2025-09-13

• added JSON modules and import attributes
• added JS_PrintValue() API
• qjs: pretty print objects in print() and console.log()
• qjs: better promise rejection tracker heuristics
• added RegExp v flag
• added RegExp modifiers
• added RegExp.escape
• added Float16Array
• added Promise.try
• improved JSON parser spec conformance
• qjs: improved compatibility of std.parseExtJSON() with JSON5 and
  accept JSON5 modules
• added JS_FreePropertyEnum() and JS_AtomToCStringLen() API
• added Error.isError()
• misc bug fixes

2025-04-26

• removed the bignum extensions and qjscalc
• new BigInt implementation optimized for small numbers
• added WeakRef, FinalizationRegistry and symbols as weakrefs
• added builtin float64 printing and parsing functions for more correctness
• faster repeated string concatenation
• qjs: promise unhandled rejections are fatal errors by default
• added column number in debug information
• removed the "use strip" extension
• qjs: added -s and --strip-source options
• qjsc: added -s and --keep-source options
• added JS_GetAnyOpaque()
• added more callbacks for exotic objects in JSClassExoticMethods
• misc bug fixes

2024-01-13

• top-level-await support in modules
• allow 'await' in the REPL
• added Array.prototype.{with,toReversed,toSpliced,toSorted} and
  TypedArray.prototype.{with,toReversed,toSorted}
• added String.prototype.isWellFormed and String.prototype.toWellFormed
• added Object.groupBy and Map.groupBy
• added Promise.withResolvers
• class static block
• 'in' operator support for private fields
• optional chaining fixes
• added RegExp 'd' flag
• fixed RegExp zero length match logic
• fixed RegExp case insensitive flag
• added os.getpid() and os.now()
• added cosmopolitan build
• misc bug fixes

2023-12-09

• added Object.hasOwn, {String|Array|TypedArray}.prototype.at,
  {Array|TypedArray}.prototype.findLast{Index}
• BigInt support is enabled even if CONFIG_BIGNUM disabled
• updated to Unicode 15.0.0
• misc bug fixes

2021-03-27

• faster Array.prototype.push and Array.prototype.unshift
• added JS_UpdateStackTop()
• fixed Windows console
• misc bug fixes

2020-11-08

• improved function parameter initializers
• added std.setenv(), std.unsetenv() and std.getenviron()
• added JS_EvalThis()
• misc bug fixes

2020-09-06

• added logical assignment operators
• added IsHTMLDDA support
• faster for-of loops
• os.Worker now takes a module filename as parameter
• qjsc: added -D option to compile dynamically loaded modules or workers
• misc bug fixes

2020-07-05

• modified JS_GetPrototype() to return a live value
• REPL: support unicode characters larger than 16 bits
• added os.Worker
• improved object serialization
• added std.parseExtJSON
• misc bug fixes

2020-04-12

• added cross realm support
• added AggregateError and Promise.any
• added env, uid and gid options in os.exec()
• misc bug fixes

---

• libquickjs.dll had been moved into quickjs-***-all.zip

2020-03-16

• reworked error handling in std and os libraries: suppressed I/O
  exceptions in std FILE functions and return a positive errno value
  when it is explicit
• output exception messages to stderr
• added std.loadFile(), std.strerror(), std.FILE.prototype.tello()
• added JS_GetRuntimeOpaque(), JS_SetRuntimeOpaque(), JS_NewUint32()
• updated to Unicode 13.0.0
• misc bug fixes

---

• libquickjs.dll had been moved into quickjs-***-all.zip