pretext

15KB zero-dependency TypeScript library for fast, accurate text measurement & layout — 500x faster than DOM methods (by chenglou)

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NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better pretext alternative or higher similarity.

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pretext reviews and mentions

Posts with mentions or reviews of pretext. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2026-03-28.
  • Code Is Cheap Now, and That Changes Everything
    1 project | news.ycombinator.com | 9 Apr 2026
    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.

  • I Built an AI Presentation Generator Using React Streaming — Here's What Actually Works
    1 project | dev.to | 5 Apr 2026
    Enter Pretext, a library from Cheng Lou (React core team, creator of react-motion). Pretext calculates text dimensions without touching the DOM by:
  • Claude Code Buddy Creator
    1 project | news.ycombinator.com | 31 Mar 2026
    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

  • Accessible Pretext demo
    1 project | dev.to | 31 Mar 2026
    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
    1 project | dev.to | 31 Mar 2026
  • You're Looking at the Wrong Pretext Demo
    1 project | dev.to | 30 Mar 2026
    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.
  • Pretext
    1 project | news.ycombinator.com | 29 Mar 2026
    7 projects | news.ycombinator.com | 28 Mar 2026
    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
    1 project | news.ycombinator.com | 27 Mar 2026
  • A note from our sponsor - SaaSHub
    www.saashub.com | 16 Jun 2026
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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.


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