Web/API/FileSystemEntry/isDirectory

This is an experimental technologyCheck 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 APIThe definition of 'isDirectory' in that specification.	Draft	Initial specification.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`isDirectory` Experimental'	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 1.0

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.