From a42037eadd35708c4de31c4854c6c927747b5908 Mon Sep 17 00:00:00 2001
From: Elton Chen-Yu Ho <b01505026@ntu.edu.tw>
Date: Mon, 8 Jan 2018 22:07:40 +0300
Subject: [PATCH] Fix error when menu URL shorter than 4 characters is set

Fix the error when calling slicestr to slice out-of-range bounds

See #439
---
 layouts/partials/navbar.html | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/layouts/partials/navbar.html b/layouts/partials/navbar.html
index adb00f44..f344e68e 100644
--- a/layouts/partials/navbar.html
+++ b/layouts/partials/navbar.html
@@ -51,11 +51,13 @@
         </li>
 
         {{ else }}
-
-        {{ if eq "http" (slicestr .URL 0 4) }}
-          {{ $.Scratch.Set "target" " target=\"_blank\" rel=\"noopener\"" }}
-        {{ else }}
-          {{ $.Scratch.Set "target" "" }}
+        
+        {{/* Set target for link. */}}
+        {{ $.Scratch.Set "target" "" }}
+        {{ if gt (len .URL) 4 }}
+          {{ if eq "http" (slicestr .URL 0 4) }}
+            {{ $.Scratch.Set "target" " target=\"_blank\" rel=\"noopener\"" }}
+          {{ end }}
         {{ end }}
 
         <li class="nav-item">