File extension type

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

File objects are generally retrieved from a FileList object returned as a result of a user selecting files using the input element, or from a drag and drop operation's DataTransfer object.

A File object is a specific kind of Blob, and can be used in any context that a Blob can. In particular, FileReader, URL.createObjectURL_static, createImageBitmap, the body option to fetch, and XMLHttpRequest accept both Blobs and Files.

See Using files from web applications for more information and examples.

on
Implemented types

Constructors

File(JSArray<BlobPart> fileBits, String fileName, [FilePropertyBag options])
factory

Properties

hashCode → int
The hash code for this object.
no setterinherited
lastModified → int
no setter
name → String
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
size → int
no setterinherited
type → String
no setterinherited
webkitRelativePath → String
no setter

Methods

arrayBuffer() → JSPromise<JSArrayBuffer>
The arrayBuffer() method of the Blob interface returns a Promise that resolves with the contents of the blob as binary data contained in an ArrayBuffer.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
slice([int start, int end, String contentType]) → Blob
The slice() method of the Blob interface creates and returns a new Blob object which contains data from a subset of the blob on which it's called.
inherited
stream() → ReadableStream
The stream() method of the Blob interface returns a ReadableStream which upon reading returns the data contained within the Blob.
inherited
text() → JSPromise<JSString>
The text() method of the Blob interface returns a Promise that resolves with a string containing the contents of the blob, interpreted as UTF-8.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited