dart_monty_wasm #

Pure Dart web WASM implementation of dart_monty using dart:js_interop and @pydantic/monty. Runs the Monty Python interpreter in a Web Worker to avoid Chrome's synchronous WASM compile-size limit.

This package has no Flutter dependency and can be used in any Dart web project.

• Flutter apps should import dart_monty instead — the federated plugin selects the correct backend automatically.
• Pure Dart web projects can depend on this package directly to run Python via WASM in the browser.

Architecture #

Dart (compiled to JS) -> MontyWasm (dart:js_interop)
  -> DartMontyBridge (monty_glue.js)
    -> Web Worker (dart_monty_worker.js)
      -> @pydantic/monty WASM (NAPI-RS)

Key Classes #

Requirements #

The web server must send COOP/COEP headers for SharedArrayBuffer support:

Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy: require-corp

See the main dart_monty repository for full documentation.