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CHANGELOG

v0.21.0 (2025-10-21)

Feature Enhancements

  • Build out Temporal's ZonedDateTime and Now by @nekevss in boa-dev#4068
  • Add valueOf methods to the Temporal builtins by @nekevss in boa-dev#4079
  • Add more ZonedDateTime method implementations by @nekevss in boa-dev#4095
  • Cleanup CLI to use eyre + refactor patterns by @jedel1043 in boa-dev#4108
  • Move methods of JsString to JsStr by @jedel1043 in boa-dev#4106
  • Implement Error.isError by @jedel1043 in boa-dev#4114
  • Improve implementation of example JobQueues by @jedel1043 in boa-dev#4111
  • Implement PlainDate string methods by @nekevss in boa-dev#4119
  • Revamp JobQueue into JobExecutor and introduce NativeAsyncJob by @jedel1043 in boa-dev#4118
  • Add From<Cow<'a, str>> for JsString by @CrazyboyQCD in boa-dev#4134
  • Implement more toString and toJSON methods on Temporal builtins by @nekevss in boa-dev#4126
  • Implement Array.fromAsync by @jedel1043 in boa-dev#4115
  • Implement toString and toJSON methods for the remaining builtins Duration, PlainMonthDay, and PlainYearMonth by @nekevss in boa-dev#4135
  • Bump temporal_rs and fix instant return by @nekevss in boa-dev#4142
  • Implement toLocaleString and some general cleanup by @nekevss in boa-dev#4156
  • add macos arm64 by @ahaoboy in boa-dev#4160
  • Use NaN-boxing on value::InnerValue by @hansl in boa-dev#4091
  • Split Tagged<T> into a utility crate by @HalidOdat in boa-dev#3849
  • Update JsValue::to_json to support undefined by @jamesthurley in boa-dev#4212
  • Change signature of from_async_fn to allow capturing the context by @jedel1043 in boa-dev#4215
  • Implement Set methods from ECMAScript Specification Features/#4128 by @Hemenguelbindi in boa-dev#4145
  • Add a #[boa_module] macro to automatically implement a Module by @hansl in boa-dev#4277
  • Implement small changes from Intl's 2026 spec by @jedel1043 in boa-dev#4290
  • Bump rustc edition to 2024 and version to 1.88 by @jedel1043 in boa-dev#4315
  • Implement backtrace information for errors by @HalidOdat in boa-dev#4292
  • Add WPT as optional tests for boa_runtime by @hansl in boa-dev#4008
  • Simplify SourcePositionGuard creation by @hansl in boa-dev#4327
  • Make JobExecutor::run_jobs_async a plain async method by @jedel1043 in boa-dev#4331
  • Introduce async ModuleLoaders by @jedel1043 in boa-dev#4328
  • Use AsyncFnOnce in constructors of NativeAsyncJob by @jedel1043 in boa-dev#4333
  • Add (optionally) Float16Array and f16round() support and add JsUint8ClampedArray by @hansl in boa-dev#4364
  • Implement Atomics.waitAsync by @jedel1043 in boa-dev#4339
  • Implement Math.sumPrecise by @nekevss in boa-dev#4383
  • Add Date.prototype.toTemporalInstant from the Temporal proposal by @nekevss in boa-dev#4382
  • Implement upsert methods for Map by @jasonmilad in boa-dev#4436
  • Change JsObject default method to take Instrinsics parameter by @mdrokz in boa-dev#4466
  • Cleanup BuiltInConstructor constants to ensure no additional allocations by @jedel1043 in boa-dev#4464
  • Implement Upsert methods for weakMap: getOrInsert and getOrInsertComputed by @rrogerc in boa-dev#4459

Bug Fixes

  • Fix #4051, parse Arguments should expect ) not } by @zzzdong in boa-dev#4058
  • bug fix: ops that stay strictly at the EOF after assigns ops are ignored by @Nikita-str in boa-dev#4047
  • Patch Temporal.PlainTime and Temporal.Duration constructors by @nekevss in boa-dev#4078
  • Fix bugs on ephemeron and TypedArray.prototype.slice by @jedel1043 in boa-dev#4107
  • Allow bool and null literals in export aliases by @jedel1043 in boa-dev#4113
  • Allow referencing super within initializer of static private property by @jedel1043 in boa-dev#4121
  • Fix truncation on max microseconds and nanoseconds by @nekevss in boa-dev#4139
  • Fix issues with to_temporal_time and ZonedDateTime.prototype.withPlainTime by @nekevss in boa-dev#4154
  • Some cleanup + order of operations fixes by @nekevss in boa-dev#4190
  • Fix JsValue::to_json with cyclic values by @changhc in boa-dev#4176
  • Fixed logo in documentation by @Razican in boa-dev#4208
  • Enable wasm_js feature of getrandom in boa_engine crate by @HalidOdat in boa-dev#4241
  • Fix panics on staging TypedArray.slice tests by @jedel1043 in boa-dev#4289
  • Add the legacy enum-based JsValue implementation behind a flag by @hansl in boa-dev#4281
  • Allow non-reserved keywords to be used as identifiers by @cijiugechu in boa-dev#4307
  • Avoid fully awaiting futures in async event loops by @jedel1043 in boa-dev#4332
  • Prevent evalutation of code with --dump-ast flag by @HalidOdat in boa-dev#4337
  • Some general bug fixes for Temporal implementation by @nekevss in boa-dev#4349
  • Fix UB in implementation of NanBoxedValue by @jedel1043 in boa-dev#4346
  • fix(regexp): fix the capture group count assert to have the correct upper limit by @BDeuDev in boa-dev#4419
  • Fix contains_direct_eval for ordinary function by @hpp2334 in boa-dev#4453
  • Fix test262 comments on new PR by @jedel1043 in boa-dev#4465

Internal Improvements

  • Remove try_break macro in favour of question mark operator by @jedel1043 in boa-dev#4112
  • Use cow-utils instead by @heygsc in boa-dev#4133
  • Register VM by @HalidOdat in boa-dev#3798
  • Bump MSRV to 1.84 by @jedel1043 in boa-dev#4165
  • Avoid unnecessary calls of to_string in cow_* by @CrazyboyQCD in boa-dev#4166
  • Apply rustc 1.85 lints by @jedel1043 in boa-dev#4170
  • Some string cleanups by @CrazyboyQCD in boa-dev#4090
  • Refactor bytecode representation by @raskad in boa-dev#4220
  • Refactor registers to use the stack by @raskad in boa-dev#4263
  • Bump Test262 hash commit and cleanup test features by @jedel1043 in boa-dev#4288
  • Replace inner Gc<T> with Rc<T> for SourceText by @HalidOdat in boa-dev#4293
  • Fix more Intl tests for latest ECMA402 spec by @jedel1043 in boa-dev#4304
  • Fix lints for rustc 1.88 by @jedel1043 in boa-dev#4309
  • Migrate temporal_rs from 0.0.9 to 0.0.10 by @HalidOdat in boa-dev#4318
  • Mark the error path in Call::operation as cold. by @cijiugechu in boa-dev#4319
  • Add arm64 linux nightly build by @nekevss in boa-dev#4321
  • extract small_map as separate utility crate by @countradooku in boa-dev#4214
  • Remove Box<T> from JsValue for JsString by @HalidOdat in boa-dev#4329
  • Add repr(C) on Object to prevent field reordering by @HalidOdat in boa-dev#4343
  • Fix clippy lints for Rust 1.89 by @nekevss in boa-dev#4368
  • Add Nix flake by @xubaiwang in boa-dev#4381
  • Apply clippy fixes for Rust 1.90 by @hansl in boa-dev#4423
  • Fix UB on unaligned ArrayBuffers by @jedel1043 in boa-dev#4427
  • Use same cache key for builds and tests by @jasonwilliams in boa-dev#4426

Other Changes

  • Bug fix: regex started with /= parsed as AssignDiv by @Nikita-str in boa-dev#4048
  • Add fast path for number to JsString conversion by @CrazyboyQCD in boa-dev#4054
  • Bump the rust-dependencies group with 3 updates by @dependabot[bot] in boa-dev#4069
  • Add fjcvtzs instruction for ARMv8.3 target by @CrazyboyQCD in boa-dev#4084
  • Add a stress test to the parser to parser multi-millions tokens by @hansl in boa-dev#4086
  • Bump the rust-dependencies group with 4 updates by @dependabot[bot] in boa-dev#4088
  • Privatize JsValue's internals and expose it through a JsVariant (with immutable reference) by @hansl in boa-dev#4080
  • Skip creation of arguments object if possible by @raskad in boa-dev#4087
  • Allow resizing of underlying ArrayBuffer from Rust by @hansl in boa-dev#4082
  • Add inline cache for getting bindings from the global object by @raskad in boa-dev#4067
  • Update Temporal ToIntegerIfIntegral, ToIntegerWithTruncation, and ToPositiveIntegerWithTruncation implementation by @nekevss in boa-dev#4081
  • Adjust call to correct method for PlainDateTime.prototype.since by @nekevss in boa-dev#4096
  • fix very minor typo shift -> unshift by @albertleigh in boa-dev#4097
  • Bump the temporal_rs version and related changes by @nekevss in boa-dev#4098
  • Bump test262 commit and changes to boa_tester to support sm changes by @nekevss in boa-dev#4099
  • Bump the rust-dependencies group across 1 directory with 6 updates by @dependabot[bot] in boa-dev#4103
  • Remove some clones and branches in hot PropertyDescriptor functions by @raskad in boa-dev#4104
  • Bump syn from 2.0.93 to 2.0.95 in the rust-dependencies group by @dependabot[bot] in boa-dev#4109
  • Fix CI with the latest linter errors introduced in 1.84 by @hansl in boa-dev#4117
  • Use cow_to_ascii_uppercase instead by @heygsc in boa-dev#4124
  • Bump the rust-dependencies group across 1 directory with 7 updates by @dependabot[bot] in boa-dev#4131
  • Set the array "length" property in [[DefineOwnProperty]] based on the array shape by @raskad in boa-dev#4101
  • Bump the rust-dependencies group with 5 updates by @dependabot[bot] in boa-dev#4137
  • Implement since and until methods for ZonedDateTime by @nekevss in boa-dev#4136
  • Bump baptiste0928/cargo-install from 3.1.1 to 3.3.0 in the ci-dependencies group by @dependabot[bot] in boa-dev#4138
  • Make the HostHooks shareable between app and context by @hansl in boa-dev#4141
  • Bump the rust-dependencies group across 1 directory with 3 updates by @dependabot[bot] in boa-dev#4148
  • Implement an internal time type and Clock trait by @hansl in boa-dev#4149
  • SourceText collection & toString() for fns and methods by @Nikita-str in boa-dev#4038
  • setTimeout, setInterval and clearInterval (and the same clearTimeout) implementations by @hansl in boa-dev#4130
  • Bump the rust-dependencies group with 3 updates by @dependabot[bot] in boa-dev#4151
  • Bump the rust-dependencies group with 5 updates by @dependabot[bot] in boa-dev#4157
  • Add trace function to Logger trait by @jamesthurley in boa-dev#4155
  • Allow local parameters if mapped arguments object is not used by @raskad in boa-dev#4092
  • Bump temporal_rs to Feb. 15 version + adjustments by @nekevss in boa-dev#4162
  • Bump the rust-dependencies group with 3 updates by @dependabot[bot] in boa-dev#4163
  • Add PlainDateTime.prototype.round implementation from temporal_rs by @nekevss in boa-dev#4164
  • Fix some engine specific bugs and bump version by @nekevss in boa-dev#4167
  • Simplify date parser by @CrazyboyQCD in boa-dev#4143
  • Build out remaining method stubs for temporal by @nekevss in boa-dev#4172
  • Bump the rust-dependencies group with 4 updates by @dependabot[bot] in boa-dev#4174
  • Prioritize drop of common types for nan-boxed JsValue by @HalidOdat in boa-dev#4178
  • Add changes from YearMonth parsing update and MonthCode addition by @nekevss in boa-dev#4173
  • implementation of static method compare for duration from temporal.rs by @lockels in boa-dev#4189
  • Unify release workflows by @HalidOdat in boa-dev#4192
  • Temporal bump and fixes by @nekevss in boa-dev#4193
  • Bump ring from 0.17.9 to 0.17.13 by @dependabot[bot] in boa-dev#4201
  • Bump the rust-dependencies group across 1 directory with 20 updates by @dependabot[bot] in boa-dev#4204
  • feat(examples): Add comprehensive JsPromise example by @created-by-varun in boa-dev#4198
  • Temporal bump and implementation of toPlainYearMonth and toPlainMonthDay by @lockels in boa-dev#4207
  • Bump the rust-dependencies group with 5 updates by @dependabot[bot] in boa-dev#4209
  • Bump the rust-dependencies group with 4 updates by @dependabot[bot] in boa-dev#4216
  • Fix Rust 1.86.0 lints and update dependencies by @raskad in boa-dev#4228
  • Move interop and module utilities from boa_interop into boa_engine by @hansl in boa-dev#4218
  • Bump the rust-dependencies group with 3 updates by @dependabot[bot] in boa-dev#4229
  • Temporal bump by @lockels in boa-dev#4231
  • Bump the rust-dependencies group with 2 updates by @dependabot[bot] in boa-dev#4232
  • Enable PlainDate.prototype.toZonedDateTime method by @nekevss in boa-dev#4233
  • PlainDateTime::toZonedDateTime & PlainDateTime::toPlainDate implementations by @nekevss in boa-dev#4234
  • Bump temporal_rs and add ZonedDateTime.prototype.round impl by @nekevss in boa-dev#4236
  • Bump the rust-dependencies group across 1 directory with 6 updates by @dependabot[bot] in boa-dev#4239
  • Bump the rust-dependencies group with 2 updates by @dependabot[bot] in boa-dev#4242
  • Bump temporal_rs and remove dead code by @nekevss in boa-dev#4248
  • Fix Rust 1.87.0 lints by @raskad in boa-dev#4249
  • Avoid range checks in nan-boxing by @raskad in boa-dev#4251
  • Update README.md to new version. by @tomoverlund in boa-dev#4254
  • Fix the Set methods to pass the 262 tests by @hansl in boa-dev#4260
  • Add support for LZ4 compression in embedded module loader by @hansl in boa-dev#4261
  • Bump the rust-dependencies group across 1 directory with 3 updates by @dependabot[bot] in boa-dev#4264
  • Fix AST contains operation by @HalidOdat in boa-dev#4267
  • Bump temporal_rs and fix some order of operation issues by @nekevss in boa-dev#4268
  • Escape analyze function scopes on non-arrow functions by @HalidOdat in boa-dev#4266
  • Remove local binding's initialized state in CallFrame by @HalidOdat in boa-dev#4269
  • Improve README.md by @HalidOdat in boa-dev#4270
  • Add a #[boa_class] proc macro attribute by @hansl in boa-dev#4271
  • Bump ICU4X to 2.0 by @jedel1043 in boa-dev#4274
  • Bump the rust-dependencies group with 2 updates by @dependabot[bot] in boa-dev#4278
  • Add Spans to expression nodes by @HalidOdat in boa-dev#4273
  • Bump the rust-dependencies group with 4 updates by @dependabot[bot] in boa-dev#4283
  • Bump temporal_rs to v0.0.9 by @nekevss in boa-dev#4285
  • remove boa_profiler and profiler calls. update docs. (#4272) by @Timkarx in boa-dev#4276
  • Add a #[boa(rename = ...)] attribute to TryFromJs and TryIntoJs derive macros by @hansl in boa-dev#4286
  • Add a js_value! macro to allow creation of JsValue from JSON-like DSL by @hansl in boa-dev#4282
  • Bump baptiste0928/cargo-install from 3.3.0 to 3.3.1 in the ci-dependencies group by @dependabot[bot] in boa-dev#4295
  • Bump the rust-dependencies group with 4 updates by @dependabot[bot] in boa-dev#4296
  • Update phf requirement from 0.11.2 to 0.12.1 in /tests/fuzz in the fuzz-dependencies group by @dependabot[bot] in boa-dev#4297
  • Fix JsValue::mul to handle zero times a negative integer by @Rafferty97 in boa-dev#4303
  • Move the URL class to using the boa_class macro by @hansl in boa-dev#4294
  • Hint branch predictor that surrogate pairs are rare by @cijiugechu in boa-dev#4312
  • cli: use mimalloc as global allocator on windows by @cijiugechu in boa-dev#4314
  • Refactor the Binding modifiers to use bitflags by @cijiugechu in boa-dev#4316
  • Implement type erased Gc<T> by @HalidOdat in boa-dev#4291
  • inline Gc::inner_ptr by @cijiugechu in boa-dev#4317
  • Shrink JsStr from 24 to 16 bytes by @HalidOdat in boa-dev#4322
  • Bump tokio from 1.45.1 to 1.46.1 in the rust-dependencies group by @dependabot[bot] in boa-dev#4324
  • Refactor JsObject to always be size 8 by @raskad in boa-dev#4287
  • Add a new Nullable<T> type that deserialize null to Nullable::<T>::Null by @hansl in boa-dev#4325
  • Refactor JsString's static string tagging by @HalidOdat in boa-dev#4334
  • Bump the rust-dependencies group with 6 updates by @dependabot[bot] in boa-dev#4335
  • Implement native backtrace positions by @HalidOdat in boa-dev#4306
  • Fix documentation for NativeFunction::from_async_fn by @jedel1043 in boa-dev#4344
  • Bump the rust-dependencies group with 2 updates by @dependabot[bot] in boa-dev#4347
  • Bump temporal_rs version to v0.0.11 by @nekevss in boa-dev#4348
  • Add an empty EmbeddedModuleLoader default by @hansl in boa-dev#4351
  • Fix a camel case bug by @hansl in boa-dev#4352
  • Temporal documentation update, part 1 by @nekevss in boa-dev#4353
  • Temporal documentation update, part 2 by @nekevss in boa-dev#4354
  • Temporal documentation, part 3 by @nekevss in boa-dev#4355
  • Temporal documentation update, part 4 by @nekevss in boa-dev#4356
  • Bump tokio from 1.46.1 to 1.47.0 in the rust-dependencies group by @dependabot[bot] in boa-dev#4357
  • Fetch API (beta) by @hansl in boa-dev#4338
  • Remove Box from Object's data member by @HalidOdat in boa-dev#4342
  • Bump the rust-dependencies group with 6 updates by @dependabot[bot] in boa-dev#4361
  • Add support for utf16(-le|be) and use the class API by @hansl in boa-dev#4358
  • Bump temporal_rs version to v0.0.12 by @nekevss in boa-dev#4367
  • Allow public access to the full position of a call frame by @hansl in boa-dev#4365
  • Bump the rust-dependencies group with 5 updates by @dependabot[bot] in boa-dev#4374
  • Bump slab from 0.4.10 to 0.4.11 by @dependabot[bot] in boa-dev#4376
  • Implement queueMicrotask() and a test for it by @hansl in boa-dev#4359
  • Bump actions/checkout from 4 to 5 by @dependabot[bot] in boa-dev#4386
  • Bump the rust-dependencies group with 4 updates by @dependabot[bot] in boa-dev#4387
  • Improve object display by @xubaiwang in boa-dev#4377
  • Fix broken PlainMonthDay.from tests by @nekevss in boa-dev#4389
  • Fix final Temporal.Instant test in built-ins test suite by @nekevss in boa-dev#4388
  • Remove alignment of property keys with identation by @hansl in boa-dev#4390
  • Bump temporal_rs version to v0.0.14 by @nekevss in boa-dev#4391
  • Update Math.sumPrecise to remove SummationState by @nekevss in boa-dev#4392
  • Update phf requirement from 0.12.1 to 0.13.1 in /tests/fuzz in the fuzz-dependencies group by @dependabot[bot] in boa-dev#4384
  • Fix index access in JumpTable instruction by @HalidOdat in boa-dev#4372
  • Bump the rust-dependencies group with 5 updates by @dependabot[bot] in boa-dev#4395
  • Fix: prevent OOB panic in decodeURI by tightening percent-decoding bounds; add test for incomplete escape %E7%9A%8 (#4404) by @hamflx in boa-dev#4405
  • Implement a JsValueStore as well as structuredClone and tests by @hansl in boa-dev#4366
  • Bump baptiste0928/cargo-install from 3.3.1 to 3.3.2 in the ci-dependencies group by @dependabot[bot] in boa-dev#4385
  • Update hashbrown requirement from 0.15.5 to 0.16.0 in /tests/fuzz in the fuzz-dependencies group by @dependabot[bot] in boa-dev#4396
  • Replace the String producing Display logic to using a Formatter by @hansl in boa-dev#4393
  • Propagate AST errors to the user by @hansl in boa-dev#4408
  • Remove the boa_interop module by @hansl in boa-dev#4407
  • Fix final Temporal.PlainTime.from tests by @nekevss in boa-dev#4411
  • Bump the rust-dependencies group with 3 updates by @dependabot[bot] in boa-dev#4413
  • Bump actions/setup-node from 4 to 5 by @dependabot[bot] in boa-dev#4412
  • Various quality of life improvements to the CLI by @hansl in boa-dev#4414
  • Implement Date and RegExp JsValueStore from/to by @hansl in boa-dev#4415
  • Use async channels for Atomics.waitAsync implementation by @jedel1043 in boa-dev#4418
  • Bump the rust-dependencies group across 1 directory with 7 updates by @dependabot[bot] in boa-dev#4421
  • Unblock Context::run_jobs when no timeouts need to be run by @hansl in boa-dev#4416
  • Fix 2 UBs, and cleanup GcRefCell by @hansl in boa-dev#4422
  • Bump temporal_rs version to v0.0.16 by @nekevss in boa-dev#4425
  • Fix the CLI when it is not attached to a TTY by @hansl in boa-dev#4424
  • Bump the rust-dependencies group with 6 updates by @dependabot[bot] in boa-dev#4429
  • Implement JsValueStore for SharedArrayBuffer and postMessage by @hansl in boa-dev#4417
  • fix: comment typo by @jasonmilad in boa-dev#4430
  • Editorconfig: specify indentation and dont overrule Makefile by @hansl in boa-dev#4446
  • Add a simple cargo-make to the project by @hansl in boa-dev#4437
  • Update to temporal_rs to 0.1 release by @nekevss in boa-dev#4433
  • Add minimal CI task to cargo-make by @nekevss in boa-dev#4448
  • Improve regular expression flags parsing by @hansl in boa-dev#4434
  • Bump the rust-dependencies group with 4 updates by @dependabot[bot] in boa-dev#4449
  • Only validate the RegExp, do not optimize/compile it by @hansl in boa-dev#4451
  • Bump peter-evans/create-or-update-comment from 4 to 5 by @dependabot[bot] in boa-dev#4456
  • Bump peter-evans/find-comment from 3 to 4 by @dependabot[bot] in boa-dev#4457
  • Bump bytemuck from 1.23.2 to 1.24.0 in the rust-dependencies group by @dependabot[bot] in boa-dev#4458
  • Allow printing test262 comment on PRs from forks by @jedel1043 in boa-dev#4428
  • perf: Improve Math.sumPrecise Performance by @Gumichocopengin8 in boa-dev#4462
  • Bump the rust-dependencies group with 3 updates by @dependabot[bot] in boa-dev#4467

New Contributors

Full Changelog: https://github.com/boa-dev/boa/compare/v0.20...v0.21

0.20.0 (2024-12-05)

Feature Enhancements

  • Add a js_error! macro to create opaque errors by @hansl in boa-dev#3920
  • Update Instant for new Temporal functionality by @nekevss in boa-dev#3928
  • Add a way to add setters/getters in js_class! by @hansl in boa-dev#3911
  • Fix lints from rustc 1.80.0 by @jedel1043 in boa-dev#3936
  • Add a JsError::from_rust constructor to create native errors from Rust by @hansl in boa-dev#3921
  • add some temporal methods by @jasonwilliams in boa-dev#3856
  • Allow a custom Logger to be used as the backend for boa_runtime::Console by @hansl in boa-dev#3943
  • Add more utility functions around modules and exports by @hansl in boa-dev#3937
  • Allow trailing commas in js_class functions by @hansl in boa-dev#3964
  • Implement Atomics.pause by @jedel1043 in boa-dev#3956
  • Add a clone_inner method to allow cloning of inner data by @hansl in boa-dev#3968
  • fix: ignore debugger statement by @shurizzle in boa-dev#3976
  • Add support for boa(rename = "") in TryFromJs derive by @hansl in boa-dev#3980
  • Add an "iter()" method to Js*Array for convenience by @hansl in boa-dev#3986
  • A simple module loader from a function by @hansl in boa-dev#3932
  • Add a way for js_error! macro to create native errors with message by @hansl in boa-dev#3971
  • Limit actions runs to 1 per branch and fix macos release by @jedel1043 in boa-dev#3996
  • Add TextEncoder, TextDecoder implementations to boa_runtime by @hansl in boa-dev#3994
  • Add TryFromJs for TypedJsFunction and more tests by @hansl in boa-dev#3981
  • Add context to the console Logger trait by @hansl in boa-dev#4005
  • Add a URL class to boa_runtime by @hansl in boa-dev#4004
  • Add a display_lossy() to write a JsString lossily by @hansl in boa-dev#4023
  • TryIntoJs trait and derive macro for it by @Nikita-str in boa-dev#3999
  • console.debug() should use a debug Logger method by @hansl in boa-dev#4019
  • TryFromJs from JsMap for HashMap & BtreeMap by @Nikita-str in boa-dev#3998
  • Add string builder to build JsString by @CrazyboyQCD in boa-dev#3915

Bug Fixes

  • Implement Math.pow function according to ECMAScript specification by @magic-akari in boa-dev#3916
  • Fix temporal builtin properties by @nekevss in boa-dev#3930
  • Fix wrong neg operation by @CrazyboyQCD in boa-dev#3926
  • Fix destructuring assignment evaluation order by @raskad in boa-dev#3934
  • Fix various parser idempotency issues and parsing errors by @raskad in boa-dev#3917
  • Implement new spec changes for AsyncGenerator by @jedel1043 in boa-dev#3950
  • Refactor ast function types by @raskad in boa-dev#3931
  • Fix js_str macro to correctly handle latin1 strings by @jedel1043 in boa-dev#3959
  • Allow dead code for code that is newly detected as unused by @hansl in boa-dev#3984
  • Allow warnings when running CI on release branches by @jedel1043 in boa-dev#3990
  • docs: Fix link to examples by @it-a-me in boa-dev#4007
  • IntegerOrInfinity eq bug fix by @Nikita-str in boa-dev#4010

Internal Improvements

  • Refactor RawJsString's representation to make JsStrings construction from string literal heap-allocation free by @CrazyboyQCD in boa-dev#3935
  • Split default icu data into lazily deserialized parts by @jedel1043 in boa-dev#3948
  • Add clippy for denying print and eprints by @hansl in boa-dev#3967
  • Refactor iterator APIs to be on parity with the latest spec by @jedel1043 in boa-dev#3962
  • Add support for Trace, Finalize and JsData for Convert<> by @hansl in boa-dev#3970
  • use with_capacity to reduce re-allocations fixes #3896 by @jasonwilliams in boa-dev#3961
  • add nightly build by @jasonwilliams in boa-dev#4026
  • Patch the indentation in nightly_build.yml by @nekevss in boa-dev#4028
  • Update night build's rename binary step by @nekevss in boa-dev#4032
  • Use upload-rust-binary-action for nightly release by @nekevss in boa-dev#4040
  • Fix ref value in nightly and add target to nightly release by @nekevss in boa-dev#4042
  • Reduce environment allocations by @raskad in boa-dev#4002

Other Changes

  • Implement more Temporal functionality by @nekevss in boa-dev#3924
  • Add a Source::with_path method to set the path on a Source by @hansl in boa-dev#3941
  • Add spec edition 15 to the tester by @jedel1043 in boa-dev#3957
  • Rename as_promise to as_promise_object and add as_promise -> JsPromise by @hansl in boa-dev#3965
  • Build out partial record functionality, property bag construction, and with methods by @nekevss in boa-dev#3955
  • Enable CI for release branches by @jedel1043 in boa-dev#3987
  • Add a display type for JsString to allow formatting without allocations by @hansl in boa-dev#3951
  • Add TryIntoJsResult for vectors by @hansl in boa-dev#3993
  • Add tests from WPT and fix them in the Console by @hansl in boa-dev#3979
  • Update changelog for v0.19.1 by @jedel1043 in boa-dev#3995
  • Implement register allocation by @HalidOdat in boa-dev#3942
  • Implement scope analysis and local variables by @raskad in boa-dev#3988
  • JsValue::to_json fix integer property keys by @Nikita-str in boa-dev#4011
  • Some optimizations on Error by @CrazyboyQCD in boa-dev#4020
  • Option::None should try into Undefined, not Null by @hansl in boa-dev#4029
  • Some string optimizations by @CrazyboyQCD in boa-dev#4030
  • Add a JsPromise::from_result for convenience by @hansl in boa-dev#4039
  • Fix misspelled permissions in nightly build action by @nekevss in boa-dev#4041
  • Remove dockerfile from documentation by @4yman-0 in boa-dev#4046
  • Bump dependencies with breaking changes by @jedel1043 in boa-dev#4050
  • Migrate to fast-float2 by @jedel1043 in boa-dev#4052

New Contributors

Full Changelog: https://github.com/boa-dev/boa/compare/v0.19...v0.20.0

0.19.1 (2024-09-11)

Bug Fixes

  • Implement new spec changes for AsyncGenerator by @jedel1043 in boa-dev#3950
  • Allow dead code for code that is newly detected as unused by @hansl in boa-dev#3984
  • Allow warnings when running CI on release branches by @jedel1043 in boa-dev#3990

Internal Improvements

  • Add spec edition 15 to the tester by @jedel1043 in boa-dev#3957
  • Enable CI for release branches by @jedel1043 in boa-dev#3987

Full Changelog: https://github.com/boa-dev/boa/compare/v0.19...v0.19.1

0.19.0 (2024-07-08)

Feature Enhancements

  • Add release binary striping by @Razican in boa-dev#3727
  • Added NPM publish workflow by @Razican in boa-dev#3725
  • Remove references to dev docs and npm dependencies by @jedel1043 in boa-dev#3787
  • Cleanup tester deps and patterns by @jedel1043 in boa-dev#3792
  • Build docs.rs docs with all features enabled by @jedel1043 in boa-dev#3794
  • Add a new type Convert<> to convert values by @hansl in boa-dev#3786
  • Add functions to create modules from a JSON value by @hansl in boa-dev#3804
  • Add an embed_module!() macro to boa_interop by @hansl in boa-dev#3784
  • Add a ContextData struct to inject host defined types from the context by @hansl in boa-dev#3802
  • Implement object keys access by @HalidOdat in boa-dev#3832
  • Group dependabot updates by @jedel1043 in boa-dev#3863
  • Adding TryFromJs implementations for BTreeMap and HashMap by @hansl in boa-dev#3844
  • Adding TryFromJs implementations for tuples by @hansl in boa-dev#3843
  • Add a js_class to implement the Class trait without boilerplate by @hansl in boa-dev#3872
  • Implement lossless TryFromJs for integers from f64 by @HalidOdat in boa-dev#3907

Bug Fixes

  • Close for-of iterator when the loop body throws by @raskad in boa-dev#3734
  • Add default value handling for destructuring property access arrays by @raskad in boa-dev#3738
  • Fix invalid syntax errors for allowed let as variable names by @raskad in boa-dev#3743
  • Fix parsing of async in for-of loops by @raskad in boa-dev#3745
  • Fix parsing of binding identifier in try catch parameters by @raskad in boa-dev#3752
  • Add missing environment creation in initial iteration of for loop by @raskad in boa-dev#3751
  • chore: Update README link to reflect new site paths by @NickTomlin in boa-dev#3793
  • Fix order of ToString call in Function constructor by @HalidOdat in boa-dev#3820
  • Fix CI for nextest step by @jedel1043 in boa-dev#3862
  • Fix base objects in with statements by @raskad in boa-dev#3870
  • Fix boa cli history by @raskad in boa-dev#3875
  • Fix hashbang comments by using proper goal symbols by @raskad in boa-dev#3876
  • Fix AsyncGenerator to correctly handle return inside then by @jedel1043 in boa-dev#3879
  • Fix HomeObject for private class methods by @raskad in boa-dev#3897
  • Fix evaluation order in destructive property assignments by @raskad in boa-dev#3895

Internal Improvements

  • Apply new clippy lints for rustc 1.77 by @jedel1043 in boa-dev#3759
  • Change dependabot interval to weekly by @jedel1043 in boa-dev#3758
  • Dense array storage variants for i32 and f64 by @HalidOdat in boa-dev#3760
  • Optimize number to PropertyKey conversion by @HalidOdat in boa-dev#3769
  • don't run test262 on push by @jasonwilliams in boa-dev#3774
  • Check that min <= max in clamp_finite by @jedel1043 in boa-dev#3699
  • Decouple Context from ByteCompiler by @HalidOdat in boa-dev#3829
  • Implement latin1 encoded JsStrings by @HalidOdat in boa-dev#3450
  • Replace js_str with js_string in examples by @getong in boa-dev#3836
  • Separate JsString into its own crate by @HalidOdat in boa-dev#3837
  • Bump temporal_rs to latest commit by @jedel1043 in boa-dev#3880
  • Remove FormalParameterList from CodeBlock by @HalidOdat in boa-dev#3882

Other Changes

  • Fix a few Duration code typos by @robot-head in boa-dev#3730
  • Add a try_from_js implementation for Vec (accept any Array-like) by @hansl in boa-dev#3755
  • Swap to Duration::round from temporal_rs by @robot-head in boa-dev#3731
  • Cache this value by @HalidOdat in boa-dev#3771
  • Allow deserialization of missing objects properties into Option<> by @hansl in boa-dev#3767
  • Optimize Regex match check by @HalidOdat in boa-dev#3779
  • Add a boa_interop crate by @hansl in boa-dev#3772
  • Add a path to Module (and expose it in Referrer) by @hansl in boa-dev#3783
  • Properly resolve paths in SimpleModuleLoader and add path to Referrer::Script by @hansl in boa-dev#3791
  • Fix SimpleModuleLoader on Windows by @hansl in boa-dev#3795
  • Add more utility traits and funtions to boa_interop by @hansl in boa-dev#3773
  • Implement Promise.try() by @linusg in boa-dev#3800
  • Implement TryFromJs for Either<L, R> by @hansl in boa-dev#3822
  • Fix Rust 1.78.0 Clippy lints by @HalidOdat in boa-dev#3838
  • Switch from actions-rs/toolchain to dtolnay/rust-toolchain by @raskad in boa-dev#3845
  • Replace archived github actions from actions-rs by @raskad in boa-dev#3848
  • Add matrix badge and update communication to include matrix by @nekevss in boa-dev#3865
  • Add groupCollapsed by @leoflalv in boa-dev#3867
  • Bump ICU4X to 1.5 and cleanup Intl by @jedel1043 in boa-dev#3868
  • Update regress to v0.10.0 by @raskad in boa-dev#3869
  • Combine HasProperty and Get operations when possible by @raskad in boa-dev#3883
  • Remove some environment clones by @raskad in boa-dev#3884
  • Refactor call frame access to avoid panic checks by @raskad in boa-dev#3888
  • Remove Temporal.Calendar and Temporal.TimeZone by @jedel1043 in boa-dev#3890
  • Update Temporal rounding and implement additional methods by @nekevss in boa-dev#3892
  • format code in comments by @jasonwilliams in boa-dev#3902
  • Updates to temporal_rs version and temporal methods by @nekevss in boa-dev#3900
  • Patch regression from change to to-relative-to-object by @nekevss in boa-dev#3906
  • Add get_unchecked method to JsString and JsStr by @CrazyboyQCD in boa-dev#3898
  • bump gc threshold by @jasonwilliams in boa-dev#3908
  • update versions and ABOUT files by @jasonwilliams in boa-dev#3903
  • Cleanup README.md and contributor documentation by @jedel1043 in boa-dev#3909
  • Refactor environment stack to remove some panics by @raskad in boa-dev#3893

New Contributors

Full Changelog: https://github.com/boa-dev/boa/compare/v0.18...v0.19

0.18.0 (2024-03-04)

Feature Enhancements

  • Format let-else expressions by @jedel1043 in boa-dev#3102
  • Add regexp indices (d flag) support by @dirkdev98 in boa-dev#3094
  • Add missing 'unscopables' to Array.prototype[@@unscopables] by @dirkdev98 in boa-dev#3111
  • Updated Fuzzer dependencies and added them to Dependabot by @Razican in boa-dev#3124
  • Implement findLast and findLastIndex on TypedArray by @dirkdev98 in boa-dev#3135
  • Implement i128/u128 to JsBigInt conversions by @AlvinKuruvilla in boa-dev#3129
  • Implement String.prototype.isWellFormed and String.prototype.toWellFormed by @raskad in boa-dev#3187
  • Clarify usage section in README.md by @postmeback in boa-dev#3092
  • Log traces even without message (boa_runtime) by @kelbazz in boa-dev#3193
  • Implement ephemeron-based weak map by @jedel1043 in boa-dev#3052
  • Improve bytecompiler bytecode generation. by @HalidOdat in boa-dev#3188
  • Add Instruction and InstructionIterator by @HalidOdat in boa-dev#3201
  • Add ECMAScript 14 to boa_tester by @jedel1043 in boa-dev#3273
  • Bump rust-version to 1.71 by @jedel1043 in boa-dev#3290
  • Lazily download test262 repository by @HalidOdat in boa-dev#3214
  • Implement Gc::new_cyclic by @jedel1043 in boa-dev#3292
  • Implement Intl.PluralRules by @jedel1043 in boa-dev#3298
  • Implement step 5 in RegExp constructor by @HalidOdat in boa-dev#3305
  • Replace #[deny] with #[warn] by @jedel1043 in boa-dev#3309
  • Bump ICU4X to 1.3 by @jedel1043 in boa-dev#3306
  • Migrate to workspace deps by @jedel1043 in boa-dev#3313
  • Implement [[HostDefined]] field on Realms by @HalidOdat in boa-dev#2952
  • Introduce experimental features by @jedel1043 in boa-dev#3318
  • Introduce a Class map by @jedel1043 in boa-dev#3315
  • Fix Function.prototype.toString() by @HalidOdat in boa-dev#3374
  • First portion of the Temporal implementation by @nekevss in boa-dev#3277
  • Update feature flags to specific feature flag by @nekevss in boa-dev#3376
  • Implement [[HostDefined]] for Module and Script by @arexon in boa-dev#3381
  • Implement synthetic modules by @jedel1043 in boa-dev#3294
  • Prevent test262 repository update if not needed by @HalidOdat in boa-dev#3386
  • Implement SharedArrayBuffer by @jedel1043 in boa-dev#3384
  • Add Context::create_realm by @johnyob in boa-dev#3369
  • Introduce a thread safe version of JsError by @jedel1043 in boa-dev#3398
  • Implement asynchronous evaluation of scripts by @jedel1043 in boa-dev#3044
  • Feature get/set $boa.limits.stack by @HalidOdat in boa-dev#3385
  • Implement change-array-by-copy methods by @jedel1043 in boa-dev#3412
  • Implement the array-grouping proposal by @jedel1043 in boa-dev#3420
  • Implement Atomics builtin by @jedel1043 in boa-dev#3394
  • Migrate to workspace lints by @jedel1043 in boa-dev#3334
  • Bump ICU4X to 1.4 and finish Intl impls with new APIs by @jedel1043 in boa-dev#3469
  • Class: Switch make_data parameter from this to new_target by @johnyob in boa-dev#3478
  • Add utility methods to the Class trait by @jedel1043 in boa-dev#3488
  • Simplify Icu API by @jedel1043 in boa-dev#3503
  • Add UTF-16 input parsing by @raskad in boa-dev#3538
  • Remove allocations from HostDefined::get_many_mut by @jedel1043 in boa-dev#3606
  • Implement getter for ArrayBuffer data by @HalidOdat in boa-dev#3610
  • Implement non-erased JsObjects by @jedel1043 in boa-dev#3618
  • Update regress to v0.8.0 and use UTF16 / UCS2 matching by @raskad in boa-dev#3627
  • Cleanup 262 tester and stabilize some experimental features by @jedel1043 in boa-dev#3632
  • Improve typing of DataView and related objects by @jedel1043 in boa-dev#3626
  • Close sync iterator when async wrapper yields rejection by @jedel1043 in boa-dev#3633
  • Implement resizable buffers by @jedel1043 in boa-dev#3634
  • Implement stage 3 feature "arraybuffer-transfer" by @jedel1043 in boa-dev#3649
  • Implement prototype of NumberFormat by @jedel1043 in boa-dev#3669
  • Add example for async module fetches by @jedel1043 in boa-dev#3012
  • Js typed array methods by @AngeloChecked in boa-dev#3481
  • Create tool to regenerate ABOUT.md by @jedel1043 in boa-dev#3692
  • Implement RegExp v flag by @raskad in boa-dev#3695

Bug Fixes

Internal Improvements

Other Changes

New Contributors

Full Changelog: https://github.com/boa-dev/boa/compare/v0.17...v0.18

0.17.0 (2023-07-05)

Feature Enhancements

  • Implement new.target expression by @raskad in #2299
  • Parse static async private methods in classes by @raskad in #2315
  • Implement JsDataView by @nekevss in #2308
  • Upgrade clap to 4.0, add value hints for zsh and fish by @Razican in #2336
  • Implement JsRegExp by @nekevss in #2326
  • Create new lazy Error type by @jedel1043 in #2283
  • Fixed some documentation and clippy warnings in tests by @Razican in #2362
  • Removed the "VM Implementation" headline for Test262 by @Razican in #2364
  • Modified the loadfile example to show how Boa can read bytes by @Razican in #2363
  • Implement LabelledStatement by @jedel1043 in #2349
  • Split vm/opcode into modules by @nekevss in #2343
  • Removed some duplicate code, added ToIndentedString by @Razican in #2367
  • Document the AST by @jedel1043 in #2377
  • Implement member accessors in initializer of for loops by @jedel1043 in #2381
  • Implement JsGenerator and wrapper docs clean up by @nekevss in #2380
  • Add named evaluation of logical assignments by @raskad in #2389
  • Implement optional chains by @jedel1043 in #2390
  • Implement delete for references by @jedel1043 in #2395
  • Implement AST Visitor pattern (attempt #3) by @addisoncrump in #2392
  • Implement async arrow functions by @raskad in #2393
  • Pretty print promise objects by @jedel1043 in #2407
  • Parser Idempotency Fuzzer by @addisoncrump in #2400
  • Safe wrapper for JsDate by @anuvratsingh in #2181
  • Fix some Date tests by @jedel1043 in #2431
  • Boa Gc implementation draft by @nekevss in #2394
  • VM Fuzzer by @addisoncrump in #2401
  • Implement the WeakRef builtin by @jedel1043 in #2438
  • Refactor the Date builtin by @jedel1043 in #2449
  • Implement instruction flowgraph generator by @HalidOdat in #2422
  • JsArrayBuffer take method and docs by @nekevss in #2454
  • Set function names in object literal methods by @raskad in #2460
  • Redesign Intl API and implement some services by @jedel1043 in #2478
  • Cleanup Context APIs by @jedel1043 in #2504
  • Prepare Promises for new host hooks and job queue API by @jedel1043 in #2528
  • Implement host hooks and job queues APIs by @jedel1043 in #2529
  • First batch of no_std support for some sub-crates by @jedel1043 in #2544
  • Create Source to abstract JS code sources by @jedel1043 in #2579
  • Move increment and decrement operations to Update expression by @raskad in #2565
  • Implement binary in operation with private names by @raskad in #2582
  • Module parsing by @Razican in #2411
  • Implement WeakSet by @lupd in #2586
  • Implement WeakMap by @raskad in #2597
  • API to construct a NativeFunction from a native async function by @jedel1043 in #2542
  • Add --strict flag to cli by @HalidOdat in #2689
  • Add timeout to CI by @HalidOdat in #2691
  • Add ES5 and ES6 Conformance calculation to boa_tester by @ZackMitkin in #2690
  • Improve tester display for multiple editions by @jedel1043 in #2720
  • Implement JsPromise wrapper by @jedel1043 in #2758
  • Initial version of a JS -> Rust conversion trait. by @Razican in #2276
  • Implement escape and unescape by @jedel1043 in #2768
  • Implement debug object for CLI by @HalidOdat in #2772
  • Make Realm shareable between functions by @jedel1043 in #2801
  • Implement Annex-B string html methods by @HalidOdat in #2798
  • Implement annex-b trimLeft and trimRight string methods by @HalidOdat in #2806
  • Implement HTML comments and gate behind the annex-b feature by @jedel1043 in #2817
  • Implement Intl.Segmenter by @jedel1043 in #2840
  • Implement var initializers in for-in loops by @jedel1043 in #2842
  • Improve debug output of JsNativeError and Realm by @jedel1043 in #2894
  • Implement runtime limits for loops by @HalidOdat in #2857
  • Implement runtime limits for recursion by @HalidOdat in #2904
  • Implement annexB Block-Level Function Declarations by @raskad in #2910
  • Implement module execution by @jedel1043 in #2922
  • Type safe root shape by @HalidOdat in #2940
  • Implement dynamic imports by @jedel1043 in #2932
  • Implement pseudo-property import.meta by @jedel1043 in #2956
  • Implement with and object environments by @raskad in #2692
  • Add hooks to get the current time and timezone by @jedel1043 in #2824
  • Make JsSymbol thread-safe by @jedel1043 in #2539
  • Added a Boa runtime by @Razican in #2743
  • Implement TryFromJs for JsObject wrappers by @Razican in #2809
  • Allow passing owned HostHooks and JobQueues to Context by @jedel1043 in #2811
  • Implement String.prototype.toLocaleUpper/LowerCase by @jedel1043 in #2822
  • Implement constant folding optimization by @HalidOdat in #2679
  • Implement Hidden classes by @HalidOdat in #2723
  • show object kind, name and address when using dbg! by @jasonwilliams in #2960
  • Add convenience methods to ModuleLoader by @jedel1043 in #3007
  • Allow JobQueue to concurrently run jobs by @jedel1043 in #3036
  • Make IntegerIndexed::byte_offset public by @CryZe in #3017
  • Allow awaiting JsPromise from Rust code by @jedel1043 in #3011
  • Cache cargo-tarpaulin binary by @jedel1043 in #3071
  • add link to the main logo by @jasonwilliams in #3082

Bug Fixes

  • Add unicode terminator to line comment by @creampnx-x in #2301
  • Fix function property order by @raskad in #2305
  • Fix some Array spec deviations by @raskad in #2306
  • Fix double conversion to primitive in ToNumeric by @raskad in #2310
  • Fixing the output for the test diffs in PRs by @Razican in #2320
  • Fix Regex literal parsing in MemberExpression by @tunz in #2328
  • Fix error in Proxy set implementation by @raskad in #2369
  • Allow LineTerminator before Semicolon in continue by @raskad in #2371
  • Fix var collisions in strict eval calls by @jedel1043 in #2382
  • Set in to true when parsing AssignmentExpression in ConditionalExpression by @raskad in #2386
  • Skip prototype field definition for arrow function by @raskad in #2388
  • Remove invalid optimization in addition by @raskad in #2387
  • Fix order dependent execution in assignment. by @HalidOdat in #2378
  • Add early error for yield in GeneratorExpression parameters by @raskad in #2413
  • Handle __proto__ fields in object literals by @raskad in #2423
  • Fix built-ins/Array/prototype/toString/non-callable-join-string-tag.js test case by @akavi in #2458
  • Fix PartialEq for JsBigInt and f64 by @raskad in #2461
  • Allow class expressions without identifier by @raskad in #2464
  • Fix to weak_trace for boa_tester by @nekevss in #2470
  • Fix unary operations on this by @veera-sivarajan in #2507
  • Fix postfix operator line terminator parsing by @raskad in #2520
  • Remove Literal::Undefined by @veera-sivarajan in #2518
  • Add early errors for 'eval' or 'arguments' in parameters by @raskad in #2515
  • Pass a receiver value in property getter opcodes by @raskad in #2516
  • Add regex literal early errors by @raskad in #2517
  • Break Opcode and ByteCompiler changes by @nekevss in #2523
  • Refactor some class features by @raskad in #2513
  • Recognize Directive Prologues correctly by @raskad in #2521
  • Correctly parse consecutive semicolons by @raskad in #2533
  • Fix some HoistableDeclaration parsing errors by @raskad in #2532
  • Return the correct value from a statement list by @raskad in #2554
  • Fix error for static class methods named prototype by @raskad in #2552
  • Avoid creating prototype property on methods by @raskad in #2553
  • Fix double property access on assignment ops by @raskad in #2551
  • Add early errors for escaped identifiers by @raskad in #2546
  • Fix failing collator tests by @jedel1043 in #2575
  • fuzzer: bubble up NoInstructionsRemain error instead of trying to handle as exception by @Mrmaxmeier in #2566
  • Try-catch-block control flow fix/refactor by @nekevss in #2568
  • Fix doc tests and add CI check by @jedel1043 in #2606
  • Fix string to number conversion for infinity by @raskad in #2607
  • Fix exponent operator by @HalidOdat in #2681
  • Update README.md cli options by @HalidOdat in #2678
  • Fix incorrect Number.MIN_VALUE value by @HalidOdat in #2682
  • Correctly run async tests by @jedel1043 in #2683
  • Fix value to bigint conversion by @HalidOdat in #2688
  • Fix Object constructor by @raskad in #2694
  • Fix get function opcode traces by @HalidOdat in #2708
  • Add early errors to dynamic function constructors by @raskad in #2716
  • Add negative zero handling for Map.delete by @raskad in #2726
  • Fix remaining Set tests by @raskad in #2725
  • Fix update expressions getting values multiple times by @raskad in #2733
  • Make if statements return their completion values by @raskad in #2739
  • Fix super call execution order by @raskad in #2724
  • Fix deserialization of SpecEdition by @jedel1043 in #2762
  • Add json-parse-with-source feature to boa_tester by @HalidOdat in #2778
  • Fix Symbol.prototype[@@iterator] by @HalidOdat in #2800
  • Fix String.prototype.replace() order of ToString execution by @HalidOdat in #2799
  • Fix ThrowTypeError intrinsic by @HalidOdat in #2797
  • Fix String.prototype.substr() by @HalidOdat in #2805
  • Fix destructive for-of loop assignments by @raskad in #2803
  • Fix TypedArrays minus zero key by @HalidOdat in #2808
  • Fix sync generator yield expressions by @raskad in #2838
  • Fix async generators by @raskad in #2853
  • Catch 'eval' and 'arguments' in setter method parameter by @raskad in #2858
  • Fix PropertyKey index parse by @HalidOdat in #2843
  • Fix Date.prototype[Symbol.primitive] incorrect attributes by @HalidOdat in #2862
  • Allow Date object to store invalid NativeDateTime by @HalidOdat in #2861
  • Fix panic when calling toString with radix by @HalidOdat in #2863
  • Fix incorrect LoopContinue instruction in while-do loops by @HalidOdat in #2866
  • Initialize var bindings in runtime environments with undefined by @raskad in #2860
  • Bugfix/new.target is not understood by the parser as an expression #2793 by @projectnoa in #2878
  • Fix RegExp constructor return value when pattern is a regexp by @HalidOdat in #2880
  • RegExp constructor should call IsRegExp() by @HalidOdat in #2881
  • Fix for-of expression parsing by @HalidOdat in #2882
  • Disallow strict directives with escaped sequences by @jedel1043 in #2892
  • Make typeof throw when accessing uninitialized variables by @raskad in #2902
  • Fix wrong name of Function.prototype[Symbol.hasInstance] by @raskad in #2905
  • Fix remaining object literal tests by @raskad in #2906
  • Add SyntaxErrors in GlobalDeclarationInstantiation by @raskad in #2908
  • Fix switch default execution by @HalidOdat in #2907
  • Add loop and switch return values by @raskad in #2828
  • Allow escaped let as expression by @HalidOdat in #2916
  • Allow let name in for-in loop in non-strict mode by @HalidOdat in #2915
  • Fix lexical environments in for loops by @raskad in #2917
  • Fix GetSubstitution by @HalidOdat in #2933
  • Allow escaped async as binding name by @jedel1043 in #2936
  • Fix tagged template creation by @raskad in #2925
  • Implement Private Runtime Environments by @raskad in #2929
  • Fix remaining ES5 built-ins/RegExp tests by @HalidOdat in #2957
  • Fix remaining static module bugs by @jedel1043 in #2955
  • Deny Unicode Escapes in boolean and null expressions by @veera-sivarajan in #2931
  • Fix Date for dynamic timezones by @jedel1043 in #2877
  • Fix ES5 selector by @veera-sivaraja in #2924
  • Labelled ByteCompiler Fix by @nekevss in #2534
  • Fix verbose test display by @jedel1043 in #2731
  • Fix WASM playground by @jedel1043 in #2992
  • Correctly initialize functions inside modules by @jedel1043 in #2993
  • Allow true, false and null in object patterns by @jedel1043 in #2994
  • Fix panic in optional expressions with private identifiers by @raskad in #2995
  • Fix prompt on windows by @ShaneEverittM in #2986
  • Fix panic in constructor call by @raskad in #3001
  • Unify async iterators and iterators compilation by @jedel1043 in #2976
  • Correctly parse yield import(..) expressions by @jedel1043 in #3006
  • Return the correct value during a labelled break by @raskad in #2996
  • Fix panics on empty return values by @raskad in #3018
  • Add early error for await in class static blocks by @raskad in #3019
  • Fix class constructor return value by @raskad in #3028
  • Fix super property access by @raskad in #3026
  • Skip reversing arguments in SuperCallDerived by @dirkdev98 in #3062
  • Mark header of rooted ephemerons when tracing by @jedel1043 in #3049
  • Copy ABOUT.md file to all published crates by @jedel1043 in #3074
  • Correctly handle finally..loop..break by @dirkdev98 in #3073

Internal Improvements

  • Direct conversion from u8 to Opcode by @HalidOdat #2951
  • Fix links in readme by @raskad in #2304
  • Switch to workspace inherited properties by @jedel1043 in #2297
  • Separate JsObjectType implementors to their own module by @CalliEve in #2324
  • First prototype for new JsString using UTF-16 by @jedel1043 in #1659
  • Split Node into Statement, Expression and Declaration by @jedel1043 in #2319
  • Changes neccesary -> necessary by @nekevss in #2370
  • Cleanup and speed-up CI by @RageKnify in #2376
  • Reduce documentation size in blog by @jedel1043 in #2383
  • Generate Opcode impl using macro by @jedel1043 in #2391
  • Extract the ast to a crate by @jedel1043 in #2402
  • Replace contains and friends with visitors by @jedel1043 in #2403
  • Rewrite some patterns with let-else and ok_or_else by @jedel1043 in #2404
  • Fix async tests result values by @jedel1043 in #2406
  • Rewrite scope analysis operations using visitors by @jedel1043 in #2408
  • Make JsString conform to miri tests by @jedel1043 in #2412
  • Reduced boilerplate code in the parser by @Razican in #2410
  • Extract the parser into a crate by @jedel1043 in #2409
  • Switch tarpaulin to llvm engine by @RageKnify in #2432
  • Cleanup boa_tester by @jedel1043 in #2440
  • Restructure lint lists in boa_ast by @raskad in #2433
  • Restructure lints in multiple crates by @raskad in #2447
  • Restructure lint lists in boa_engine by @raskad in #2455
  • Fix rust 1.66.0 lints by @raskad in #2486
  • Divide byte compiler by @e-codes-stuff in #2425
  • Cleanup inline annotations by @jedel1043 in #2493
  • [profiler] Cache StringId by @tunz in #2495
  • Improve identifier parsing by @jedel1043 in #2581
  • Remove Syntax Errors from Bytecompiler by @raskad in #2598
  • fix: RUSTSEC-2020-0071 in boa_engine by @hanabi1224 in #2627
  • Migrate tests to new test API by @jedel1043 in #2619
  • [regexp] new tests for unicode flag by @selfisekai in #2656
  • Handle surrogates in String.fromCodePoint by @jedel1043 in #2659
  • Bump Test262 and add new features by @jedel1043 in #2729
  • Fix cross-realm construction bugs by @jedel1043 in #2786
  • Lift InternalObjectMethods from Object by @jedel1043 in #2790
  • Implement async functions using generators by @jedel1043 in #2821
  • Improve strictness of GeneratorState by @jedel1043 in #2837
  • Upgraded to ICU 1.2 by @Razican in #2826
  • Fix setting properties inside with blocks by @jedel1043 in #2847
  • Create a unique PromiseCapability on each async function call by @jedel1043 in #2846
  • Refactor binding handling APIs by @jedel1043 in #2870
  • Refactor guards into a ContextCleanupGuard abstraction by @jedel1043 in #2890
  • Refactor binding declarations by @raskad in #2887
  • Cleanup some bytecompiler code by @raskad in #2918
  • Fix use_self lints by @raskad in #2946
  • Remove unused lint allows by @raskad in #2968
  • Decouple bytecompiler from CodeBlock by @HalidOdat in #2669
  • Clarity changes for the VM by @nekevss in #2531
  • Bump bitflags to 2.0.0 by @Razican in #2666
  • Replace deprecated set-output command by @karol-jani in #2500
  • Documentation Updates by @nekevss in #2463
  • Fixed typo in the docs by @Razican in #2450
  • update tasks.json by @jasonwilliams in #2313
  • Updated the Code of Conduct by @Razican in #2365
  • Bump serde_json from 1.0.85 to 1.0.86 by @jedel1043 in #2341
  • Add test case for issue #2719 by @jedel1043 in #2980
  • Remove unneded num_bindings in Opcodes and CodeBlock by @HalidOdat in #2967
  • Added period to sentence by @nekevss in #2939
  • Prune collected shared shapes by @HalidOdat in #2941
  • Separate declarative environment kinds by @jedel1043 in #2921
  • Shrink environment binding locators by @HalidOdat in #2950
  • Extract "About Boa" section into a separate file by @jedel1043 in #2938
  • Remove arguments_binding field from CodeBlock by @HalidOdat in #2969
  • Remove redundant param_count field from CallFrame by @HalidOdat in #2962
  • Direct length access on arrays by @HalidOdat in #2796
  • Prevent allocation of field names by @HalidOdat in #2901
  • Added unit tests for boa_ast::Punctuator by @Razican in #2884
  • Added unit tests for boa_ast::Keyword by @Razican in #2883
  • Make update operations reuse the last found binding locator by @jedel1043 in #2876
  • Docs update for boa_runtime and console documentation by @nekevss in #2891
  • Direct array element access on ByValue instructions by @HalidOdat in #2827
  • Optimize String.prototype.normalize by @jedel1043 in #2848
  • Fix more Annex B tests by @jedel1043 in #2841
  • Enable github queues and remove bors.toml by @jedel1043 in #2899
  • Shrink size of IndexedProperties by @HalidOdat in #2757
  • Added an example usage to documentation by @Razican in #2742
  • Don't construct prototype if not needed by @HalidOdat in #2751
  • Implement is_identifier_(start/part) using icu_properties by @jedel1043 in #2865
  • Add boa logo to remaining hosted docs by @nekevss in #2740
  • Added a bunch more tests by @Razican in #2885
  • Updated dependencies, removes remove_dir_all, which is vulnerable by @Razican in #2685
  • Updated README by @Razican in #2825
  • Remove panics on module compilation by @jedel1043 in #2730
  • Update icu dependencies by @raskad in #2574
  • Pin tarpaulin version to 0.22 by @jedel1043 in #2562
  • Improve the design of ephemerons in our GC by @jedel1043 in #2530
  • Pass locale data provider by ref instead of boxing by @jedel1043 in #2508
  • Fast path for static property keys by @tunz in #2604
  • Replace criterion::black_box with std::hint::black_box by @jedel1043 in #2494
  • Shrink objects by using ThinVecs by @HalidOdat in #2752
  • Redesign native functions and closures API by @jedel1043 in #2499
  • Make the wasmbind feature of the chrono crate optional by @Razican in #2810
  • Use opcode table rather than match by @tunz in #2501
  • Align iterator loops to the spec by @jedel1043 in #2686
  • Add AST node for parenthesized expressions by @raskad in #2738
  • Optimize Get/SetPropertyByName by @tunz in #2608
  • Keep Integer type for inc/dec of an integer by @tunz in #2615
  • Implement CompletionRecords for the Vm by @nekevss in #2618
  • Feature flag on builtins console import by @nekevss in #2584
  • Fix documentation links by @Razican in #2741
  • Updated syn to 2.0.3 by @Razican in #2702
  • Cleanup intrinsics and move to realm by @jedel1043 in #2555
  • Rename check_parser and Identifier by @jedel1043 in #2576
  • Fix rust 1.67 lints by @raskad in #2567
  • Avoid unneeded bounds checks in bytecode address patching by @HalidOdat in #2680
  • Rust 1.68 clippy fixes by @nekevss in #2646
  • Fix rust 1.70 lints by @raskad in #2990
  • Simplify/Refactor exception handling and last statement value by @HalidOdat in #3053

0.16.0 (2022-09-25)

Feature Enhancements

  • Implement getter and setter of Object.prototype.__proto__ by @CYBAI in #2110
  • Execution stack & promises by @Razican in #2107
  • Add the [[Done]] field to iterators by @Razican in #2125
  • Fix for in/of loop initializer environment by @raskad in #2135
  • Implement Promise.all by @raskad in #2140
  • Implement Promise.any by @raskad in #2145
  • Implement Promise.allSettled by @raskad in #2146
  • Implement super expressions by @raskad in #2116
  • Implement async function and await by @raskad in #2158
  • Implementation of JsMap Wrapper by @nekevss in #2115
  • Safe wrapper for JsSet by @anuvratsingh in #2162
  • Implement JsArrayBuffer by @HalidOdat in #2170
  • Implement arrow function parsing based on CoverParenthesizedExpressionAndArrowParameterList by @raskad in #2171
  • Implement Generator Function Constructor by @raskad in #2174
  • Parse class private async generator methods by @raskad in #2220
  • Implement Async Generators by @raskad in #2200
  • Add field accessors to destructing assignment by @raskad in #2213
  • Added a bit more integer operation consistency to ByteDataBlock creation by @Razican in #2272
  • Implement Async-from-Sync Iterator Objects by @raskad in #2234
  • Add URI encoding and decoding functions by @Razican in #2267
  • Implement for await...of loops by @raskad in #2286

Bug Fixes

  • Fix eval attributes by @raskad in #2130
  • Fix this in function calls by @raskad in #2153
  • Fix remaining Promise bugs by @raskad in #2156
  • Fix length/index in 32bit architectures by @HalidOdat in #2196
  • Fix yield expression to end on line terminator by @raskad in #2232
  • Fix spread arguments in function calls by @raskad in #2216
  • Fix arguments object iterator function by @raskad in #2231
  • check history file exist if not create it by @udhaykumarbala in #2245
  • Do not auto-insert semicolon in VariableDeclarationList by @tunz in #2266
  • Fix property access of call expression by @tunz in #2273
  • fix computed property methods can call super methods by @creampnx-x in #2274
  • Fix regex literal /[/]/ by @tunz in #2277
  • Fixed assignment expression parsing by @Razican in #2268
  • Fix labelled block statement by @creampnx-x in #2285
  • Implement missing global object internal methods by @raskad in #2287

Internal Improvements

  • Fix spec links for some object operation methods by @CYBAI in #2111
  • Only run benchmarks on PRs when a label is set by @raskad in #2114
  • Refactor construct and PromiseCapability to preserve JsObject invariants by @jedel1043 in #2136
  • Remove string-interner dependency and implement custom string Interner by @jedel1043 in #2147
  • Fix clippy 1.62.0 lints by @raskad in #2154
  • Store call frames in Vec instead of singly-linked list by @HalidOdat in #2164
  • Dense/Packed JavaScript arrays by @HalidOdat in #2167
  • Fix Rust 1.63 clippy lints by @raskad in #2230
  • Removed some unsafe_empty_trace!() calls to improve performance by @Razican in #2233
  • Add integer type to fast path of to_property_key by @tunz in #2261

Full Changelog: https://github.com/boa-dev/boa/compare/v0.14...v0.15

0.15.0 (2022-06-10)

Feature Enhancements

  • Deploy playground to custom destination dir by @jedel1043 in #1943
  • add README for crates.io publish by @superhawk610 in #1952
  • migrated to clap 3 by @manthanabc in #1957
  • Implement unscopables for Array.prototype by @NorbertGarfield in #1963
  • Retrieve feature-based results for Test262 runs by @NorbertGarfield in #1980
  • Added better error handling for the Boa tester by @Razican in #1984
  • Add From for JsValue by @lastmjs in #1990
  • Implement Classes by @raskad in #1976
  • Allow PropertyNames in BindingPropertyin ObjectBindingPattern by @raskad in #2022
  • Allow Initializer after ArrayBindingPattern in FormalParameter by @raskad in #2002
  • Allow unicode escaped characters in identifiers that are keywords by @raskad in #2021
  • Feature JsTypedArrays by @HalidOdat in #2003
  • Allow creating object with true/false property names by @lupd in #2028
  • Implement get RegExp.prototype.hasIndices by @HalidOdat in #2031
  • Partial implementation for Intl.DateTimeFormat by @NorbertGarfield in #2025
  • Allow let as variable declaration name by @raskad in #2044
  • cargo workspaces fixes #2001 by @jasonwilliams in #2026
  • Move redeclaration errors to parser by @raskad in #2027
  • Feature JsFunction by @HalidOdat in #2015
  • Improve JsString performance by @YXL76 in #2042
  • Implement ResolveLocale helper by @NorbertGarfield in #2036
  • Refactor IdentifierReference parsing by @raskad in #2055
  • Implement the global eval() function by @raskad in #2041
  • DateTimeFormat helpers by @NorbertGarfield in #2064
  • Create Date standard constructor by @jedel1043 in #2079
  • Implement ProxyBuilder by @jedel1043 in #2076
  • Remove strict flag from Context by @raskad in #2069
  • Integrate ICU4X into Intl module by @jedel1043 in #2083
  • Implement Function constructor by @raskad in #2090
  • Parse private generator methods in classes by @raskad in #2092

Bug Fixes

  • Fix link to the playground by @raskad in #1947
  • convert inner datetime to local in to_date_string by @superhawk610 in #1953
  • Fix panic on AST dump in JSON format by @kilotaras in #1959
  • Fix panic in do while by @pdogr in #1968
  • Support numbers with multiple leading zeroes by @lupd in #1979
  • Fix length properties on array methods by @lupd in #1983
  • Allow boolean/null as property identifier by dot operator assignment by @lupd in #1985
  • fix(vm): off-by-one in code block stringification. by @tsutton in #1999
  • Indicate bigint has constructor by @lupd in #2008
  • Change ArrayBuffer byteLength to accessor property by @lupd in #2010
  • Fix ArrayBuffer.isView() by @HalidOdat in #2019
  • Fix casting negative number to usize in Array.splice by @lupd in #2030
  • Fix Symbol and BigInt constructors by @HalidOdat in #2032
  • Make Array.prototype an array object by @HalidOdat in #2033
  • Fix early return in for in loop head by @raskad in #2043

Internal Improvements

  • docs: update README by structuring the topics by @ftonato in #1958
  • Migrate to NPM and cleanup Playground by @jedel1043 in #1951
  • Fix performance bottleneck in VM by @pdogr in #1973
  • Remove git2 and hex dependencies by @raskad in #1992
  • Fix rust 1.60 clippy lints by @raskad in #2014
  • Refactor RegExp constructor methods by @raskad in #2049
  • Fixing build for changes in clippy for Rust 1.61 by @Razican in #2082

Full Changelog: https://github.com/boa-dev/boa/compare/v0.14...v0.15

0.14.0 (2022-03-15) - Virtual Machine

Feature Enhancements

  • Implement functions for vm by @HalidOdat in #1433
  • Implement Object.getOwnPropertyNames and Object.getOwnPropertySymbols by @kevinputera in #1606
  • Implement Symbol.prototype.valueOf by @hle0 in #1618
  • Implement Array.prototype.at() by @nekevss in #1613
  • Implement Array.from by @nrabulinski #1831
  • Implement String.fromCharCode by @hle0 in #1619
  • Implement Typed Array built-in by @Razican in #1552
  • Implement arguments exotic objects by @jedel1043 in #1522
  • Allow BindingPatterns as CatchParameter by @lowr in #1628
  • Implement Symbol.prototype[ @@toPrimitive ] by @Nimpruda in #1634
  • Implement Generator parsing by @raskad in #1575
  • Implement Object.hasOwn and improve Object.prototype.hasOwnProperty by @kevinputera in #1639
  • Hashbang lexer support by @nekevss in #1631
  • Implement delete operator in the vm by @raskad in #1649
  • Implement Object.fromEntries by @kevinputera in #1660
  • Initial implementation for increment/decrement in VM by @abhishekc-sharma in #1621
  • Implement Proxy object by @raskad in #1664
  • Implement object literals for vm by @raskad in #1668
  • Implement Array findLast and findLastIndex by @bsinky in #1665
  • Implement DataView built-in object by @Nimpruda in #1662
  • Clean-up contribution guidelines, dependencies, Test262, MSRV by @Razican in #1683
  • Implement Async Generator Parsing by @nekevss in #1669
  • Implement prototype of Intl built-in by @hle0 in #1622
  • Add limited console.trace implementation by @osman-turan in #1623
  • Allow BindingPattern in function parameters by @am-a-man in #1666
  • Small test ux improvements by @orndorffgrant in #1704
  • Implement missing vm operations by @raskad in #1697
  • Added fallible allocation to data blocks by @Razican in #1728
  • Document CodeBlock by @TheDoctor314 in #1691
  • Generic JsResult<R> in context.throw_ methods by @HalidOdat in #1734
  • Implement String.raw( template, ...substitutions ) by @HalidOdat in #1741
  • Updated test262 suite and dependencies by @Razican in #1755
  • Lexer string interning by @Razican in #1758
  • Adjust compile and execute to avoid clones by @Razican in #1778
  • Interner support in the parser by @Razican in #1765
  • Convert Codeblock variables to Sym by @raskad in #1798
  • Using production builds for WebAssembly by @Razican in #1825
  • Give the arrow function its proper name by @rumpl in #1832
  • Unwrap removal by @Razican in #1842
  • Feature JsArray by @HalidOdat in #1746
  • Rename "Boa" to boa_engine, moved GC and profiler to their crates by @Razican in #1844
  • Added conversions from and to serde_json's Value type by @Razican in #1851
  • Toggleable JsValue internals displaying by @HalidOdat in #1865
  • Implement generator execution by @raskad in #1790
  • Feature arrays with empty elements by @HalidOdat in #1870
  • Removed reference counted pointers from JsValue variants by @Razican in #1866
  • Implement Object.prototype.toLocaleString() by @HalidOdat in #1875
  • Implement AggregateError by @HalidOdat in #1888
  • Implement destructing assignments for assignment expressions by @raskad in #1895
  • Added boa examples by @elasmojs in #1161

Bug Fixes

  • Fix BigInt and Number comparison by @HalidOdat #1887
  • Fix broken structure links in the documentation by @abhishekc-sharma in #1612
  • Use function name from identifiers in assignment expressions by @raskad #1908
  • Fix integer parsing by @nrabulinski in #1614
  • Fix Number.toExponential and Number.toFixed by @nrabulinski in #1620
  • Badge updates by @atouchet in #1638
  • refactor: fix construct_error functions by @RageKnify in #1703
  • Fix internal vm tests by @raskad in #1718
  • Removed a bunch of warnings and clippy errors by @Razican in #1754
  • Fix some broken links in the profiler documentation by @Razican in #1762
  • Add proxy handling in isArray method by @raskad in #1777
  • Copy/paste fix in Proxy error message by @icecream17 in #1787
  • Fixed #1768 by @Razican in #1820
  • Fix string.prototype methods and add static string methods by @jevancc in #1123
  • Handle allocation errors by @y21 in #1850
  • Fix wasm use outside browsers by @Razican in #1846
  • Add assertion to check that a break label is identified at compile-time by @VTCAKAVSMoACE in #1852
  • Correct reference error message by @aaronmunsters in #1855
  • Fixing main branch workflows by @Razican in #1858
  • Correct pop_on_return behaviour by @VTCAKAVSMoACE in #1853
  • Fix equality between objects and undefined or null by @HalidOdat in #1872
  • Removing the panic in favour of an error result by @Razican in #1874
  • Make Object.getOwnPropertyDescriptors spec compliant by @HalidOdat in #1876
  • Make Error and %NativeError% spec compliant by @HalidOdat in #1879
  • Fix Number.prototype.toString when passing undefined as radix by @HalidOdat in #1877
  • Cleanup vm stack on function return by @raskad in #1880
  • %NativeError%.[[prototype]] should be Error constructor by @HalidOdat in #1883
  • Make StringToNumber spec compliant by @HalidOdat in #1881
  • Fix PropertyKey to JsValue conversion by @HalidOdat in #1886
  • Make iterator spec complaint by @HalidOdat in #1889
  • Implement Number.parseInt and Number.parseFloat by @HalidOdat in #1894
  • Fix unreachable panics in compile_access by @VTCAKAVSMoACE in #1861
  • Continue panic fixes by @VTCAKAVSMoACE in #1896
  • Deny const declarations without initializer inside for loops by @jedel1043 in #1903
  • Fix try/catch/finally related bugs and add tests by @jedel1043 in #1901
  • Compile StatementList after parse passes on negative tests by @raskad in #1906
  • Prevent breaks without loop or switch from causing panics by @VTCAKAVSMoACE in #1860
  • Fix postfix increment and decrement return values by @raskad in #1913

Internal Improvements

  • Rewrite initialization of builtins to use the BuiltIn trait by @jedel1043 in #1586
  • Unify object creation with empty and from_proto_and_data methods by @jedel1043 in #1567
  • VM Tidy Up by @jasonwilliams in #1610
  • Fix master refs to main by @jasonwilliams in #1637
  • Refresh vm docs and fix bytecode trace output by @raskad #1921
  • Change type of object prototypes to Option<JsObject> by @jedel1043 in #1640
  • Refactor Function internal methods and implement BoundFunction objects by @jedel1043 in #1583
  • change that verbosity comparison to > 2 by @praveenbakkal in #1680
  • Respect rust 1.56 by @RageKnify in #1681
  • Add bors to CI by @RageKnify in #1684
  • Adding VM conformance output to PR checks by @Razican in #1685
  • Start removing non-VM path by @jasonwilliams in #1747
  • Using upstream benchmark action by @Razican in #1753
  • Fix bors hanging by @RageKnify in #1767
  • add more timers on object functions by @jasonwilliams in #1775
  • Update the PR benchmarks action by @Razican in #1774
  • General code clean-up and new lint addition by @Razican in #1809
  • Reduced the size of AST nodes by @Razican in #1821
  • Using the new formatting arguments from Rust 1.58 by @Razican in #1834
  • Rework RegExp struct to include bitflags field by @aaronmunsters in #1837
  • Ignore wastefull RegExp tests by @raskad in #1840
  • Refactor the environment for runtime performance by @raskad in #1829
  • Refactor mapped Arguments object by @raskad in #1849
  • Fixed dependabot for submodule by @Razican in #1856
  • Refactorings for Rust 1.59 by @RageKnify in #1867
  • Removing internal deprecated functions by @HalidOdat in #1854
  • Remove toInteger and document the string builtin by @jedel1043 in #1884
  • Extract Intrinsics struct from Context and cleanup names by @jedel1043 in #1890

Full Changelog: https://github.com/boa-dev/boa/compare/v0.13...v0.14

0.13.0 (2021-09-30) - Many new features and refactors

Feature Enhancements:

  • FEATURE #1526: Implement ComputedPropertyName for accessor properties in ObjectLiteral (@raskad)
  • FEATURE #1365: Implement splice method (@neeldug)
  • FEATURE #1364: Implement spread for objects (@FrancisMurillo)
  • FEATURE #1525: Implement Object.preventExtensions() and Object.isExtensible() (@HalidOdat)
  • FEATURE #1508: Implement Object.values() (@HalidOdat)
  • FEATURE #1332: Implement Array.prototype.sort (@jedel1043)
  • FEATURE #1417: Implement Object.keys and Object.entries (@skyne98)
  • FEATURE #1406: Implement destructuring assignments (@raskad)
  • FEATURE #1469: Implement String.prototype.replaceAll (@raskad)
  • FEATURE #1442: Implement closure functions (@HalidOdat)
  • FEATURE #1390: Implement RegExp named capture groups (@raskad)
  • FEATURE #1424: Implement Symbol.for and Symbol.keyFor (@HalidOdat)
  • FEATURE #1375: Implement at method for string (@neeldug)
  • FEATURE #1369: Implement normalize method (@neeldug)
  • FEATURE #1334: Implement Array.prototype.copyWithin (@jedel1043)
  • FEATURE #1326: Implement get RegExp[@@species] (@raskad)
  • FEATURE #1314: Implement RegExp.prototype [ @@search ] ( string ) (@raskad)
  • FEATURE #1451: Feature prelude module (@HalidOdat)
  • FEATURE #1523: Allow moving NativeObject variables into closures as external captures (@jedel1043)

Bug Fixes:

  • BUG #1521: Added "js" feature for getrandom for WebAssembly builds (@Razican)
  • BUG #1528: Always return undefined from functions that do not return (@raskad)
  • BUG #1518: Moving a JsObject inside a closure caused a panic (@jedel1043)
  • BUG #1502: Adjust EnumerableOwnPropertyNames to use all String type property keys (@raskad)
  • BUG #1415: Fix panic on bigint size (@neeldug)
  • BUG #1477: Properly handle NaN in new Date() (@raskad)
  • BUG #1449: Make Array.prototype methods spec compliant (@HalidOdat)
  • BUG #1353: Make Array.prototype.concat spec compliant (@neeldug)
  • BUG #1384: bitwise not operation (spec improvements) (@neeldug)
  • BUG #1374: Match and regexp construct fixes (@neeldug)
  • BUG #1366: Use lock for map iteration (@joshwd36)
  • BUG #1360: Adjust a comment to be next to the correct module (@teymour-aldridge)
  • BUG #1349: Fixes Array.protoype.includes (@neeldug)
  • BUG #1348: Fixes unshift maximum size (@neeldug)
  • BUG #1339: Scripts should not be considered in a block (@macmv)
  • BUG #1312: Fix display for nodes (@macmv)
  • BUG #1347: Fix stringpad abstract operation (@neeldug)
  • BUG #1584: Refactor the Math builtin object (spec compliant) (@jedel1043)
  • BUG #1535: Refactor JSON.parse (@raskad)
  • BUG #1572: Refactor builtin Map intrinsics to follow more closely the spec (@jedel1043)
  • BUG #1445: improve map conformance without losing perf (@neeldug)
  • BUG #1488: Date refactor (@raskad)
  • BUG #1463: Return function execution result from constructor if the function returned (@raskad)
  • BUG #1434: Refactor regexp costructor (@raskad)
  • BUG #1350: Refactor / Implement RegExp functions (@RageKnify) (@raskad)
  • BUG #1331: Implement missing species getters (@raskad)

Internal Improvements:

0.12.0 (2021-06-07) - Set, accessors, @@toStringTag and no more panics

Feature Enhancements:

Bug Fixes:

  • BUG #1071: Fix attribute configurable of the length property of arguments (@tofpie)
  • BUG #1073: Fixed spelling (@vishalsodani)
  • BUG #1072: Fix get/set as short method name in object (@tofpie)
  • BUG #1077: Fix panics from multiple borrows of Map (@joshwd36)
  • BUG #1079: Fix lexing escapes in string literal (@jevancc)
  • BUG #1075: Fix out-of-range panics of Date (@jevancc)
  • BUG #1084: Fix line terminator in string literal (@jevancc)
  • BUG #1110: Fix parsing floats panics and bugs (@jevancc)
  • BUG #1202: Fix a typo in gc.rs (@teymour-aldridge)
  • BUG #1201: Return optional value in to_json functions (@fermian)
  • BUG #1223: Update cli name in Readme (@sphinxc0re)
  • BUG #1175: Handle early errors for declarations in StatementList (@0x7D2B)
  • BUG #1270: Fix Context::register_global_function() (@HalidOdat)
  • BUG #1135: Fix of instructions.rs comment, to_precision impl and rfc changes (@NathanRoyer)
  • BUG #1272: Fix Array.prototype.filter (@tofpie & @Razican)
  • BUG #1280: Fix slice index panic in add_rest_param (@0x7D2B)
  • BUG #1284: Fix GcObject to_json mutable borrow panic (@0x7D2B)
  • BUG #1283: Fix panic in regex execution (@0x7D2B)
  • BUG #1286: Fix construct usage (@0x7D2B)
  • BUG #1288: Fixed Math.hypot.length bug (@moadmmh)
  • BUG #1285: Fix environment record panics (@0x7D2B)
  • BUG #1302: Fix VM branch (@jasonwilliams)

Internal Improvements:

0.11.0 (2021-01-14) - Faster Parsing & Better compliance

Feature Enhancements:

  • FEATURE #836: Async/Await parse (@Lan2u)
  • FEATURE #704: Implement for...of loops (@joshwd36)
  • FEATURE #770: Support for symbols as property keys for Object.defineProperty (@georgeroman)
  • FEATURE #717: Strict Mode Lex/Parse (@Lan2u)
  • FEATURE #800: Implement console crate feature - Put console object behind a feature flag (@HalidOdat)
  • FEATURE #804: Implement EvalError (@HalidOdat)
  • FEATURE #805: Implement Function.prototype.call (@RageKnify)
  • FEATURE #806: Implement URIError (@HalidOdat)
  • FEATURE #811: Implement spread operator using iterator (@croraf)
  • FEATURE #844: Allow UnaryExpression with prefix increment/decrement (@croraf)
  • FEATURE #798: Implement Object.getOwnPropertyDescriptor() and Object.getOwnPropertyDescriptors() (@JohnDoneth)
  • FEATURE #847: Implement Map.prototype.entries() (@croraf)
  • FEATURE #859: Implement spec compliant Array constructor (@georgeroman)
  • FEATURE #874: Implement Map.prototype.values and Map.prototype.keys (@croraf)
  • FEATURE #877: Implement Function.prototype.apply (@georgeroman)
  • FEATURE #908: Implementation of instanceof operator (@morrien)
  • FEATURE #935: Implement String.prototype.codePointAt (@devinus)
  • FEATURE #961: Implement the optional space parameter in JSON.stringify (@tofpie)
  • FEATURE #962: Implement Number.prototype.toPrecision (@NathanRoyer)
  • FEATURE #983: Implement Object.prototype.isPrototypeOf (@tofpie)
  • FEATURE #995: Support Numeric separators (@tofpie)
  • FEATURE #1013: Implement nullish coalescing (?? and ??=) (@tofpie)
  • FEATURE #987: Implement property accessors (@tofpie)
  • FEATURE #1018: Implement logical assignment operators (&&= and ||=) (@tofpie)
  • FEATURE #1019: Implement early errors for non-assignable nodes in assignment (@tofpie)
  • FEATURE #1020: Implement Symbol.toPrimitive (@tofpie)
  • FEATURE #976: Implement for..in (@tofpie)
  • FEATURE #1026: Implement String.prototype.split (@jevancc)
  • FEATURE #1047: Added syntax highlighting for numbers, identifiers and template literals (@Razican)
  • FEATURE #1003: Improve Unicode support for identifier names (@jevancc)

Bug Fixes:

  • BUG #782: Throw TypeError if regexp is passed to startsWith, endsWith, includes (@pt2121)
  • BUG #788: Fixing a duplicated attribute in test262 results (@Razican)
  • BUG #790: Throw RangeError when BigInt division by zero occurs (@JohnDoneth)
  • BUG #785: Fix zero argument panic in JSON.parse() (@JohnDoneth)
  • BUG #749: Fix Error constructors to return rather than throw (@RageKnify)
  • BUG #777: Fix cyclic JSON.stringify / primitive conversion stack overflows (@vgel)
  • BUG #799: Fix lexer span panic with carriage return (@vgel)
  • BUG #812: Fix 2 bugs that caused Test262 to fail (@RageKnify)
  • BUG #826: Fix tokenizing Unicode escape sequence in string literal (@HalidOdat)
  • BUG #825: calling "new" on a primitive value throw a type error (@dlemel8)
  • BUG #853 Handle invalid Unicode code point in the string literals (@jevancc)
  • BUG #870 Fix JSON stringification for fractional numbers (@georgeroman)
  • BUG #807: Make boa::parse emit error on invalid input, not panic (@georgeroman)
  • BUG #880: Support more number literals in BigInt's from string constructor (@georgeroman)
  • BUG #885: Fix BigInt.prototype.toString() radix checks (@georgeroman)
  • BUG #882: Fix (panic) remainder by zero (@georgeroman)
  • BUG #884: Fix some panics related to BigInt operations (@georgeroman)
  • BUG #888: Fix some panics in String.prototype properties (@georgeroman)
  • BUG #902: Fix Accessors panics (@HalidOdat)
  • BUG #959: Fix Unicode character escape sequence parsing (@tofpie)
  • BUG #964: Fix single line comment lexing with CRLF line ending (@tofpie)
  • BUG #919: Reduce the number of Array-related panics (@jakubfijalkowski)
  • BUG #968: Fix unit tests that can be failed due to daylight saving time (@tofpie)
  • BUG #972: Fix enumerable attribute on array length property (@tofpie)
  • BUG #974: Fix enumerable attribute on string length property (@tofpie)
  • BUG #981: Fix prototypes for Number, String and Boolean (@tofpie)
  • BUG #999: Fix logical expressions evaluation (@tofpie)
  • BUG #1001: Fix comparison with infinity (@tofpie)
  • BUG #1004: Fix panics surrounding Object.prototype.hasOwnProperty() (@HalidOdat)
  • BUG #1005: Fix panics surrounding Object.defineProperty() (@HalidOdat)
  • BUG #1021: Fix spread in new and call expressions (@tofpie)
  • BUG #1023: Fix attributes on properties of functions and constructors (@tofpie)
  • BUG #1017: Don't panic when function parameters share names (@AnnikaCodes)
  • BUG #1024: Fix delete when the property is not configurable (@tofpie)
  • BUG #1027: Supress regress errors on invalid escapes for regex (@jasonwilliams
  • BUG #1031: Fixed some extra regex panics (@Razican)
  • BUG #1049: Support overriding the arguments variable (@AnnikaCodes)
  • BUG #1050: Remove panic on named capture groups (@Razican)
  • BUG #1046: Remove a few different panics (@Razican)
  • BUG #1051: Fix parsing of arrow functions with 1 argument (@Lan2u)
  • BUG #1045: Add newTarget to construct (@tofpie)
  • BUG #659: Error handling in environment (@54k1)

Internal Improvements:

  • INTERNAL #735: Move exec implementations together with AST node structs (@georgeroman)
  • INTERNAL #724: Ignore tests for code coverage count (@HalidOdat)
  • INTERNAL #768 Update the benchmark Github action (@Razican)
  • INTERNAL #722: ConstructorBuilder, ObjectInitializer, cache standard objects and fix global object attributes (@HalidOdat)
  • INTERNAL #783: New test262 results format (This also reduces the payload size for the website) (@Razican)
  • INTERNAL #787: Refactor ast/node/expression into ast/node/call and ast/node/new (@croraf)
  • INTERNAL #802: Make Function.prototype a function (@HalidOdat)
  • INTERNAL #746: Add Object.defineProperties and handle props argument in Object.create (@dvtkrlbs)
  • INTERNAL #774: Switch from regex to regress for ECMA spec-compliant regex implementation (@neeldug)
  • INTERNAL #794: Refactor PropertyDescriptor (Improved performance) (@HalidOdat)
  • INTERNAL #824: [parser Expression] minor expression macro simplification (@croraf)
  • INTERNAL #833: Using unstable sort for sorting keys on to_json() for GC objects (@Razican)
  • INTERNAL #837: Set default-run to boa removing need for --bin (@RageKnify)
  • INTERNAL #841: Minor refactor and rename in eval() method (@croraf)
  • INTERNAL #840: fix(profiler): update profiler to match current measureme api (@neeldug)
  • INTERNAL #838: style(boa): minor cleanup (@neeldug)
  • INTERNAL #869: Updated cache in workflows (@Razican)
  • INTERNAL #873 Removed cache from MacOS builds (@Razican)
  • INTERNAL #835: Move Object internal object methods to GcObject (@HalidOdat)
  • INTERNAL #886: Support running a specific test/suite in boa_tester (@georgeroman)
  • INTERNAL #901: Added "unimplemented" syntax errors (@Razican)
  • INTERNAL #911: Change Symbol hash to u64 (@HalidOdat)
  • INTERNAL #912: Feature Context::register_global_property() (@HalidOdat)
  • INTERNAL #913: Added check to ignore semicolon in parser (@AngelOnFira)
  • INTERNAL #915: Improve lexer by make cursor iterate over bytes (@jevancc)
  • INTERNAL #952: Upgraded rustyline and test262 (@Razican)
  • INTERNAL #960: Fix unresolved links in documentation (@tofpie)
  • INTERNAL #979: Read file input in bytes instead of string (@tofpie)
  • INTERNAL #1014: StatementList: Rename statements to items (@AnnikaCodes)
  • INTERNAL #860: Investigation into ByteCode Interpreter (@jasonwilliams)
  • INTERNAL #1042: Add receiver parameter to object internal methods (@tofpie)
  • INTERNAL #1030: VM: Implement variable declaration (var, const, and let) (@AnnikaCodes)
  • INTERNAL #1010: Modify environment binding behaviour of function (@54k1)

0.10.0 (2020-09-29) - New Lexer & Test 262 Harness

Feature Enhancements:

  • FEATURE #524: Implement remaining Math methods (@mr-rodgers)
  • FEATURE #562: Implement remaining Number methods (@joshwd36)
  • FEATURE #536: Implement SyntaxError (@HalidOdat)
  • FEATURE #543: Implements Object.create builtin method (@croraf)
  • FEATURE #492: Switch to rustyline for the CLI (@IovoslavIovchev & @Razican)
  • FEATURE #595: Added syntax highlighting for strings in REPL (@HalidOdat)
  • FEATURE #586: Better error formatting and cli color (@HalidOdat)
  • FEATURE #590: Added keyword and operator colors and matching bracket validator to REPL (@HalidOdat)
  • FEATURE #555: Implement Array.prototype.reduce (@benjaminflin)
  • FEATURE #550: Initial implementation of Map() (@joshwd36 & @HalidOdat)
  • FEATURE #579: Implement Array.prototype.reduceRight (@benjaminflin)
  • FEATURE #585: Implement Well-Known Symbols (@joshwd36)
  • FEATURE #589: Implement the comma operator (@KashParty)
  • FEATURE #341: Ability to create multiline blocks in boa shell (@HalidOdat)
  • FEATURE #252: Implement Date (@jcdickinson)
  • FEATURE #711: Add support for >>>= (@arpit-saxena)
  • FEATURE #549: Implement label statements (@jasonwilliams)
  • FEATURE #373: Introduce PropertyKey for field acces (@RageKnify)
  • FEATURE #627: Feature native class objects (NativeObject and Class traits) (@HalidOdat)
  • FEATURE #694: Feature gc module (@HalidOdat)
  • FEATURE #656: Feature Context (@HalidOdat)
  • FEATURE #673: Add #[track_caller] to GcObject methods that can panic (@HalidOdat)
  • FEATURE #661: Add documentation to GcObject methods (@HalidOdat)
  • FEATURE #662: Implement std::error::Error for GcObject borrow errors (@HalidOdat)
  • FEATURE #660: Make GcObject::contruct not take 'this' (@HalidOdat)
  • FEATURE #654: Move require_object_coercible to Value (@HalidOdat)
  • FEATURE #603: Index PropertyKey, Object iterators and symbol support (@HalidOdat)
  • FEATURE #637: Feature boa::Result<T> (@HalidOdat)
  • FEATURE #625: Moved value operations from Interpreter to Value (@HalidOdat)
  • FEATURE #638: Changed to Value::to_*int32 => Value::to_*32 (@HalidOdat)

Bug Fixes:

  • BUG #405: Fix json.stringify symbol handling (@n14little)
  • BUG #520: Fix all Value operations and add unsigned shift right (@HalidOdat)
  • BUG #529: Refactor exec/expression into exec/call and exec/new (@croraf)
  • BUG #510: [[Call]] calling an undefined method does not throw (@joshwd36)
  • BUG #493: Use correct exponential representation for rational values (@Tropid)
  • BUG #572: Spec Compliant Number.prototype.toString(), better Number object formating and -0 (@HalidOdat)
  • BUG #599: Fixed String.prototype.indexOf() bug, when the search string is empty (@HalidOdat)
  • BUG #615: Fix abstract relational comparison operators (@HalidOdat)
  • BUG #608: Debug::fmt Causes Causes a Stack Overflow (@jcdickinson)
  • BUG #532 [builtins - Object] Object.getPrototypeOf returning incorrectly (@54k1)
  • BUG #533 [exec - function] function.prototype doesn't have own constructor property pointing to this function (@54k1)
  • BUG #641 Test new_instance_should_point_to_prototype is not checked correctly (@54k1)
  • BUG #644 undefined constants panic on execution (@jcdickinson)
  • BUG #631: Unexpected result when applying typeof to undefined value (@jcdickinson)
  • BUG #667: Fix panic when calling function that mutates itself (@dvtkrlbs)
  • BUG #668: Fix clippy on Nightly (@dvtkrlbs)
  • BUG #582: Make String.prototype.repeat() ECMAScript specification compliant (@HalidOdat)
  • BUG #541: Made all Math methods spec compliant (@HalidOdat)
  • BUG #597: Made String.prototype.indexOf spec compliant. (@HalidOdat)
  • BUG #598: Made String.prototype.lastIndexOf() spec compliant (@HalidOdat)
  • BUG #583: Fix string prototype trim methods (@HalidOdat)
  • BUG #728: Fix bug when setting the length on String objects (@jasonwilliams)
  • BUG #710: Fix panic when a self mutating function is constructing an object (@HalidOdat)
  • BUG #699: Fix Value::to_json order of items in array (@sele9)
  • BUG #610: Fix: String.prototype.replace substitutions (@RageKnify)
  • BUG #645: Fix undefined constant expression evaluation (@jcdickinson)
  • BUG #643: Change default return type from null to undefined (@54k1)
  • BUG #642: Missing constructor field in ordinary functions (@54k1)
  • BUG #604: Missing __proto__ field in functions instances (@54k1)
  • BUG #561: Throw a TypeError when a non-object is called (@joshwd36)
  • BUG #748: Fix parse error throwing a TypeError, instead of SyntaxError (@iamsaquib8)
  • BUG #737: Make Object.toString() spec compliant (@RageKnify)

Internal Improvements:

0.9.0 (2020-07-03) - Move to Organisation, 78% faster execution time

Feature Enhancements:

  • FEATURE #414: Implement Number object constants (@Lan2u) (@HalidOdat)
  • FEATURE #345: Implement the optional replacer parameter in JSON.stringify( value[, replacer [, space] ] ) (@n14little)
  • FEATURE #480: Implement global Infinity property (@AnirudhKonduru)
  • FEATURE #410: Add support for the reviver function to JSON.parse (@abhijeetbhagat)
  • FEATURE #425: Specification compliant ToString (to_string) (@HalidOdat)
  • FEATURE #442: Added TypeError implementation (@HalidOdat)
  • FEATURE #450: Specification compliant ToBigInt (to_bigint) (@HalidOdat)
  • FEATURE #455: TemplateLiteral Basic lexer implementation (@croraf)
  • FEATURE #447: parseInt, parseFloat implementation (@Lan2u)
  • FEATURE #468: Add BigInt.asIntN() and BigInt.asUintN() functions (@Tropid)
  • FEATURE #428: [Feature Request] - Create benchmark for Array manipulation (@abhijeetbhagat)
  • FEATURE #439: Implement break handling in switch statements (@Lan2u)
  • FEATURE #301: Implementing the switch statement in the new parser (@Lan2u)
  • FEATURE #120: Implement globalThis (@zanayr)
  • FEATURE #513: Implement Object.is() method (@tylermorten)
  • FEATURE #481: Implement global undefined property (@croraf)

Bug Fixes:

  • BUG #412: Fixed parsing if statement without else block preceded by a newline (@HalidOdat)
  • BUG #409: Fix function object constructable/callable (@HalidOdat)
  • BUG #403 Value::to_json() does not handle undefined correctly (@n14little)
  • BUG #443: HasOwnProperty should call GetOwnProperty and not GetProperty (@n14little)
  • BUG #210: builtinfun.length undefined (@Croraf)
  • BUG #466: Change ToPrimitive() (to_primitive()) hint to be an enum, instead of string (@HalidOdat)
  • BUG #421: NaN is lexed as a number, not as an identifier (@croraf)
  • BUG #454: Function declaration returns the function, it should return undefined (@croraf)
  • BUG #482: Field access should propagate the exception (Err(_)) (@neeldug)
  • BUG #463: Use of undefined variable should throw an error (@croraf)
  • BUG #502: Fixed global objects initialization order (@HalidOdat)
  • BUG #509: JSON.stringify(undefined) panics (@n14little)
  • BUG #514: Clean up Math Methods (@n14little)
  • BUG #511: [Call] Usage of "this" in methods is not supported (@jasonwilliams)

Internal Improvements

0.8.0 (2020-05-23) - BigInt, Modularized Parser, Faster Hashing

v0.8.0 brings more language implementations, such as do..while, function objects and also more recent EcmaScript additions, like BigInt. We have now moved the Web Assembly build into the wasm package, plus added a code of conduct for those contributing.

The parser has been even more modularized in this release making it easier to add new parsing rules.

Boa has migrated it's object implemention to FXHash which brings much improved results over the built-in Rust hashmaps (at the cost of less DOS Protection).

Feature Enhancements:

Bug fixes:

  • BUG #308: Assignment operator not working in tests (a = a +1) (@ptasz3k)
  • BUG #322: Benchmarks are failing in master (@Razican)
  • BUG #325: Put JSON functions on the object, not the prototype (@coolreader18)
  • BUG #331: We only get Const::Num, never Const::Int (@HalidOdat)
  • BUG #209: Calling new Array with 1 argument doesn't work properly (@HalidOdat)
  • BUG #266: Panic assigning named function to variable (@Razican)
  • BUG #397: fix NaN is lexed as identifier, not as a number (@attliaLin)
  • BUG #362: Remove Monaco Editor Webpack Plugin and Manually Vendor Editor Workers (@subhankar-panda)
  • BUG #406: Dependency Upgrade (@Razican)
  • BUG #407: String() wasn't defaulting to empty string on call (@jasonwilliams)
  • BUG #404: Fix for 0 length new String(@tylermorten)

Code Of Conduct:

  • COC #384: Code of conduct added (@Razican)

Security:

  • SEC #391: run security audit daily at midnight. (@n14little)

# 0.7.0 (2020-04-13) - New Parser is 67% faster

v0.7.0 brings a REPL, Improved parser messages and a new parser! This is now the default behaviour of Boa, so running Boa without a file argument will bring you into a javascript shell. Tests have also been moved to their own files, we had a lot of tests in some modules so it was time to separate.

New Parser

Most of the work in this release has been on rewriting the parser. A big task taken on by HalidOdat, Razican and myself.

The majority of the old parser was 1 big function (called parse) which had some pattern matching on each token coming in. The easy branches could generate expressions (which were basically AST Nodes), the more involved branches would recursively call into the same function, until eventually you had an expression generated.

This only worked so far, eventually debugging parsing problems were difficult, also more bugs were being raised against the parser which couldn't be fixed.

We decided to break the parser into more of a state-machine. The initial decision for this was inspired by Fedor Indutny who did a talk at (the last) JSConf EU about how he broke up the old node-parser to make it more maintanable. He goes into more detail here https://www.youtube.com/watch?v=x3k_5Mi66sY&feature=youtu.be&t=530

The new parser has functions to match the states of parsing in the spec. For example https://tc39.es/ecma262/#prod-VariableDeclaration has a matching function read_variable_declaration. This not only makes it better to maintain but easier for new contributors to get involed, as following the parsing logic of the spec is easier than before.

Once finished some optimisations were added by HalidOdat to use references to the tokens instead of cloning them each time we take them from the lexer. This works because the tokens live just as long as the parser operations do, so we don't need to copy the tokens. What this brings is a huge performance boost, the parser is 67% faster than before!

Parser Improvement

Feature enhancements:

  • FEATURE #281: Rebuild the parser (@jasonwilliams, @Razican, @HalidOdat)
  • FEATURE #278: Added the ability to dump the token stream or ast in bin. (@HalidOdat)
  • FEATURE #253: Implement Array.isArray (@cisen)
  • FEATURE Switch to normal output instead of debugged output (stdout/stdout) (@jasonwilliams)
  • FEATURE #258: Moved test modules to their own files (@Razican)
  • FEATURE #267: Add print & REPL functionality to CLI (@JohnDoneth)
  • FEATURE #268: Addition of forEach() (@jasonwilliams) (@xSke)
  • FEATURE #262: Implement Array.prototype.filter (@Nickforall)
  • FEATURE #261: Improved parser error messages (@Razican)
  • FEATURE #277: Add a logo to the project (@HalidOdat)
  • FEATURE #260: Add methods with f64 std equivelant to Math object (@Nickforall)

Bug fixes:

  • BUG #249: fix(parser): handle trailing comma in object literals (@gomesalexandre)
  • BUG #244: Fixed more Lexer Panics (@adumbidiot)
  • BUG #256: Fixed comments lexing (@Razican)
  • BUG #251: Fixed empty returns (@Razican)
  • BUG #272: Fix parsing of floats that start with a zero (@Nickforall)
  • BUG #240: Fix parser panic
  • BUG #273: new Class().method() has incorrect precedence

Documentation Updates:

  • DOC #297: Better user contributed documentation

0.6.0 (2020-02-14) - Migration to Workspace Architecture + lexer/parser improvements

The lexer has had several fixes in this release, including how it parses numbers, scientific notation should be improved. On top of that the lexer no longer panics on errors including Syntax Errors (thanks @adumbidiot), instead you get some output on where the error happened.

Moving to a workspace architecture

Boa offers both a CLI and a library, initially these were all in the same binary. The downside is those who want to embed boa as-is end up with all of the command-line dependencies. So the time has come to separate out the two, this is normal procedure, this should be analogous to ripgrep and the regex crate. Cargo has great support for workspaces, so this shouldn't be an issue.

Benchmarks

We now have benchmarks which run against master! Thanks to Github Actions these will run automatically a commit is merged.

Feature enhancements:

Bug fixes:

  • BUG #222: Fixed clippy errors (@IovoslavIovchev)
  • BUG #228: [lexer: single-line-comment] Fix bug when single line comment is last line of file (@croraf)
  • BUG #229: Replace error throwing with panic in "Lexer::next()" (@croraf)
  • BUG #232/BUG #238: Clippy checking has been scaled right back to just Perf and Style (@jasonwilliams)
  • BUG #227: Array.prototype.toString should be called by ES value (@cisen)
  • BUG #242: Fixed some panics in the lexer (@adumbidiot)
  • BUG #235: Fixed arithmetic operations with no space (@gomesalexandre)
  • BUG #245: Fixed parsing of floats with scientific notation (@adumbidiot)

# 0.5.1 (2019-12-02) - Rest / Spread (almost)

Feature enhancements:

  • FEATURE #151: Implement the Rest/Spread operator (functions and arrays).
  • FEATURE #193: Implement macro for setting builtin functions
  • FEATURE #211: Better Display support for all Objects (pretty printing)

# 0.5.0 (2019-11-06) - Hacktoberfest Release

Feature enhancements:

  • FEATURE #119: Introduce realm struct to hold realm context and global object.
  • FEATURE #89: Implement exponentiation operator. Thanks @arbroween
  • FEATURE #47: Add tests for comments in source code. Thanks @Emanon42
  • FEATURE #137: Use Monaco theme for the demo page
  • FEATURE #114: String.match(regExp) is implemented (@muskuloes)
  • FEATURE #115: String.matchAll(regExp) is implemented (@bojan88)
  • FEATURE #163: Implement Array.prototype.every() (@letmutx)
  • FEATURE #165: Implement Array.prototype.find() (@letmutx)
  • FEATURE #166: Implement Array.prototype.findIndex() (@felipe-fg)
  • FEATURE #39: Implement block scoped variable declarations (@barskern)
  • FEATURE #161: Enable obj[key] = value syntax.
  • FEATURE #179: Implement the Tilde operator (@letmutx)
  • FEATURE #189: Implement Array.prototype.includes (incl tests) (@simonbrahan)
  • FEATURE #180: Implement Array.prototype.slice (@muskuloes @letmutx)
  • FEATURE #152: Short Function syntax (no arguments)
  • FEATURE #164: Implement Array.prototype.fill() (@bojan88)
  • Array tests: Tests implemented for shift, unshift and reverse, pop and push (@muskuloes)
  • Demo page has been improved, new font plus change on input. Thanks @WofWca
  • FEATURE #182: Implement some Number prototype methods (incl tests) (@pop)
  • FEATURE #34: Number object and Constructore are implemented (including methods) (@pop)
  • FEATURE #194: Array.prototype.map (@IovoslavIovchev)
  • FEATURE #90: Symbol Implementation (@jasonwilliams)

Bug fixes:

  • BUG #113: Unassigned variables have default of undefined (@pop)
  • BUG #61: Clippy warnings/errors fixed (@korpen)
  • BUG #147: Updated object global
  • BUG #154: Correctly handle all whitespaces within the lexer
  • Tidy up Globals being added to Global Object. Thanks @DomParfitt

0.4.0 (2019-09-25)

v0.4.0 brings quite a big release. The biggest feature to land is the support of regular expressions. Functions now have the arguments object supported and we have a debugging section in the docs.

Feature enhancements:

  • FEATURE #6: Support for regex literals. (Big thanks @999eagle)
  • FEATURE #13: toLowerCase, toUpperCase, substring, substr and valueOf implemented (thanks @arbroween)
  • Support for arguments object within functions
  • StringData instead of PrimitieData to match spec
  • Native function signatures changed, operations added to match spec
  • Primitives can now be boxed/unboxed when methods are ran on them
  • Spelling edits (thanks @someguynamedmatt)
  • Ability to set global values before interpreter starts (thanks @999eagle)
  • Assign operators implemented (thanks @oll3)

Bug fixes:

  • BUG #57: Fixed issue with stackoverflow by implementing early returns.
  • Allow to re-assign value to an existing binding. (Thanks @oll3)

0.3.0 (2019-07-26)

  • UnexpectedKeyword(Else) bug fixed https://github.com/boa-dev/boa/issues/38
  • Contributing guide added
  • Ability to specify file - Thanks @callumquick
  • Travis fixes
  • Parser Tests - Thanks @Razican
  • Migrate to dyn traits - Thanks @Atul9
  • Added implementations for Array.prototype: concat(), push(), pop() and join() - Thanks @callumquick
  • Some clippy Issues fixed - Thanks @Razican
  • Objects have been refactored to use structs which are more closely aligned with the specification
  • Benchmarks have been added
  • String and Array specific console.log formats - Thanks @callumquick
  • isPropertyKey implementation added - Thanks @KrisChambers
  • Unit Tests for Array and Strings - Thanks @GalAster
  • typo fix - Thanks @palerdot
  • dist cleanup, thanks @zgotsch

0.2.1 (2019-06-30)

Some String prototype methods are implemented. Thanks to @lennartbuit we have trim/trimStart/trimEnd added to the string prototype

Feature enhancements:

Bug fixes:

  • Plenty

0.2.0 (2019-06-10)

Working state reached

  • Tests on the lexer, conforms with puncturators and keywords from TC39 specification
  • wasm-bindgen added with working demo in Web Assembly
  • snapshot of boa in a working state for the first time