There are many rendering utilities for Koa:

• https://github.com/visionmedia/co-views
• https://github.com/queckezz/koa-views

However, in this example, we’ll render using Jade’s API.

Exercise

Render homepage.jade using Jade’s API.
Because we use Jade’s extends feature,
you probably need to use Jade’s asynchronous API as well as the .filename option.