How to convert to angular 2 with javascript?

Question

JavaScript

Hello!
There is a code written in javascript-e.
Here is a link there .
Now it needs to be rewritten to angular2.
I was able to overwrite the first two functions.
Can't do the last one.
Here is a link to my angular2
Look please, can someone get it...
Thank you

Answer 1

If you don't mind, here is the link

Answer 2

I would make a component with this thing and on ngOnInit I would call the code that is in DOMContentLoaded