@knowler @bramus @hi_mayank @Meyerweb This is a very cool API, and I can definitely see value in removing the JS dependency.

I wonder if a slightly more feasible approach might be to define a syntax for declaring token ranges. Then Prism could emit these spans and styling. Something like:

```
<code highlights="keyword 0 4 identifier 6 8 comment 12 18">
const foo = // ...
</code>
```

(Range 0-4 is a `keyword`, range 6-8 is an `identifier`, etc. All subject to `::highlight` styles of those names.)

This feels like a lot less complexity in the browser, but the downside is that each `<code>` block needs it's own token ranges. I think Prism could still do this, but the advantage of @knowler's approach is using a single grammer for all `<code>` blocks in that language.