From f6793e5fb331d1091702aa2055cb801e133c387f Mon Sep 17 00:00:00 2001
From: kuoruan <kuoruan@gmail.com>
Date: Fri, 5 May 2017 10:26:46 +0800
Subject: [PATCH] Fix "Cannot read property 'replace' of undefined"

Signed-off-by: kuoruan <kuoruan@gmail.com>
---
 js/directives/textarea.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/js/directives/textarea.js b/js/directives/textarea.js
index 03e54f0..3688a63 100644
--- a/js/directives/textarea.js
+++ b/js/directives/textarea.js
@@ -4,7 +4,13 @@ webui.directive("textarea", function() {
     link: function(scope, element) {
       element.attr(
         "placeholder",
-        element.attr("placeholder").replace(/\\n/g, "\n")
+        function(index, placeholder) {
+          if (placeholder !== undefined) {
+            return placeholder.replace(/\\n/g, "\n");
+          } else {
+            return placeholder;
+          }
+        }
       ).bind("keydown keypress", function(event) {
         if (event.ctrlKey && event.which === 13) {
           event.preventDefault();