This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The read-only isDirectory
property of the FileSystemEntry
interface is true
if the entry represents a directory (meaning it's a FileSystemDirectoryEntry
) and false
if it's not.
You can also use isFile
to determine if the entry is a file.
You should not assume that any entry which isn't a directory is a file or vice-versa. There are other types of file descriptors on many operating systems. Be sure to use both isDirectory
and isFile
as needed to ensure that the entry is something you know how to work with.
Syntax
var isDirectory = FileSystemEntry.isDirectory;
Value
A Boolean indicating whether or not the FileSystemEntry
is a directory.
Example
This example shows how this property might be used to determine whether to process the entry as a directory or file. If the entry is neither, an error handler is called with an appropriate message.
if (entry.isDirectory) { processSubdirectory(entry); } else if (entry.isFile) { processFile(entry); } else { displayErrorMessage("Unsupported file system entry specified."); }
Specifications
Specification | Status | Comment |
---|---|---|
File and Directory Entries API The definition of 'isDirectory' in that specification. |
Draft | Initial specification. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
isDirectory | Chrome Full support 8 | Edge Full support 79 | Firefox Full support 50 | IE No support No | Opera No support No | Safari Full support 11.1 | WebView Android Full support ≤37 | Chrome Android Full support 18 | Firefox Android Full support 50 | Opera Android No support No | Safari iOS Full support 11.3 | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.