leonardomso/33-js-concepts resource
📜 33 JavaScript concepts every developer should know. observed · 2026-08-28
Health v2 · maintenance only
75/100
- Activity 95
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 2920
- days_rel: n/a
- days_push: 31
- n_releases_24m: 0
Adoption not part of the score
66516 stars · 9137 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
A curated learning guide covering 33 core JavaScript concepts (plus 29 advanced ones) with explanations, code examples, diagrams, and links to articles, videos, and books. It originated as a popular GitHub repository and now also lives as a full documentation website.
Use cases
- learn javascript fundamentals from scratch
- prepare for javascript technical interviews
- understand closures and the event loop
- fill knowledge gaps as a self-taught developer
- find curated resources for javascript concepts
- learn modern es6+ javascript syntax
- study javascript concepts in a structured learning path
When to choose
- you want a structured, free path to deeply understand JavaScript rather than just syntax
- you are preparing for technical interviews and need core concepts cold
- you are a beginner or self-taught developer wanting curated articles, videos, and examples per topic
When to avoid
- you need a runnable library, framework, or tool rather than learning material
- you want framework-specific tutorials like React or Angular internals
- you prefer interactive courses with graded exercises over reading and self-practice
Facets
learning-resource · maturity active
documentation developer-tools programming-languages tutorials web-development education browser cross-platform javascript learning-guide es6 interview-prep curated-resources awesome-list
8 sources
- readme: https://github.com/leonardomso/33-js-concepts · fetched 2026-08-28 · 87dd16e2b0f5
- homepage: https://33jsconcepts.com/ · fetched 2026-08-28 · 367af963fe19
- site_page: https://33jsconcepts.com/getting-started/about · fetched 2026-08-28 · ee303bbe478a
- site_page: https://33jsconcepts.com/getting-started/how-to-learn · fetched 2026-08-28 · 7be084dfec2c
- site_page: https://33jsconcepts.com/getting-started/prerequisites · fetched 2026-08-28 · b3dfadc14267
- site_page: https://33jsconcepts.com/getting-started/learning-paths · fetched 2026-08-28 · de2a1f96ffce
- site_page: https://33jsconcepts.com/beyond/getting-started/overview · fetched 2026-08-28 · 16c50aaf8a9a
- site_page: https://33jsconcepts.com/concepts/modern-js-syntax · fetched 2026-08-28 · acc0acf23700
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| leonardomso/33-js-concepts | main | 75 |
For agents
markdown · JSON · MCP: product_card(name="leonardomso/33-js-concepts")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem