seek should return cursor position (#4211)

1 files changed, 5 insertions, 4 deletions

diff --git a/cli/js/lib.deno.shared_globals.d.ts b/cli/js/lib.deno.shared_globals.d.ts
index bec9469c5..fef155f3d 100644
--- a/cli/js/lib.deno.shared_globals.d.ts
+++ b/cli/js/lib.deno.shared_globals.d.ts
@@ -1191,13 +1191,14 @@ declare namespace __io {
      * relative to the start of the file and an error, if any.
      *
      * Seeking to an offset before the start of the file is an error. Seeking to
-     * any positive offset is legal, but the behavior of subsequent I/O
-     * operations on the underlying object is implementation-dependent.
+     * any positive offset is legal, but the behavior of subsequent I/O operations
+     * on the underlying object is implementation-dependent.
+     * It returns the cursor position.
      */
-    seek(offset: number, whence: SeekMode): Promise<void>;
+    seek(offset: number, whence: SeekMode): Promise<number>;
   }
   export interface SyncSeeker {
-    seekSync(offset: number, whence: SeekMode): void;
+    seekSync(offset: number, whence: SeekMode): number;
   }
   export interface ReadCloser extends Reader, Closer {}
   export interface WriteCloser extends Writer, Closer {}