placeholder is optional

index.html

@@ -33,7 +33,7 @@
                 <div class="myform form-group">
 
                     <div emoji-form emoji-message="emojiMessage">
-                        <textarea class="form-control" id="messageInput" ng-model="emojiMessage.messagetext" placeholder="Write a message..."></textarea>
+                        <textarea class="form-control" id="messageInput" placeholder="Enter a message..." ng-model="emojiMessage.messagetext"></textarea>
 
 
                         <button class="btn btn-default im_emoji_btn pull-right visible-md visible-lg" id="emojibtn">

js/emojiDirectives.js

@@ -34,13 +34,9 @@ emojiApp.directive('emojiForm', ['$timeout', '$http', '$interpolate','$compile',
         {
             editorElement = richTextarea;
             $(richTextarea).addClass('form-control');
-            $(richTextarea)
-                .attr(
-                    'placeholder',
-                    $interpolate(
-                        $(messageField).attr(
-                            'placeholder'))(
-                        $scope));
+
+            if($(messageField).attr('placeholder'))
+                $(richTextarea).attr('placeholder',$interpolate($(messageField).attr('placeholder'))($scope));
 
             var updatePromise;
             $(richTextarea)