From d5d78839be0ed1c39bdee0c2b20627d94107f4ed Mon Sep 17 00:00:00 2001
From: Gareth Jones <jones258@gmail.com>
Date: Fri, 12 Jul 2019 08:19:22 +1200
Subject: [PATCH] =?UTF-8?q?fix:=20=F0=9F=90=9B=20refactor=20`#mkdir`=20to?=
 =?UTF-8?q?=20be=20compatible=20w/=20`strictNullChecks`?=
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---
 src/volume.ts | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/volume.ts b/src/volume.ts
index 3ca91150..b624e625 100644
--- a/src/volume.ts
+++ b/src/volume.ts
@@ -337,7 +337,7 @@ const mkdirDefaults: IMkdirOptions = {
   mode: MODE.DIR,
   recursive: false,
 };
-const getMkdirOptions = options => {
+const getMkdirOptions = (options): IMkdirOptions => {
   if (typeof options === 'number') return extend({}, mkdirDefaults, { mode: options });
   return extend({}, mkdirDefaults, options);
 };
@@ -1848,8 +1848,9 @@ export class Volume {
   mkdir(path: TFilePath, callback: TCallback<void>);
   mkdir(path: TFilePath, mode: TMode | IMkdirOptions, callback: TCallback<void>);
   mkdir(path: TFilePath, a: TCallback<void> | TMode | IMkdirOptions, b?: TCallback<void>) {
-    const [options, callback] = getArgAndCb<TMode | IMkdirOptions, void>(a, b);
-    const opts = getMkdirOptions(options);
+    const opts: TMode | IMkdirOptions = getMkdirOptions(a);
+    const callback: TCallback<void> = validateCallback(typeof a === 'function' ? a : b);
+
     const modeNum = modeToNumber(opts.mode, 0o777);
     const filename = pathToFilename(path);
     if (opts.recursive) this.wrapAsync(this.mkdirpBase, [filename, modeNum], callback);