<!DOCTYPE html>
<html>
<body>
<div id="editor" oncopy="copy(event)" onpaste="paste(event)" contenteditable>some text</div>
<script>

var URLToCopy = '';

function copy(event) {
    event.clipboardData.setData(`url`, URLToCopy);
    event.preventDefault();
    didCopy = true;
}

function paste(event) {
    pastedURL = event.clipboardData.getData(`url`);
    didPaste = true;
}

editor.focus();
</script>
</body>
</html>