This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
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 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. |
Editor's Draft | Initial specification. |
This API has no official W3C or WHATWG specification.
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 13 webkit | 50 (50) | No support | No support | No support |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | No support | 0.16 webkit | 50.0 (50) | No support | No support | No support |