Show HN: wcwidth-o1 – Find Unicode text cell width in no time for JavaScript/TS

16 points by dawson0 3 days ago

I ported Markus Kuhn’s wcwidth to TypeScript and optimized it with bitset lookups for O(1) performance. It now covers the full Unicode 15.1 combining ranges.

GitHub: https://github.com/dawsonhuang0/Wcwidth-O1 NPM: https://www.npmjs.com/package/wcwidth-o1

Feedback welcome!

jv22222 2 days ago

I was about to say you could figure this kind of thing out with Intl.Segmenter but then saw it was a different problem. Nice.

shawn_w 2 days ago

Now you just have to update it to the just-released Unicode 17.

dawson0 14 minutes ago

Thanks for pointing it out! The latest version is now based on Unicode 17.0.0.

peter-m80 2 days ago

Nice