@r1-runtime/vite-plugin

Official Vite plugin for R1 — automates Rust→WASM compilation and Tauri import patching.

Features

• Automatic WASM Compilation: Compiles your src-tauri/ Rust code to WASM during build
• Import Patching: Rewrites Tauri API imports to use R1 shims
• Boot Script Injection: Automatically injects R1 runtime initialization
• Zero Config: Works out of the box with standard Tauri projects

Installation

npm install --save-dev @r1-runtime/vite-plugin

Usage

Add to your vite.config.ts:

import { defineConfig } from 'vite';
import react from '@vitejs/plugin-react';
import { r1Plugin } from '@r1-runtime/vite-plugin';

export default defineConfig({
  plugins: [
    r1Plugin({ rustSrc: './src-tauri' }),
    react(),
  ],
});

Options

interface R1PluginOptions {
  /**
   * Path to Rust source directory
   * @default './src-tauri'
   */
  rustSrc?: string;

  /**
   * WASM output directory (relative to rustSrc)
   * @default './target/wasm32-unknown-unknown/release'
   */
  wasmOut?: string;

  /**
   * Enable debug logging
   * @default false
   */
  debug?: boolean;
}

What It Does

1. Rust → WASM Compilation

During build, the plugin:

1. Runs cargo build --target wasm32-unknown-unknown --release
2. Runs wasm-bindgen to generate JavaScript bindings
3. Copies WASM files to your public/wasm/ directory

2. Import Patching

Rewrites Tauri imports to use R1 shims:

// Before:
import { invoke } from '@tauri-apps/api/core';
import { readTextFile } from '@tauri-apps/api/fs';

// After (automatically):
import { invoke } from '@r1-runtime/apis/core';
import { readTextFile } from '@r1-runtime/apis/fs';

3. Boot Script Injection

Injects R1 runtime initialization into your HTML:

<script type="module">
  import { R1Runtime } from '@r1-runtime/core';
  const runtime = new R1Runtime();
  await runtime.boot();
  await runtime.loadBackend('/wasm/your_app.wasm');
  window.dispatchEvent(new Event('r1:ready'));
</script>

Build Output

After running npm run build, your dist/ folder will contain:

dist/
├── index.html
├── assets/
│   ├── index-[hash].js
│   └── index-[hash].css
└── wasm/
    ├── your_app_bg.wasm
    └── your_app.js

Deploy this folder to any static hosting service!

Supported Tauri APIs

The plugin automatically patches imports for:

• @tauri-apps/api/core
• @tauri-apps/api/fs
• @tauri-apps/api/path
• @tauri-apps/api/event
• @tauri-apps/api/dialog
• @tauri-apps/api/os
• @tauri-apps/api/clipboard
• @tauri-apps/api/window
• @tauri-apps/plugin-store
• @tauri-apps/plugin-sql

Requirements

• Vite 5.0+
• Rust toolchain with wasm32-unknown-unknown target
• wasm-bindgen-cli installed

Troubleshooting

"wasm-bindgen not found"

Install it:

cargo install wasm-bindgen-cli

"target wasm32-unknown-unknown not found"

Add the target:

rustup target add wasm32-unknown-unknown

WASM file not found in build

Check that:

1. Your Cargo.toml has crate-type = ["cdylib"]
2. Rust code compiles without errors
3. rustSrc option points to correct directory

License

MIT © 2026 R1 Runtime Team