在此页

• 句法
• 范例
• 浏览器兼容性
• 另请参阅
• 相关话题

过时
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

FileSystemEntry 接口方法 copyTo () copies the file specified by the entry to a new location on the file system. There are some typical restrictions on what you can do:

• A directory can't be copied into itself.
• An entry can't be copied into its parent directory unless you specify a new name.
• When copying a directory, the copy is always recursive; you can't leave out subfolders.

句法

FileSystemEntry.copyTo(newParent[, newName][, successCallback][, errorCallback]);
					

参数

newParent

FileSystemDirectoryEntry object specifying the destination directory for the copy operation.

newName 可选

If this parameter is provided, the copy is given this string as its new file or directory name.

successCallback 可选

A function which is called when the copy operation is succesfully completed. Receives a single input parameter: a FileSystemEntry based object providing the copied item's new details.

errorCallback 可选

An optional callback which is executed if an error occurs while copying the items. There's a single parameter: a FileError describing what went wrong.

返回值

undefined .

错误

FileError.INVALID_MODIFICATION_ERR

The requested operation involves an impossible change, such as moving a directory inside itself or one of its own child directories, or copying an item within the same directory without renaming it.

FileError.QUOTA_EXCEEDED_ERR

The operation exceeded the user's storage quota, or there isn't enough storage space left to complete the operation.

范例

This example shows how a temporary log file might be moved into a more permanent "log" directory.

workingDirectory.getFile("tmp/log.txt", {}, function(fileEntry) {
  workingDirectory.getDirectory("log", {}, function(dirEntry) {
    fileEntry.copyTo(dirEntry);
  }, handleError);
}, handleError);
					

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
copyTo 弃用 非标	Chrome 8	Edge 79	Firefox No	IE No	Opera No	Safari No	WebView Android ≤37	Chrome Android 18	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android Yes

图例

完整支持

完整支持

不支持

不支持

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

非标。预期跨浏览器支持较差。

非标。预期跨浏览器支持较差。

弃用。不要用于新网站。

弃用。不要用于新网站。

另请参阅

• 文件和目录条目 API
• 文件系统 API 介绍

元数据

• 最后修改： Dec 25, 2019

相关话题

1. 文件和目录条目 API
2. FileSystemEntry
3. 特性

   1. filesystem
   2. fullPath
   3. isDirectory
   4. isFile
   5. 名称
4. 方法

   1. copyTo()
   2. getMetadata()
   3. getParent()
   4. moveTo()
   5. remove()
   6. toURL()
5. 文件系统 API 相关页面

   1. FileError
   2. FileException
   3. FileHandle
   4. FileRequest
   5. FileSystem
   6. FileSystemDirectoryEntry
   7. FileSystemDirectoryEntrySync
   8. FileSystemDirectoryReader
   9. FileSystemDirectoryReaderSync
   10. FileSystemEntrySync
   11. FileSystemFileEntry
   12. FileSystemFileEntrySync
   13. FileSystemFlags
   14. FileSystemSync
   15. HTMLInputElement
   16. LocalFileSystem
   17. LocalFileSystemSync
   18. LockedFile
   19. 元数据
   20. Window.requestFileSystem()
   21. Window.resolveLocalFileSystemURL()
   22. WorkerGlobalScope.requestFileSystemSync()