The JerryScript team proudly announces JerryScript 3.0.0 release.

A short list of changes/improvements:

• 343 commits by 41 authors since JerryScript 2.4.0 release
• 84% conformance on Test262 ES2020
• Kangax 2016+ (ES2025) coverage improved from 45% to 70% (Kangax Compatibilty Table)
• Binary size increased due to the implementation of a lot of new language features
• Fixed several bugs including security issues
• New language feature:
  • Dynamic Import
  • Instance class fields
  • Logical Assignment (&&=, ||=, ??=)
  • Native Module
  • Optional chaining (?.)
  • Private class method
  • Static class fields
  • Static initialization block
• Supported new builtin methods:
  • Atomics
  • function.toString operation
  • Object.hasOwn
  • Partial support for WeakReferences
  • Promise.allSettled and Promise.Any
  • SharedArrayBuffer
• API rework
  • Resolved inconsistencies in APIs.
  • Adopted a unified naming scheme (Issue #4186).
• Better windows support
• Enhanced Python 3 compatibility
  • Dropped Python2 support due to its end of life
• Updated and improved documentation

The JerryScript team proudly announces JerryScript 2.4.0 release.

A short list of changes/improvements:

• Change the default profile to ES.next
• Improve module and proxy support
• Added support for Realms
• Added support for BigInts
• Enhanced build and testing on Windows
• Replaces all-in-one build with amalgam build
• Introduced new port API function: jerry_port_track_promise_rejection
• New language features:
  • Async function
  • BigInt syntax
  • Class fields
  • Catch without argument
  • Comma after last argument
  • For-await-of
  • Nullish coalescing
  • Numeric separator
  • Rest operator in object destructuring patterns
  • Spread operator in object literal
  • Super keyword in object methods
  • Unicode supplementary planes
• Supported new builtin methods:
  • Array.prototype.flat, flatMap
  • DataView.prototype.getBigInt64, getBigUint64, setBigInt64, setBigUint64
  • Global.globalThis
  • Object.entries, getOwnPropertyDescriptors, values
  • Object.prototype.__defineGetter__, __defineSetter__, __lookupGetter__, __lookupSetter__, fromEntries
  • Promise.prototype.finally
  • RegExp.dotAll
  • String.prototype.padStart, padEnd, replaceAll, trimStart, trimEnd
  • Symbol.matchAll
  • Symbol.prototype.description
  • TypedArray.prototype.includes
• 80% conformance on Test262 ES2020
• Kangax ES2016+ coverage improved to 75%
• 413 commit by 22 authors since JerryScript 2.3.0

The JerryScript team proudly announces JerryScript 2.3.0 release.

A short list of changes/improvements:

• Improved ES6 (ES2015) support
  • Kangax ES2015 coverage improved from 81% to 95%
  • Some notable new features:
    • Added Proxy support
    • Exponentiation operator (**)
    • Math builtin functions
    • Function name support
• Improved RegExp engine
  • Added full support for Web Compatibility syntax
  • 1.37x better score on Octane/RegExp benchmark
  • ~50% smaller bytecode size
  • ~10% stack usage reduction
• 208 commits by 16 authors since JerryScript 2.2.0

The JerryScript team proudly announces JerryScript 2.2.0 release.

A short list of changes/improvements:

• Improved ES6 (ES2015) support
  • Kangax ES2015 coverage improved from 34% to 81%
  • Some notable new features:
    • Spread syntax for iterable objects
    • Array and object destructuring
    • Lexical block scoping (let)
    • Generators
    • Well-known symbols
• General performance and memory improvements (ARMv7 RPi2)
  • Significant speed-up in match, search, split and replace operations with Strings and RegExps
  • Significant improvements in garbage collection when having deeply nested objects
  • Improved prototype lookup for primitive values
  • Optimized array built-in methods for non-sparse arrays
  • Small overall stack usage improvement
• Added new API functions
• Revised a few feature guards that can be used in profiles
• Enabled the usage of API functions in native free callbacks
• Improved RegExp compatibility with web browsers
• 231 commits by 18 authors since JerryScript 2.1.0

The developer team is proud to announce the release of JerryScript version 2.1.0.

With this release we introduce semantic versioning (#3104).

A short list of changes/improvements

• General performance and memory improvements (ARMv7 RPi2)
  • ~20% speedup on SunSpider
  • ~15% speedup on V8 Benchmark Suite
  • ~15-20% speedup on TypedArray access
  • ~10-20x speedup on JSON microbenchmarks
  • ~10% heap gain on SunSpider
• No breaking API change (since JerryScript 2.0)
• Added a new port API function: jerry_port_get_native_module
• Added a subset of ES6 (ES2015) features
  • Number.isInteger, isSafeInteger, isFinite, isNan
  • TypedArray.prototype.indexOf, lastIndexOf, toLocaleString, copyWithin
• Added a tool to transpile not yet supported features using Babel (experimental)
• Improved string handling internally
• Improved Windows support
• A few statistics (since JerryScript 2.0):
  • 138 commits by 13 authors
  • 50 fixed issues

The developer team is proud to announce the release of JerryScript version 2.0

A short list of changes/improvements

• General performance and memory improvements (on ARM RPI3 ~18% speedup and memory usage reduction)
• Binary code size reduction (on ARM RPI3 ~24 kB binary size reduction with ES5.1 profile)
• Minimal API breaking changes (see Migration guide)
• Added new API functions (see API reference document)
• Added debugger support
• Created extension library which includes common use-cases, utility functions
• Added a subset of ES6 (ES2015) features:
  • Arrow functions
  • Class support
  • Module support
  • Rest parameters and enhanced object initializer support
  • Template strings
  • For-of support
  • Symbols
  • Promises
  • Map/Set/Iterator built-ins
  • TypedArray/ArrayBuffer/DataView built-ins
• New experimental target platforms:
  • OpenWrt, Particle, and Windows
• A few statistics (since JerryScript 1.0):
  • 1000+ commits by 73+ authors
  • 1000+ merged Pull requests

This is the first stable release of JerryScript!

Officially supported platforms:

• x86-32, x86-64 and ARMv7 Linux
• NuttX on STM32F4
• RIOT on STM32F4
• Zephyr on Arduino 101 and FRDM-K64F
• mbed OS 3.0 on FRDM-K64F, STM32F4, STM32F429ZI, F401RE
• Curie BSP on Arduino 101

Experimental support for:

• ESP8266