setData('Id', e.target);
While in drop event you will get the HTML string. Convert that string into an HTML element as follow
let sourceElement = event.dataTransfer.getData("text/html");
let doc: any = new DOMParser().parseFromString(sourceElement, "text/html");
var clonedSourceHtmlElement: HTMLElement = <HTMLElement>(<HTMLElement>doc.firstChild.children[1].children[0]).cloneNode(true);
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