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wasmasc

AssemblyScript WebAssembly plugin for wasmrun.

About​

wasmasc compiles AssemblyScript projects (TypeScript-like syntax) to WebAssembly for wasmrun's Server Mode, working with whichever JavaScript package manager the project already uses.

Crates.io Version

Install​

wasmrun plugin install wasmasc

Requirements:

  • Node.js runtime
  • asc (the AssemblyScript compiler), installed globally
  • Optional: npm, yarn, pnpm, or bun (auto-detected; npm is the fallback)

Usage​

Once installed, wasmrun auto-detects AssemblyScript projects from an AssemblyScript dependency in package.json or the standard assembly/ directory of .ts sources:

# Compile and serve with the dev server
wasmrun ./my-asc-project --watch

# Compile only
wasmrun compile ./my-asc-project

# Plugin management
wasmrun plugin info wasmasc
wasmrun plugin update wasmasc

What It Covers​

  • Direct asc compilation of AssemblyScript to WASM
  • Package manager detection: npm, yarn, pnpm, and bun workflows
  • Three optimization levels: debug, release, and size
  • Live reload: watch mode recompilation through wasmrun's dev server
  • Project auto-detection from package.json and lockfiles

What It Doesn't Cover​

  • Web application packaging: outside AssemblyScript's scope; the plugin produces WASM modules only
  • Full TypeScript: AssemblyScript is a strict subset of TypeScript compiled ahead of time; arbitrary TS code and npm libraries won't compile
  • Running WASM: execution is handled by wasmrun, not the plugin

See Also​