MDL includes a JS library and it seems that there is a complete rewrite underway at the moment.
Re:Material Components Preview
by joshtynjala on Thursday December 15, 2016 @04:49PM
(#13188777)
Yes, it appears that the web version of these new Material Components is considered the successor to MDL.
https://github.com/material-components/material-components-w...
I hate if I start using a lib, which is kind of half finished and then learn a few month later that work on this project has been stopped and I should use now the new shiny fade of the day successor which is also half finished. Seems to be the standard in the JS world where people change frameworks and libs more often then their underpants.
[0]https://design.google.com/resources/