files/zh-cn/web/api/globaleventhandlers/ondrop/index.html


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107

---
title: GlobalEventHandlers.ondrop
slug: Web/API/GlobalEventHandlers/ondrop
translation_of: Web/API/GlobalEventHandlers/ondrop
---
<div>drop 事件的全局处理函数</div>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">var <var>dropHandler</var> = <var>targetElement</var>.ondrop;
</pre>

<h3 id="返回值">返回值</h3>

<dl>
 <dt><code>dropHandler</code></dt>
 <dd>目标元素的 drop 事件处理函数。</dd>
</dl>

<h2 id="Example">Example</h2>

<p>下面这个示例演示了 ondrop 属性的用法来指定 drop 事件的处理函数。</p>

<pre class="brush: js">&lt;!DOCTYPE html&gt;
&lt;html lang=en&gt;
&lt;title&gt;Examples of using the ondrag Global Event Attribute&lt;/title&gt;
&lt;meta content="width=device-width"&gt;
&lt;style&gt;
  div {
    margin: 0em;
    padding: 2em;
  }
  #source {
    color: blue;
    border: 1px solid black;
  }
  #target {
    border: 1px solid black;
  }
&lt;/style&gt;
&lt;/head&gt;
&lt;script&gt;
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();
}
&lt;/script&gt;
&lt;body&gt;
&lt;h1&gt;Examples of &lt;code&gt;ondrag&lt;/code&gt;, &lt;code&gt;ondrop&lt;/code&gt;, &lt;code&gt;ondragstart&lt;/code&gt;, &lt;code&gt;ondragover&lt;/code&gt;&lt;/h1&gt;
 &lt;div class="source"&gt;
   &lt;p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true"&gt;
     Select this element, drag it to the Drop Zone and then release the selection to move the element.&lt;/p&gt;
 &lt;/div&gt;
 &lt;div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);"&gt;Drop Zone&lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</pre>

<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName("HTML WHATWG", "indices.html#ix-handler-ondrop", "ondrop")}}</td>
   <td>{{Spec2("HTML WHATWG")}}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName("HTML5.1", "index.html#ix-handler-ondrop", "ondrop")}}</td>
   <td>{{Spec2("HTML5.1")}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

{{Compat("api.GlobalEventHandlers.ondrop")}}

<h2 id="See_also">See also</h2>

<ul>
 <li>{{event("drop")}}</li>
</ul>