Spawn a SpiderMonkey shell as a child process.

ESM -> WebAssembly Component creator, via a SpiderMonkey JS engine embedding

convert ASTs between Shift and SpiderMonkey formats

Helpers for converting back and forth between esprima/SpiderMonkey ASTs and JavaScript objects.

confirm that a SpiderMonkey format AST represents an ECMAScript program

ESM -> WebAssembly Component creator, via a SpiderMonkey JS engine embedding

WebAssembly Promise-API polyfill for GJS — wraps the synchronous Module/Instance constructors that work in SpiderMonkey 128+.

SpiderMonkey JavaScript engine logo

JS fuzzer for generative testing of parsers that implement the SpiderMonkey Reflect.parse API

An interactive visualizer for the SpiderMonkey Ion compiler backend. For more information about the design and motivation, see the [blog post](https://spidermonkey.dev/blog/2025/10/28/iongraph-web.html).

Node.js in a browser tab. A complete JavaScript runtime powered by SpiderMonkey WASI.

Cross-engine benchmark runner for comparing JavaScript implementations across Node, Bun, V8, SpiderMonkey, JavaScriptCore and more

GTA Connected TypeScript type definitions & runtime utilities for GTA III / Vice City / San Andreas / IV (SpiderMonkey JS)

GTA Connected server toolkit for Node.js — JSON config, multi-resource builder, SpiderMonkey bundler, server process manager, standalone export

Convert Traceur AST to Spidermonkey AST.

Super powers for the SpiderMonkey Parser API

Phase D-2 POC: GJS-compatible loader for the lightningcss WASM bundle. Re-exports the `lightningcss-wasm` npm package's transform/bundle/bundleAsync API on top of SpiderMonkey 140's synchronous `new WebAssembly.Module/Instance` constructors. Reads the .wa

A library for transforming Esprima/SpiderMonkey ASTs.

JavaScript parser, mangler/compressor and beautifier toolkit

Lexical ordering of property names per Esprima AST type