The author actually goes into detail about why they created this project on the about page: https://runemadsen.github.io/rune.js/about.html

On a side note, regardless of the alternatives, or that there is a 'better' way to do things, I found this project very impressive.

The author has released their work open source (https://github.com/runemadsen/rune.js/blob/master/LICENSE). It is people like the author that drive large parts of our industry, with generous donation of their spare time. Given this, it is frustrating to see the unhelpful choice of words of people in this comments section.