npm_modules: Fork bower_components into Polymer 0.4.0 and 0.5.0 versions

polymer_0.5.0/bower_components/marked-element/marked-element.html

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 Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 Code distributed by Google as part of the polymer project is also
 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
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 <link rel="import" href="../polymer/polymer.html">
@@ skipping 16 matching lines @@
 
     attached: function() {
       marked.setOptions({
         highlight: this.highlight.bind(this)
       });
       if (!this.text) {
         this.text = this.innerHTML;
       }
     },
 
-    textChanged: function () {
-      this.innerHTML = marked(this.text);
+    textChanged: function (oldVal, newVal) {
+      if (newVal) {
+        this.innerHTML = marked(this.text);
+      }
     },
 
     highlight: function(code, lang) {
       var event = this.fire('marked-js-highlight', {code: code, lang: lang});
       return event.detail.code || code;
     }
 
   });
 
 </script>
 </polymer-element>