FileSystemEntry.isFile
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 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 API The definition of 'isFile' 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 |
See also
- File and Directory Entries API
- Introduction to the File System API
FileSystemEntry
FileSystemEntry.isDirectory
FileSystemFileEntry
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/filesystementry/isfile