FileSystemEntry.getParent()

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Non-standard
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 getParent() obtains a FileSystemDirectoryEntry.

Syntax

FileSystemEntry.getParent(successCallback[, errorCallback]);

Parameters

successCallback
A function which is called when the parent directory entry has been retrieved. The callback receives a single input parameter: a FileSystemDirectoryEntry object representing the parent directory. The parent of the root directory is considered to be the root directory, itself, so be sure to watch for that.
errorCallback Optional
An optional callback which is executed if an error occurs. There's a single parameter: a FileError describing what went wrong.

Return value

undefined.

Errors

FileError.INVALID_STATE_ERR
The operation failed because the file system's state doesn't permit it. This can happen, for example, if the file system's cached state differs from the actual state of the file system.
FileError.NOT_FOUND_ERR
The specified path could not be found.
FileError.SECURITY_ERR
Security restrictions prohibit obtaining the parent directory's information.

Example

This example renames  the file specified by the variable fileEntry to "newname.html".

fileEntry.getParent(function(parent) {
  fileEntry.moveTo(parent, "newname.html", function(updatedEntry) {
    console.log("File " + fileEntry.name + " renamed to newname.html.");
  });
}, function(error) {
  console.error("An error occurred: Unable to rename " + fileEntry.name
        + " to newname.html.");
});

This is accomplished by first obtaining a FileSystemDirectoryEntry object representing the directory the file is currently located in. Then moveTo() is used to rename the file within that directory.

Using promises

Currently, there isn't a Promise-based version of this method. You can, however, create a simple helper function to adapt it, like this:

function getParentPromise(entry) {
  return new Promise((resolve, reject) => {
    entry.getParent(resolve, reject);
  });
}

A similar approach can be taken elsewhere in the File and Directory Entries API.

Specifications

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

This API has no official W3C or WHATWG specification.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
ExperimentalNon-standard
Chrome Full support 13Edge ? Firefox No support NoIE No support NoOpera No support NoSafari No support NoWebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See also

Document Tags and Contributors

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