From b8b8afd4048b4ba1181e00ba2ac49ced43936ce0 Mon Sep 17 00:00:00 2001
From: vlasy <vlasy@users.noreply.github.com>
Date: Mon, 18 Feb 2019 23:37:03 +0100
Subject: [PATCH] run-script: Check run script existence with undefined (#139)

PR-URL: https://github.com/npm/cli/pull/139
Credit: @vlasy
Reviewed-By: @zkat
---
 lib/run-script.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/run-script.js b/lib/run-script.js
index 3302576311719..476591c051e73 100644
--- a/lib/run-script.js
+++ b/lib/run-script.js
@@ -136,7 +136,7 @@ function run (pkg, wd, cmd, args, cb) {
       'prestart', 'start', 'poststart'
     ]
   } else {
-    if (!pkg.scripts[cmd]) {
+    if (pkg.scripts[cmd] == null) {
       if (cmd === 'test') {
         pkg.scripts.test = 'echo \'Error: no test specified\''
       } else if (cmd === 'env') {