add pages

Author: Bunlong

index.html

@@ -20,6 +20,11 @@ <h3>Table of Contents</h3>
       <ul>
         <li><a href="async-initialization-in-componentdidmount.html">Async initialization in componentDidMount()</a></li>
         <li><a href="container-component.html">Container component</a></li>
+        <li><a href="accessing-a-child-component.html">Accessing a child component</a></li>
+        <li><a href="functional-setstate-(pass-a-function-to-setstate).html">Functional setState (Pass a function to setState)</a></li>
+        <li><a href="higher-order-component.html">Higher Order Component - Props proxy</a></li>
+        <li><a href="higher-order-function.html">Higher order function</a></li>
+        <li><a href="jsx-spread-attributes.html">JSX spread attributes</a></li>
       </ul>
     </ul>
   </div>