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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
enum WriteCommandType {
dictionary WriteParams {
required WriteCommandType type;
unsigned long long? size;
unsigned long long? position;
(BufferSource or Blob or USVString)? data;
typedef (BufferSource or Blob or USVString or WriteParams) FileSystemWriteChunkType;
[Exposed=(Window,Worker), SecureContext, Pref="dom.fs.enabled"]
interface FileSystemWritableFileStream : WritableStream {
Promise<void> write(FileSystemWriteChunkType data);
Promise<void> seek(unsigned long long position);
Promise<void> truncate(unsigned long long size);