File

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

* Some parts of this feature may have varying levels of support.

Note: This feature is available inWeb Workers.

TheFile interface provides information about files and allows JavaScript in a web page to access their content.

File objects are generally retrieved from aFileList object returned as a result of a user selecting files using the<input> element, or from a drag and drop operation'sDataTransfer object.

AFile object is a specific kind ofBlob, and can be used in any context that a Blob can. In particular, the following APIs accept bothBlobs andFile objects:

SeeUsing files from web applications for more information and examples.

Constructor

File(): Returns a newly constructedFile.

Instance properties

TheFile interface also inherits properties from theBlob interface.

File.lastModifiedRead only: Returns the last modified time of the file, in millisecond since the UNIX epoch (January 1st, 1970 at Midnight).
File.lastModifiedDateDeprecatedRead only Non-standard: Returns the last modified Date of the file referenced by theFile object.
File.nameRead only: Returns the name of the file referenced by theFile object.
File.webkitRelativePathRead only: Returns the path the URL of theFile is relative to.