dart_monty_wasm 0.4.3

WASM backend for dart_monty, pure Dart bindings for Monty — a restricted sandboxed Python interpreter built in Rust.

dart_monty_wasm

Part of dart_monty — pure Dart bindings for Monty, a restricted, sandboxed Python interpreter built in Rust.

Live Demo | GitHub | Monty

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

Class	Description
WasmBindings	Abstract async interface for WASM operations
WasmBindingsJs	Concrete JS interop implementation via Web Worker
MontyWasm	MontyPlatform implementation using WasmBindings

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.