SHshakna·Jul 6, 2025
If you include the user clicking, then it already is. [0]
[0] https://github.com/brandondong/css-turing-machine
In Show HN: I made Logic gates using CSS if() functionbrandondong
css-turing-machine
JavaScript2021–2025
brandondong / css-turing-machine
css-turing-machine
Turing machines implemented in CSS
8Distinct people
8Mentions
0Explicit recommenders
84GitHub stars
What to know before exploring
What it is
Turing machines implemented in CSS
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:03:16 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year8 dated mentions
Observed mentions: 2021-01-15 00:18:43 UTC to 2025-07-06 13:09:36 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 3 | 1 | 2 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 2 | 1 | 1 |
What Hacker News says
8 sourcesShow HN: Turing Completeness of CSS Demo
Rule 110 demos already exist but I think Turing machines are more fun! Explanation of how it works: https://github.com/brandondong/css-turing-machine/blob/maste...
(I actually made this a few years ago but the approach was flawed. Only recently got around to rewriting it.)
1 points · Open discussion> Technically html + css + user interaction can be turing complete: https://github.com/brandondong/css-turing-machine
Turing completeness is about what computations can be expressed, not what user interactions can be performed. The lambda calculus is Turing complete, but, if I whip up a lambda calculus interpreter and don't give it a print statement, then you'll never know anything about the computations it's performing.
In Add Depth of Field to ScreenshotsI hope someone takes this as a challenge.
Technically html + css + user interaction can be turing complete: https://github.com/brandondong/css-turing-machine
In Add Depth of Field to ScreenshotsTuring Machine Implemented in CSS
2 points · Open discussion> This reminds me of the time I removed tyres from my car’s wheels. I want the predictability of my horse drawn cart back. A wheel breaks, I just take a hammer and some nails to it. Galvanised rubber and metallurgy is something I don’t understand so it must be bad.
I understand CSS and I've done a fair bit of webdesign myself. CSS has evolved to the point where it can be used abusively. Hell, some consider it turing complete (https://github.com/brandondong/css-turing-machine).
CSS can be used for ads, fingerprinting, and exploits. There are perfectly valid reasons for wanting a little less functionality while still allowing for some basic styling.
I mean, it's cool that there are computer games written in pure CSS and other neat tricks, but sometimes you just want a browser to behave itself even in hostile spaces. If that makes my heavily
Read the rest
locked down browser a "horse drawn cart" I'm happy to trot forward.
It's a React.js "SPA"[0] that generates a "data:" URI containing the entire "machine". When visiting that, there's no JavaScript.
[0]: https://github.com/brandondong/css-turing-machine
In CSS Turing Machine