This h1 should be an h2.

docs/examples.html

@@ -135,7 +135,7 @@ $(".js-example-placeholder-multiple").select2({
           Other data sources
         </h1>
 
-        <h1 id="data-array" >Loading array data</h1>
+        <h2 id="data-array" >Loading array data</h2>
 
         <p>
           Select2 provides a way to load the data from a local array.