[sidpatil]

Is there a JS library which adds robust support for citations to webpages?

If MathJax/KaTeX is the Javascript version of LaTeX math mode, then what's the Javascript version of Bib(La)TeX?

[jszymborski]

I don't know if this fits your KaTeX analogy, but citeproc has a javascript implementation. Uses CSL-JSON to render citations.

https://github.com/Juris-M/citeproc-js