NAnarilear·Jun 23, 2025Submission
30-seconds-of-code – short, reusable JavaScript code snippets
3 points · Open discussionChalarangelo
30-seconds-of-code
JavaScript2017–2025
Chalarangelo / 30-seconds-of-code
30-seconds-of-code
Coding articles to level up your development skills
17Distinct people
17Mentions
0Explicit recommenders
129.5KGitHub stars
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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, 3:56:07 PM UTC.
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Mentions over time
HN mentions by year17 dated mentions
Observed mentions: 2017-12-11 18:13:04 UTC to 2025-06-23 07:09:47 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 |
|---|---|---|---|---|---|
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 6 | 3 | 3 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 4 | 4 | 0 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 3 | 3 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 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 | 1 | 1 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 1 | 1 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 1 | 0 |
What Hacker News says
17 sources30-seconds-of-code: Short code snippets for all your development needs
4 points · Open discussionSeconds of code – short JavaScript snippets for all your development needs
1 points · Open discussionSometimes there's an important link in Github project description
example: https://github.com/30-seconds/30-seconds-of-code -> https://www.30secondsofcode.org/js/p/1, but project-awesome is missing it https://project-awesome.org/30-seconds/30-seconds-of-code
In Curated List of ListsSeconds of code: JavaScript snippets you can understand in 30 seconds or less
2 points · Open discussionThirty Seconds of Code Acquires Python, PHP and Angular
2 points · Open discussionJavaScript snippets that you can understand in 30 seconds or less
2 points · Open discussion30 seconds of code: JavaScript snippets that you can understand in 30s or less
2 points · Open discussion30-seconds-of-code: JavaScript Snippets you can understand in 30 seconds
1 points · Open discussionUseful JavaScript snippets that you can understand in 30 seconds or less
2 points · Open discussionCollection of useful JS snippets that you can understand in 30 seconds or less
3 points · Open discussion30-seconds-of-code: Collection of useful JavaScript snippets to understand in 30 seconds
3 points · Open discussionNote that not all of this code is performant.
The Difference Between Arrays[1] snippet is O(n^2), but you could make it much more performant for many data types.
[1] https://github.com/Chalarangelo/30-seconds-of-code#differenc...
In 30 seconds of code: Curated list of useful JavaScript snippetsBesides the "Hey I can write stuff you can't read" factor, what's the point of the array and scientific notation here for the UUID generator[1]?
var uuid = _ =>
( [1e7]+-1e3+-4e3+-8e3+-1e11 ).replace( /[018]/g, c =>
(c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16)
)
The first piece evaluates to the static string '10000000-1000-4000-8000-100000000000'. Writing it using the array toString and scientific notation saves 8 bytes (or 10 if you remove the other whitespace) but is otherwise pointless.
It'd be even better to use '00000000-0000-4000-0000-000000000000' as the "1" and "8" values aren't special. That would let you replace the /[018]/ with just /0/ too.
[1]: https://github.com/Chalarangelo/30-seconds-of-code/blob/mast...
In 30 seconds of code: Curated list of useful JavaScript snippetsShowing the 15 most recent of 17 sources. Enable JavaScript to search and browse every indexed mention.