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<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width">
<head>
<style>
body, html {
width: 100%;
height: 100%;
}
body {
margin: 0;
}
#editor {
width: 200px;
height: 200px;
outline: 1px solid black;
}
#draggable {
background-color: red;
width: 200px;
height: 200px;
-webkit-user-select: all;
-webkit-user-drag: element;
display: inline-block;
}
</style>
</head>
<div id="draggable" draggable="true">This text should not be draggable without a red background.</div>
<div id="editor" contenteditable=""></div>
<div><code>To manually test, attempt to drag the colored block.</code></div>
<script>
draggable.addEventListener("dragstart", event => {
event.dataTransfer.setData("text/plain", "Text");
});
</script>
</html>
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