Show HN: Extend UI – open-source UI kit for modern document apps • Hacker News Board

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#41

Post by andrewlu0 » Thu, Jun 11, 2026, 12:56 AM UTC

pea wrote: post #38

Looks cool but your home page heavily lags on my mbp m3 pro - you should maybe be lazy loading vs loading all your components upfront

Valid feedback a few other comments have mentioned , I’m going to try improving the home page tomorrow

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#42

Post by ranger_danger » Thu, Jun 11, 2026, 1:40 AM UTC

digitaltrees wrote: post #37

spankalee wrote: post #2

These should really be web components. Leaving out every framework other than React is really bad for the web.

Then build it yourself. They do work for free, give it to the world, and your response is: do it differently the way I want.

let's all try to be nicer

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#43

Post by carlosjobim » Thu, Jun 11, 2026, 1:44 AM UTC

Excellent that you offer Miller columns, one of the best tools for computing and information browsing, and management. The world should run on Miller columns.

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#44

Post by cactusplant7374 » Thu, Jun 11, 2026, 1:46 AM UTC

This is really interesting. Thanks for creating this.

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#45

Post by bduffany » Thu, Jun 11, 2026, 2:05 AM UTC

andrewlu0 wrote: post #41

pea wrote: post #38

Looks cool but your home page heavily lags on my mbp m3 pro - you should maybe be lazy loading vs loading all your components upfront

Valid feedback a few other comments have mentioned , I’m going to try improving the home page tomorrow

The performance of the "Layout blocks" component is particularly bad. It consumes tons of CPU when scrolling.

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#46

Post by andrewlu0 » Thu, Jun 11, 2026, 2:51 AM UTC

carlosjobim wrote: post #43

Excellent that you offer Miller columns, one of the best tools for computing and information browsing, and management. The world should run on Miller columns.

TIL those are called Miller columns !

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#47

Post by nhatcher » Thu, Jun 11, 2026, 4:03 AM UTC

andrewlu0 wrote: post #17

dvt wrote: post #15

Super cool. Working on a local AI tool specifically for document workflow automation (where context = screen/web/folders/files), and this could come in super useful. I do most of the PDF/DOCX/etc. parsing natively in Rust, but having a nice way to see the output without spinning up Word or Powerpoint is a huge leap. Thanks for releasing publicly.

nice - did you write a custom parser for PDF/DOCX? we wrote one for XLSX after running into event loop issues with sheet JS

First of all thanks for the great library. It is so much more thay an UI kit!

We wrote (should say are writing) our own xlsx parser in Rust on IronCalc:

https://github.com/ironcalc/IronCalc/tree/main/xlsx

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#48

Post by daohieu91 » Thu, Jun 11, 2026, 4:11 AM UTC

[dead]

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#49

Post by mklifelife » Thu, Jun 11, 2026, 4:50 AM UTC

Looks great.

I'm curious whether the primary users are AI-native document products or more traditional SaaS applications.

The document-app niche feels increasingly important with the rise of AI workflows.

Re: Show HN: Extend UI – open-source UI kit for modern document apps

#50

Post by rolls-reus » Thu, Jun 11, 2026, 6:07 AM UTC

Mind sharing a link to the source code? i couldn’t find it on the website.