Not really, I mean, it says No JS on one hand and then it says you can add JS, and you can even build your whole website using your favourite JS framework. So it is a little contradictory no? At least it does confuse me a little.
You can use your JS component library of choice, and decide whether a given component is rendered on the client or not (and certain conditions for what causes it to render). It doesn't render any of them on the client at all, by default.
The idea is if you built your site using a js framework but it turns out you don't need that much js, it will make as much of it into static html as possible and the leave the bits that simply must be dynamic as js.
