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FileSystem

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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 File and Directory Entries API interface FileSystem is used to represent a file system. These objects can be obtained from the filesystem property on any file system entry. Some browsers offer additional APIs to create and manage file systems, such as Chrome's requestFileSystem() method.

Because this is a non-standard API, whose specification is not currently on a standards track, it's important to keep in mind that not all browsers implement it, and those that do may implement only small portions of it. Check the Browser compatibility section for details.

Basic concepts

There are two ways to get access to a FileSystem object:

  1. You can directly ask for one representing a sandboxed file system created just for your web app directly by calling window.requestFileSystem().  If that call is successful, it executes a callback handler, which receives as a parameter a FileSystem object describing the file system.
  2. You can get it from a file system entry object, through its filesystem property.

Properties

FileSystem.name Read only
A DOMString representing the file system's name. This name is unique among the entire list of exposed file systems.
FileSystem.root Read only
A FileSystemDirectoryEntry object which represents the file system's root directory. Through this object, you can gain access to all files and directories in the file system.

Specifications

Specification Status Comment
File and Directory Entries API Editor's Draft Draft of proposed API

This API has no official W3C or WHATWG specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Microsoft Edge Opera Safari (WebKit)
Basic support 13webkit 50 (50) No support (Yes)[1] No support No support
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support No support 0.16webkit 50.0 (50) No support No support No support

[1] Microsoft Edge implements this interface under the name WebKitFileSystem, and supports its use only in drag-and-drop scenarios using the DataTransferItem.webkitGetAsEntry() method. It's not available for use in file or folder picker panels (such as when you use an <input> element with the HTMLInputElement.webkitdirectory attribute.

See also

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