在此页

• 范例
• 浏览器兼容性
• 相关话题

FileReader.onload property contains an event handler executed when the load event is fired, when content read with readAsArrayBuffer , readAsBinaryString , readAsDataURL or readAsText 可用。

范例

// Callback from a <input type="file" onchange="onChange(event)">
function onChange(event) {
  var file = event.target.files[0];
  var reader = new FileReader();
  reader.onload = function(e) {
    // The file's text will be printed here
    console.log(e.target.result)
  };
  reader.readAsText(file);
}

					

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
onload	Chrome 7	Edge 12	Firefox 3.6	IE 10	Opera 11	Safari 6	WebView Android ≤37	Chrome Android 18	Firefox Android 32	Opera Android 11	Safari iOS 6.1	Samsung Internet Android 1.0

图例

完整支持

完整支持

元数据

• 最后修改： Mar 18, 2019

相关话题

1. FileReader
2. 构造函数

   1. FileReader()
3. 特性

   1. error
   2. onabort
   3. onload
   4. readyState
   5. result
4. 方法

   1. abort()
   2. readAsArrayBuffer()
   3. readAsBinaryString()
   4. readAsDataURL()
   5. readAsText()
5. 事件

   1. abort
   2. error
   3. load
   4. loadend
   5. loadstart
   6. progress
6. 继承：

   1. EventTarget