AssemblyScript

AssemblyScript compiles a strict variant of TypeScript to WebAssembly using Binaryen. Current stable version is 0.28.x, released quarterly. It generates lean and mean WebAssembly modules while being just an npm install away. Key differentiators vs. Emscripten or Rust/Wasm: uses TypeScript-like syntax, has a dedicated standard library, and a runtime optimized for Wasm. Targets Node.js >=20 and npm >=10.