denoland-deno/extensions/file/lib.deno_file.d.ts

// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.

/// <reference no-default-lib="true" />
/// <reference lib="esnext" />

type BlobPart = BufferSource | Blob | string;

interface BlobPropertyBag {
  type?: string;
  endings?: "transparent" | "native";
}

/** A file-like object of immutable, raw data. Blobs represent data that isn't necessarily in a JavaScript-native format. The File interface is based on Blob, inheriting blob functionality and expanding it to support files on the user's system. */
declare class Blob {
  constructor(blobParts?: BlobPart[], options?: BlobPropertyBag);

  readonly size: number;
  readonly type: string;
  arrayBuffer(): Promise<ArrayBuffer>;
  slice(start?: number, end?: number, contentType?: string): Blob;
  stream(): ReadableStream<Uint8Array>;
  text(): Promise<string>;
}

interface FilePropertyBag extends BlobPropertyBag {
  lastModified?: number;
}

/** Provides information about files and allows JavaScript in a web page to
 * access their content. */
declare class File extends Blob {
  constructor(
    fileBits: BlobPart[],
    fileName: string,
    options?: FilePropertyBag,
  );

  readonly lastModified: number;
  readonly name: string;
}