Syntax

requestFileSystem(type, size, successCallback)
requestFileSystem(type, size, successCallback, errorCallback)

Parameters

type

The type of storage to request. Specify Window.TEMPORARY if it's acceptable for the browser to delete the files at its own discretion, such as if storage space runs low, or Window.PERSISTENT if you need the files to remain in place unless the user or the website or app explicitly permit it. Persistent storage requires that the user grant the site quota.

size

The amount of storage space you wish to have allocated for your app's use.

successCallback

A function which is invoked when the file system has been successfully obtained. The callback receives a single parameter: a FileSystem object representing the file system the app has permission to use.

errorCallback Optional

An optional parameter specifying a function which is called if an error occurs while attempting to obtain the file system, or if the user denies permission to create or access the file system. The callback receives as input a single parameter: a DOMException object describing the error.

Return value

None (undefined).

Specifications

As this method was removed from the File and Directory Entries API proposal, it has no official W3C or WHATWG specification. It is no longer on track to become a standard.

Browser compatibility