An independent Rust rewrite of QuickJS, targeting semantic feature parity with the official QuickJS 2026-06-04 release and its ES2025 behavior.
The unsafe-free engine is runnable but incomplete. Its strongest covered
slice is the shared ArrayBuffer/DataView/12-class TypedArray stack: resizable
buffers, fixed and length-tracking views, transfers, iteration, search,
mutation, sorting, species behavior, and the six Uint8Array base64/hex codecs.
Map, Set, WeakMap, WeakSet, WeakRef, and FinalizationRegistry also
have QuickJS-shaped constructors, protocols, weak lifetimes, and ordered
runtime jobs.
String.prototype.normalize uses the pinned QuickJS Unicode 17 data for NFC,
NFD, NFKC, and NFKD normalization.
The 122-tag global Test262 profile admits WeakMap, WeakSet, WeakRef, and
FinalizationRegistry alongside object rest, DataView, Proxy, optional
chaining, Iterator Helpers, globalThis, default parameters, and the
implemented binary-data and Promise surfaces through checksum-bound audits.
Its Test262 host provides real reentrant GC, recursive realm creation, and
defining-realm script evaluation. The last audited full vector is
65,254/102,037 with 65,406 runnable variants.
Modules, SharedArrayBuffer/Atomics, and broad built-in coverage remain
incomplete.
Pinned QuickJS is the test oracle, never a product dependency; detailed
bookkeeping lives in the status documents.
Open the browser playground →
— it runs this Rust engine's actual WebAssembly build, not host eval. The
playground is a pre-parity milestone, not a Feature Parity claim.
Rust 1.85 or newer is required.
git clone https://github.com/pocket-stack/quickjs-oxide.git
cd quickjs-oxide
./scripts/demo-42.sh # 42
cargo run --quiet --bin qjs -- --print-result -e \
'(function (a) { return a + 1; })(41)' # 42- Implementation status and milestone ledger
- Pinned Test262 progress baseline
- Parity acceptance contract
- Pinned upstream release
cargo test --locked --workspace --all-targets
./scripts/test-test262-weak-collections.sh
./scripts/test-test262-weak-collections-global.sh
./scripts/test-test262-weak-ref-finalization.sh
./scripts/test-test262-weak-ref-finalization-global.sh
./scripts/test-host-gc-reentrant-oracle.sh --oxide
./scripts/test-test262-host-gc.sh
./scripts/test-test262-host-gc-global.sh
./scripts/test-test262-create-realm.sh
./scripts/test-test262-eval-script.sh
./scripts/test-test262-realm-hosts-global.sh
./scripts/test-test262-string-normalize.sh
./scripts/test-test262-current-global.sh
./scripts/test-test262-full.sh
./scripts/test-web-playground.shMIT. Third-party notices are retained in NOTICE and LICENSES.