1 files changed, 20 insertions, 0 deletions
diff --git a/dom/webidl/FileSystemSyncAccessHandle.webidl b/dom/webidl/FileSystemSyncAccessHandle.webidl
new file mode 100644
index 0000000000..343f0798bf
--- /dev/null
+++ b/dom/webidl/FileSystemSyncAccessHandle.webidl
@@ -0,0 +1,20 @@
+/* -*- 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 http://mozilla.org/MPL/2.0/. */
+
+dictionary FileSystemReadWriteOptions {
+  [EnforceRange] unsigned long long at;
+};
+
+[Exposed=(DedicatedWorker), SecureContext, Pref="dom.fs.enabled"]
+interface FileSystemSyncAccessHandle {
+  // TODO: Use `[AllowShared] BufferSource data` once it works (bug 1696216)
+  [Throws] unsigned long long read(([AllowShared] ArrayBufferView or [AllowShared] ArrayBuffer) buffer, optional FileSystemReadWriteOptions options = {});
+  [Throws] unsigned long long write(([AllowShared] ArrayBufferView or [AllowShared] ArrayBuffer) buffer, optional FileSystemReadWriteOptions options = {});
+
+  [Throws] undefined truncate([EnforceRange] unsigned long long size);
+  [Throws] unsigned long long getSize();
+  [Throws] undefined flush();
+  undefined close();
+};