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chalarangelo/30-seconds-of-code

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TLDR

A curated collection of short coding articles and snippets across JavaScript, CSS, HTML, and Git to help developers level up their skills quickly.

Mindmap

mindmap
  root((repo))
    What it does
      Short coding articles
      Code snippets
      Explanations and examples
    Topics covered
      JavaScript
      CSS and HTML
      Git basics
    How to use it
      Browse by collection
      Search by tag
      Filter by language
    Tech stack
      Astro
      Netlify
      GitHub

Things people build with this

USE CASE 1

Learn JavaScript, CSS, and HTML patterns through short, focused code examples.

USE CASE 2

Search for quick solutions to common coding problems across multiple languages.

USE CASE 3

Build a personal reference library by bookmarking snippets you use frequently.

Tech stack

JavaScriptAstroNetlifyGitHub

Getting it running

Difficulty · easy Time to first run · 5min
Use freely for any purpose, including commercial use, as long as you give credit to the original author.

In plain English

This repository backs a learning website called 30 seconds of code, described in the README as coding articles to level up your development skills. The README directs readers to the project's website, where the articles are organized into collections and snippets that you can browse or search by name, tag, language, or description, with each card opening into a full article that includes code snippets, an explanation, and examples. Topics listed for the repo cover JavaScript, CSS, HTML, Git, and a few related themes. New content contributions are no longer accepted, but you can open an issue to report site problems. The README notes the project is maintained by Angelos Chalaris, the snippets are under a CC-BY-4.0 license, and the website is powered by Netlify, Astro, and GitHub.

Copy-paste prompts

Prompt 1
Show me a JavaScript snippet from 30-seconds-of-code that demonstrates array manipulation with examples.
Prompt 2
Find a CSS trick from 30-seconds-of-code that solves a common layout problem and explain how it works.
Prompt 3
Give me a Git command snippet from 30-seconds-of-code with a real-world use case.
Prompt 4
How would I contribute a new coding snippet to 30-seconds-of-code if the project accepted submissions?
Open on GitHub → Explain another repo

Generated 2026-05-18 · Model: sonnet-4-6 · Verify against the repo before relying on details.