This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The FileSystemEntry interface's method 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.


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


A FileSystemDirectoryEntry object specifying the destination directory for the copy operation.
newName Optional
If this parameter is provided, the copy is given this string as its new file or directory name.
successCallback Optional
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 Optional
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.

Return value



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


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) {
  }, handleError);
}, handleError);


Specification Status Comment
File and Directory Entries API
The definition of 'copyTo()' in that specification.
Editor's Draft Initial specification.

This API has no official W3C or WHATWG specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 13 webkit No support No support No support No support
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support No support 0.16webkit No support No support No support No support

See also

Document Tags and Contributors

 Contributors to this page: Sheppy
 Last updated by: Sheppy,