Added constructor select(css) and tested his

example/index.html

@@ -331,6 +331,7 @@
             rows="5"
             class="textareaStyle"
             placeholder="Enter CSS properties"
+            disabled="disabled"
           ></textarea>
           <button type="button" class="check-code render">Render</button>
           <button type="button" class="check-code saveStyle">Save style</button>