Window: requestFileSystem() method
Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.
The non-standard Window method
requestFileSystem() method is a Google Chrome-specific
method which lets a website or app gain access to a sandboxed file system for its own
use. The returned FileSystem is then available for use with the other file system APIs.
Note:
This method is prefixed with webkit in all browsers that implement it.
Syntax
requestFileSystem(type, size, successCallback)
requestFileSystem(type, size, successCallback, errorCallback)
Parameters
type-
The type of storage to request. Specify
Window.TEMPORARYif it's acceptable for the browser to delete the files at its own discretion, such as if storage space runs low, orWindow.PERSISTENTif 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
FileSystemobject representing the file system the app has permission to use. errorCallbackOptional-
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
DOMExceptionobject 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
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support
- No support
- No support
- Non-standard. Check cross-browser support before using.
- Deprecated. Not for use in new websites.
- Requires a vendor prefix or different name for use.