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 thecompatibility 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-standardWindow methodrequestFileSystem() method is a Google Chrome-specificmethod which lets a website or app gain access to a sandboxed file system for its ownuse. The returnedFileSystem is then available for use with the otherfile system APIs.
Note:This method is prefixed withwebkit in all browsers that implement it.
Syntax
requestFileSystem(type, size, successCallback)requestFileSystem(type, size, successCallback, errorCallback)Parameters
typeThe type of storage to request. Specify
Window.TEMPORARYif it'sacceptable for the browser to delete the files at its own discretion, such as ifstorage space runs low, orWindow.PERSISTENTif you need the files toremain in place unless the user or the website or app explicitly permit it.Persistent storage requires that the user grant the site quota.sizeThe amount of storage space you wish to have allocated for your app's use.
successCallbackA function which is invoked when the file system has been successfully obtained. Thecallback receives a single parameter: a
FileSystemobject representingthe file system the app has permission to use.errorCallbackOptionalAn optional parameter specifying a function which is called if an error occurs whileattempting to obtain the file system, or if the user denies permission to create oraccess 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 theFile and Directory Entries API proposal, it has no official W3C or WHATWG specification. It is no longer on track to become a standard.