From eb2a4486332371ebcdb4eaff4f02d4e919ecac29 Mon Sep 17 00:00:00 2001
From: Oliver Joseph Ash <oliverjash@gmail.com>
Date: Thu, 7 May 2020 13:46:16 +0100
Subject: [PATCH] Make `filter` optional

Fixes https://github.com/Alorel/shrink-ray/issues/52
---
 index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.d.ts b/index.d.ts
index 78b20f26..15fb6a6e 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -11,7 +11,7 @@ interface Filterable {
    * The default filter function uses the compressible module to determine if
    * res.getHeader('Content-Type') is compressible.
    */
-  filter(req: Request, res: Response): boolean;
+  filter?(req: Request, res: Response): boolean;
 }
 
 interface ShrinkRayOptions extends Filterable {