JS² compiles JavaScript to WebAssembly ahead-of-time, sandboxing untrusted modules in your supply chain – running in JS engines or standalone – no interpreter or engine bundled. Goal: 100% ECMAScript & NPM compatibility; Method: spec/test-driven agile team of agents against spec + 100.000 unit tests, passing 75.4% of test262 in a JS host, 43.8% standalone. Module sandboxing limits blast radius for supply chain attacks or AI generated code Lightweight with no bundled interpreter or engine, starting at 100 bytes Fast, typically being an order of magnitude or more faster than interpreters or engines without JIT embedded in the module Garbage Collection natively supported by Wasm 3.0, builtin and robust instead of avoiding or embedding Help us bringing this vision of a new substrate for running JavaScript as lightweight, composable modules to life – by reviewing, testing, contributing, or donating! js2.loopdive.com @loopdive #JavaScript #TypeScript #WebAssembly #sandboxing #security