--- title: GlobalEventHandlers.ondrag slug: Web/API/GlobalEventHandlers/ondrag translation_of: Web/API/GlobalEventHandlers/ondrag ---

一个{{event("drag")}}事件的{{domxref("GlobalEventHandlers","global event handler")}}。

语法

var dragHandler = targetElement.ondrag;

返回值

dragHandler: 元素 targetElement的drag事件handler。

例子

这个例子展示了使用ondrag属性handler设置一个元素的drag事件handler。

<!DOCTYPE html>
<html lang=en>
<title>Examples of using the ondrag Global Event Attribute</title>
<meta content="width=device-width">
<style>
  div {
    margin: 0em;
    padding: 2em;
  }
  #source {
    color: blue;
    border: 1px solid black;
  }
  #target {
    border: 1px solid black;
  }
</style>
</head>
<script>
function drag_handler(ev) {
 console.log("Drag");
}

function dragstart_handler(ev) {
 console.log("dragStart");
 ev.dataTransfer.setData("text", ev.target.id);
}

function drop_handler(ev) {
 console.log("Drop");
 ev.currentTarget.style.background = "lightyellow";

 ev.preventDefault();
 var data = ev.dataTransfer.getData("text");
 ev.target.appendChild(document.getElementById(data));
}

function dragover_handler(ev) {
 console.log("dragOver");
 ev.preventDefault();
}
</script>
<body>
<h1>Examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1>
 <div> <!-- <div class="source"> -->
   <p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true">
     Select this element, drag it to the Drop Zone and then release the selection to move the element.</p>
 </div>
 <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">Drop Zone</div>
</body>
</html>

规范

规范	状态	备注
{{SpecName("HTML WHATWG", "indices.html#ix-handler-ondrag", "ondrag")}}	{{Spec2("HTML WHATWG")}}
{{SpecName("HTML5.1", "index.html#ix-handler-ondrag", "ondrag")}}	{{Spec2("HTML5.1")}}	初始定义

浏览器兼容性

参考

{{event("drag")}}