# mbeaudru/modern-js-cheatsheet

Cheatsheet for the JavaScript knowledge you will frequently encounter in modern projects.

Repository: https://github.com/mbeaudru/modern-js-cheatsheet
Canonical: https://ross.abutalabs.com/products/modern-js-cheatsheet
Homepage: https://mbeaudru.github.io/modern-js-cheatsheet/
License: MIT
License Family: permissive
Topics: javascript, es6
Last push: 2024-10-15T14:33:12+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3271, "days_push": 687, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 25612, forks 3148 (observed 2026-08-28T04:11:38.350878+00:00)

## What it is
A community-maintained cheatsheet documenting modern JavaScript concepts frequently encountered in contemporary codebases, focusing on ES2015+ features like arrow functions, destructuring, and array methods. It is aimed at developers with basic JavaScript knowledge who need to get up to speed with modern syntax and patterns.

## Use cases
- learn modern javascript syntax for es6 features
- understand arrow functions and this binding
- quick reference for destructuring objects and arrays
- brush up on map filter reduce array methods
- get familiar with modern codebases before learning react
- review var let const differences

## When to choose
- you already know basic JavaScript and need a refresher on ES6+ syntax
- you want a concise reference rather than a full tutorial
- you are transitioning from older JavaScript to modern codebases

## When to avoid
- you are a complete beginner learning JavaScript from scratch
- you need exhaustive language documentation or spec-level detail
- you need an interactive course with exercises

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: documentation, developer-tools
- domain: web-development, programming-languages, tutorials, developer-tools
- platform: cross-platform
- tags: javascript, es6, cheatsheet, reference-guide, es2015

## Member repositories
- mbeaudru/modern-js-cheatsheet (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:38.350878+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:56:01.483692+00:00, confidence not recorded.
  - readme: https://github.com/mbeaudru/modern-js-cheatsheet (fetched 2026-08-28T04:11:38.350878+00:00, sha bea2308293a7)
  - homepage: https://mbeaudru.github.io/modern-js-cheatsheet/ (fetched 2026-08-29T07:53:05.655332+00:00, sha 02380f65d70a)
- Data as of 2026-08-30T08:39:29.467469+00:00.