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Pretext Alternatives
Similar projects and alternatives to pretext
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SaaSHub
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LiX
Compose papers, dissertations, textbooks, novels, newspapers etc. quicker using abstractions to the standard LaTeX document classes - or create your own classes easily. (by NicklasVraa)
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sicp
XML sources of SICP and SICP JS, and support for generating Interactive SICP JS, PDF, e-book and comparison editions (by source-academy)
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adapt_authoring
A server-based user interface for authoring eLearning courses using the Adapt framework.
pretext discussion
pretext reviews and mentions
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Code Is Cheap Now, and That Changes Everything
AI is assisting you. It'll write efficient code if you guide it to write efficient code. You're not a hapless victim of ai written code.
To give you a concrete examples. Recently pretext library made waves. I looked at the code and noticed that isCJK could possibly faster.
So I spent 30 minutes TELLING claude to write a benchmark and implement several different, hopefully faster, versions. Some claude came up with by itself and some were based on my guidance.
You can see the result here: https://github.com/chenglou/pretext/issues/2
The original isCJK, also written by AI (I assume), was fast. It wasn't obviously slow like lots of human JavaScript code I see.
Claude did implement a faster version.
Could I do the same thing (write multiple implementations and benchmark them) without Claude? Yes.
Would I do it? Probably not. It would take significantly longer than 30 min. and I don't have that much time to spend on isCJK.
Would I achieve as good result? Probably no. The big win came from replacing for .. of with regular for loop. Something that didn't occur to me but Claude did it because I instructed it to "come up with ideas to speed it up". I'm an expert in writing fast code but I don't know everything and I all good ideas. AI knows everything, you just need to poke it the right way.
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I Built an AI Presentation Generator Using React Streaming — Here's What Actually Works
Enter Pretext, a library from Cheng Lou (React core team, creator of react-motion). Pretext calculates text dimensions without touching the DOM by:
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Claude Code Buddy Creator
I extracted the /buddy generator from the claude code source code leak. I will probably update some things once the official release is completed tomorrow. But until then, you can use the site to see all the potential buddies.
Uses pretext (https://github.com/chenglou/pretext) for the text layout
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Accessible Pretext demo
I took the demo for a editorial engine built with pretext by Cheng Lou and I made my own demo fully accessible, with semantic HTML structure, keyboard operability, screen reader support, and prefers-reduced-motion compliance. The result is a high-performance text layout demo that meets WCAG 2.2 success criteria while not compromising aesthetics and performance. The orbs are still draggable with the mouse but I also added the possibility of moving them using the keyboard.
- Pretext.js: Thư Viện 15KB Tối Ưu Bố Cục Văn Bản Nhanh Gấp 500 Lần
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You're Looking at the Wrong Pretext Demo
Pretext, a new JavaScript library from Cheng Lou, crossed 7,000 GitHub stars in its first three days. If you've been anywhere near the frontend engineering circles in that time, you've seen the demos: a dragon that parts text like water, fluid smoke rendered as typographic ASCII, a wireframe torus drawn through a character grid, multi-column editorial layouts with animated orbs displacing text at 60fps. These are visually stunning and they're why the library went viral.
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Pretext
i wrote something similar for this purpose, but much simpler and in 2kb, without AI, about a year ago.
https://news.ycombinator.com/item?id=43583478
for ASCII text, mine finishes in 80ms, and pretext takes 2200ms.
let's see how close they can get without adopting my algorithm / caching strategy.
https://github.com/chenglou/pretext/issues/18
- Pretext: JavaScript/TypeScript library for multiline text measurement and layout
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A note from our sponsor - SaaSHub
www.saashub.com | 16 Jun 2026
Stats
chenglou/pretext is an open source project licensed under MIT License which is an OSI approved license.
The primary programming language of pretext is TypeScript.