【简报】超棒的拖放式文件上传javascript类库：FileDrop
日期：2012-8-30 来源：GBin1.com
今天推荐一款来自俄国web开发人员的支持拖放的跨浏览器javascript文件上传类库：FileDrop。
主要特性
- 跨浏览器
- 独立并且体积非常小
- 支持不同的callback
- 使用iframe作为fallback
- 多文件选择
- 支持多个FileDrop实例
- 文档比较全
如何使用
最少的代码如下：
<!DOCTYPE html>
<html>
<head>
<title>Basic FileDrop example</title>
<script type="text/javascript" src="http://proger.i-forge.net/filedrop-min.js"></script>
<style type="text/css">
/* Essential FileDrop element configuration: */
.fd-zone {
position: relative;
overflow: hidden;
width: 15em;
text-align: center;
}
/* Hides <input type="file" /> while simulating "Browse" button: */
.fd-file {
opacity: 0;
font-size: 118px;
position: absolute;
right: 0;
top: 0;
z-index: 1;
padding: 0;
margin: 0;
cursor: pointer;
filter: alpha(opacity=0);
font-family: sans-serif;
}
/* Provides visible feedback when use drags a file over the drop zone: */
.fd-zone.over { border-color: maroon; }
</style>
</head>
<body>
<!-- A FileDrop area. Can contain any text or elements, or be empty.
Can be of any HTML tag too, not necessary fieldset. -->
<fieldset id="zone">
<legend>Drop a file inside…</legend>
<p>Or click here to <em>Browse</em>..</p>
</fieldset>
<script type="text/javascript">
// Tell FileDrop we can deal with iframe uploads using this URL:
var options = {iframe: {url: 'your-upload-script.php'}};
// Attach FileDrop to an area:
var zone = new FileDrop('zone', options);
// Do something when a user chooses or drops a file:
zone.on.send.push(function (files) {
// if browser supports files[] will contain multiple items.
for (var i = 0; i < files.length; i++) {
files[i].SendTo('your-upload-script.php');
}
});
</script>
</body>
</html>
......
来源：【简报】超棒的拖放式文件上传javascript类库：FileDrop
