How to Create a Text Box Dynamically in JavaScript. Some call it magic -- the ability to make objects appear suddenly out of nowhere. You can create this kind of magic on your website using a few ...

An open source tool called Iroh.js, currently in beta development, allows JavaScript developers to perform dynamic code analysis to see exactly how their code behaves at execution.

In short, dynamic rendering is Google's way of helping you get your JavaScript sites indexed by Google. Google's John Mueller began explaining it a the 21 minute mark into the video.