From 3e3c992c135df489b066c4ac5a5dc022a5ce515c Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Sat, 6 Jul 2019 22:42:10 +1200
Subject: [PATCH] =?UTF-8?q?fix:=20=F0=9F=90=9B=20allow=20`=5FmodeToNumber`?=
 =?UTF-8?q?=20to=20return=20`undefined`?=
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---
 src/volume.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/volume.ts b/src/volume.ts
index 7b356902..ad45497a 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -453,7 +453,7 @@ function nullCheck(path, callback?) {
   return true;
 }
 
-function _modeToNumber(mode: TMode, def?): number {
+function _modeToNumber(mode: TMode, def?): number | undefined {
   if (typeof mode === 'number') return mode;
   if (typeof mode === 'string') return parseInt(mode, 8);
   if (def) return modeToNumber(def);