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• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

If the item is a file, the DataTransferItem.getAsFile() method returns the drag data item's File object. If the item is not a file, this method returns null .

句法

File = DataTransferItem.getAsFile();
					

参数

None.

返回值

File

If the drag data item is a file, a File object is returned; otherwise null 被返回。

范例

This example shows the use of the getAsFile() method in a drop event handler.

function drop_handler(ev) {
 console.log("Drop");
 ev.preventDefault();
 var data = event.dataTransfer.items;
 for (var i = 0; i < data.length; i += 1) {
   if ((data[i].kind == 'string') &&
       (data[i].type.match('^text/plain'))) {
     // This item is the target node
     data[i].getAsString(function (s){
       ev.target.appendChild(document.getElementById(s));
     });
   } else if ((data[i].kind == 'string') &&
              (data[i].type.match('^text/html'))) {
     // Drag data item is HTML
     console.log("... Drop: HTML");
   } else if ((data[i].kind == 'string') &&
              (data[i].type.match('^text/uri-list'))) {
     // Drag data item is URI
     console.log("... Drop: URI");
   } else if ((data[i].kind == 'file') &&
              (data[i].type.match('^image/'))) {
     // Drag data item is an image file
     var f = data[i].getAsFile();
     console.log("... Drop: File ");
   }
 }
}
					

规范

规范	状态	注释
HTML 实时标准 The definition of 'getAsFile()' in that specification.	实时标准	初始值
HTML 5.1 The definition of 'getAsFile()' in that specification.	推荐	Snapshot of the HTML WHATWG document

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
getAsFile	Chrome 11	Edge 12	Firefox 50	IE No	Opera 12	Safari 5.1	WebView Android 4	Chrome Android 18	Firefox Android 50	Opera Android No	Safari iOS 5	Samsung Internet Android 1.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

• DataTransfer.files()

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. HTML 拖放 API
2. DataTransferItem
3. 特性

   1. kind
   2. type
4. 方法

   1. getAsFile()
   2. getAsString()
   3. webkitGetAsEntry()
5. Related pages for HTML Drag and Drop API

   1. DataTransfer
   2. DataTransferItemList
   3. DragEvent