This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.
The read-only isFile
property of the FileSystemEntry
interface is true
if the entry represents a file (meaning it's a FileSystemFileEntry
) and false
if it's not.
You can also use isDirectory
to determine if the entry is a directory.
You should not assume that any entry which isn't a file is a directory 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 isFile = FileSystemEntry.isFile;
Value
A Boolean indicating whether or not the FileSystemEntry
is a file.
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 'isFile' in that specification. | Draft | Initial specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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.
See also
- File and Directory Entries API
- Introduction to the File System API
FileSystemEntry
FileSystemEntry.isDirectory
FileSystemFileEntry
FileSystemEntry.isFile by Mozilla Contributors is licensed under CC-BY-SA 2.5.