# daumann/ECMAScript-new-features-list

A comprehensive list of new ES features, including ES2015 (ES6), ES2016, ES2017, ES2018, ES2019

Repository: https://github.com/daumann/ECMAScript-new-features-list
Canonical: https://ross.abutalabs.com/products/ecmascript-new-features-list
License: MIT
License Family: permissive
Topics: es5, es6, es7, es8, es9, es10, ecmascript, features, es2015, es2016, es2017, es2018, esnext, javascript, es2019, es2020, es2022, es2023, es2024
Last push: 2024-07-21T19:59:46+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2562, "days_push": 773, "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 3446, forks 516 (observed 2026-08-28T04:08:05.197359+00:00)

## What it is
A curated reference repository listing new ECMAScript (JavaScript) language features from ES2015 through ES2023, with code examples for each feature. It serves as a quick lookup guide for developers learning what each ES version introduced.

## Use cases
- look up what new features ES2020 introduced
- find code examples for ES6 features like arrow functions and destructuring
- catch up on JavaScript language changes since ES5
- prepare for a JavaScript interview covering modern syntax
- check which ES version added a specific language feature

## When to choose
- you need a quick, example-driven overview of ECMAScript features by version
- you are learning modern JavaScript and want a concise feature reference

## When to avoid
- you need official normative language specification details (use the TC39 spec)
- you need runtime/browser compatibility data (use the compat-table instead)

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation
- domain: programming-languages, tutorials, web-development, developer-tools
- platform: cross-platform
- tags: javascript, ecmascript, es6, es2015, es2023, feature-list, reference, cheatsheet

## Member repositories
- daumann/ECMAScript-new-features-list (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:05.197359+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 2026-08-29T18:37:36.683847+00:00, confidence not recorded.
  - readme: https://github.com/daumann/ECMAScript-new-features-list (fetched 2026-08-28T04:08:05.197359+00:00, sha 70cd70adc549)
- Data as of 2026-08-30T08:39:29.467469+00:00.