How to render stuff after using .filter method

[covert trail]

I am not able to render the stuff that I want to after clicking the Hyouka button
https://scrimba.com/scrim/cpJLm9s3

[tacit linden]

Here's a solution,
I added some comments so you can understand it.

https://scrimba.com/scrim/co7894322b0540eb081a149c4