W3Schools 试用编辑器 - W3Schools 中文教程

<!DOCTYPE HTML>
<html>
<style>
#droptarget {
  width: 200px; 
  height: 35px;
  padding: 10px;
  border: 1px solid black;
}
</style>

<body>
<h1>HTML DOM Events</h1>
<h2>The ondragover Event</h2>

<p>Use the HTML DOM to assign an "ondragstart" and "ondrag" event to a p element and an "ondragover" and "ondrop" event to a div element.</p>

<p draggable="true" id="dragtarget">Drag me into the rectangle!</p>

/* Events fired on the drag target */
drag.ondragstart = function(event) {
  event.dataTransfer.setData("Text", event.target.id);
};

drag.ondrag = function(event) {
  document.getElementById("demo").innerHTML = "The text is being dragged.";
};

/* Events fired on the drop target */
drop.ondragover = function(event) {
  event.preventDefault();
  document.getElementById("demo").innerHTML = "The text is OVER the droptarget.";
  event.target.style.border = "4px dotted purple";
};

drop.ondrop = function(event) {
  event.preventDefault();
  const data = event.dataTransfer.getData("Text");
  event.target.appendChild(document.getElementById(data));
  document.getElementById("demo").innerHTML = "The text was dropped.";
};
</script>

</body>
</html>