Update 2013-06-04-why-react.md

_posts/2013-06-04-why-react.md

@@ -31,6 +31,9 @@ see as an advantage over templates for a few reasons:
   **no manual string concatenation** and therefore less surface area for XSS
   vulnerabilities.
 
+We've also created [JSX](facebook.github.io/react/docs/syntax.html), an optional
+syntax extension, in case you prefer the readability of HTML to raw JavaScript.
+
 ## Reactive updates are dead simple.
 
 React really shines when your data changes over time.