flutter_wasm_interop 0.0.2+3

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flutter_wasm_interop #

A new Flutter package to access WebAssembly Modules in Flutter.

Basic Idea is to call into WASM in web directly and desktop and mobile will call in to WASM with Wasmer via FFI.

Online Demo: https://rodydavis.github.io/flutter_wasm_interop/

Platforms #

[X] - Web

[] - MacOS

[] - Windows

[] - Linux

[] - iOS

[] - Android

[0.0.1] - TODO: Add release date. #

  • TODO: Describe initial release.


import 'package:flutter/material.dart';
import 'package:flutter_wasm_interop/flutter_wasm_interop.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData.light(),
      darkTheme: ThemeData.dark(),
      home: MyHomePage(title: 'Flutter Demo Home Page'),

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  _MyHomePageState createState() => _MyHomePageState();

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  WasmLoader _wasm;

  void initState() {
    _wasm = WasmLoader.fromAssets('assets/add.wasm');
    _wasm.init().then((ready) {
      if (mounted) setState(() {});

  void _incrementCounter() {
    if (_wasm != null) {
      if (mounted)
        setState(() {
          _counter = _wasm.functionParam('add_one', _counter) as int;

  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
              'You have pushed the button this many times:',
              style: Theme.of(context).textTheme.headline4,
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  flutter_wasm_interop: ^0.0.2+3

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:flutter_wasm_interop/flutter_wasm_interop.dart';
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Learn more about scoring.

We analyzed this package on Apr 7, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.6
  • Flutter: 1.12.13+hotfix.8

Health issues and suggestions

Document public APIs. (-1 points)

7 out of 7 API elements have no dartdoc comment.Providing good documentation for libraries, classes, functions, and other API elements improves code readability and helps developers find and use your API.

Maintenance suggestions

The package description is too short. (-20 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.

Package is pre-v0.1 release. (-10 points)

While nothing is inherently wrong with versions of 0.0.*, it might mean that the author is still experimenting with the general direction of the API.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
wasm_interop ^1.0.0-dev.1.0 1.0.0-dev.1.0
Transitive dependencies
collection 1.14.11 1.14.12
js 0.6.1+1
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies