EDIT: HN title said Compiler, article says Library.
The title didn't say compiler, it just said "Google Closure". The article I linked to is very clear that it's about the library.
> ClojureScript is and never was only just for rich web applications. Even in the post React-world, a large portion of the web is (sensibly) still using jQuery. If you need robust DOM manipulation, internationalization, date/time handling, color value manipulation, mathematics, programmatic animation, browser history management, accessibility support, graphics, and much more, all without committing to a framework and without bloating your final JavaScript artifact - ClojureScript is a one stop shop.