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. 
 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. 
 A FileSystemDirectoryEntry representing the file system's root directory. 
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| File and Directory Entries API  # dom-filesystem-root  | 
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| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
root | 
7 | ≤18 | 50 | No | 15 | 11.1 | ≤37 | 18 | 50 | 14 | 11.3 | 1.0 | 
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    https://developer.mozilla.org/en-US/docs/Web/API/FileSystem/root