Strange that online it fell out of favor, because text justification was the default for centuries. It's still around in most PDFs though, e.g. in research papers.
This led to the CSS `text-wrap` property, and `text-wrap: pretty`[2], but pretty is not supported in FF yet, and the value `pretty` doesn't mandate Knuth's algorithm.
[1]: https://bugzilla.mozilla.org/show_bug.cgi?id=630181
[2]: https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/P...