Web/API/File/File

The File() constructor creates a new File object instance.

Syntax

new File(bits, name[, options]);

bits: An Array of ArrayBuffer, ArrayBufferView, Blob, USVString objects, or a mix of any of such objects, that will be put inside the File. USVString objects are encoded as UTF-8.
name: A USVString representing the file name or the path to the file.
options Optional: An options object containing optional attributes for the file. Available options are as follows:

type

A DOMString representing the MIME type of the content that will be put into the file. Defaults to a value of "".
lastModified: A number representing the number of milliseconds between the Unix time epoch and when the file was last modified. Defaults to a value of Date.now().

var file = new File(["foo"], "foo.txt", {
  type: "text/plain",
});

Specification	Status	Comment
File API	Working Draft	Initial definition

	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
`File()` constructor	Chrome Full support 38	Edge Full support 79	Firefox Full support 28	IE No support No	Opera Full support 25	Safari Full support 10	WebView Android Full support 38	Chrome Android Full support 38	Firefox Android Full support 28	Opera Android Full support 25	Safari iOS Full support 10	Samsung Internet Android Full support 3.0