They supports React, Angular JS and Web Components. Website is very neat and clean, it's a real pleasure to navigate their site.
I created a simple and short video overview (no installation, or tutorials) https://www.youtube.com/watch?v=8I2YS7OCkpQ
The "Download" and "View on GitHub" buttons are 36px high, which violate the minimum 48px touch target height.
This is the kind of thing that really kills the illusion of a universal spec and turns web{sites,apps} into "lookalikes" rather than "the real thing".
Also, as someone who browses with a content-blocker, a complete rarity to come across a site that works fully with zero 3rd-party host dependencies.
It gives us a framework with mostly good choices (nothing is perfect) in order to build apps (or websites) that users can use more easily since they will gradually get used to its conventions.