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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 read-only root property of the FileSystem interface specifies a FileSystemDirectoryEntry object representing the root directory of the file system, for use with the File and Directory Entries API.

Syntax

var rootDirEnt = FileSystem.root;

Value

A FileSystemDirectoryEntry representing the file system's root directory.

Example

// tbd

Specifications

Specification Status Comment
File and Directory Entries API
The definition of 'root' 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 AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
root
DeprecatedNon-standard
Chrome Full support 13Edge Full support YesFirefox Full support 50IE No support NoOpera Full support 15Safari No support NoWebView Android Full support 37Chrome Android Full support 18Firefox Android Full support 50Opera Android Full support 14Safari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.
Deprecated. Not for use in new websites.
Deprecated. Not for use in new websites.

See also

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最近更新: mdnwebdocs-bot,