From 3db56085062d71a74633a48aa40eec87e7d09d23 Mon Sep 17 00:00:00 2001
From: Alexander Marks <aomarks@google.com>
Date: Wed, 8 May 2019 16:41:37 -0700
Subject: [PATCH] Add check for //

---
 lib/utils/resolve-url.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/utils/resolve-url.js b/lib/utils/resolve-url.js
index fa98841801..5dd89cbcf2 100644
--- a/lib/utils/resolve-url.js
+++ b/lib/utils/resolve-url.js
@@ -28,6 +28,9 @@ export function resolveUrl(url, baseURI) {
   if (url && ABS_URL.test(url)) {
     return url;
   }
+  if (url === '//') {
+    return url;
+  }
   // Lazy feature detection.
   if (workingURL === undefined) {
     workingURL = false;