It's base don vite-plugin-wasm which adds WebAssembly ESM integration (aka. Webpack's asyncWebAssembly) to Vite and support wasm-pack generated modules. In addition to vite-plugin-wasm functionalities, it provides subresource integrity check for Wasm modules.

npm install --save-dev github:ciphermode/vite-plugin-wasm-sri

import wasm from "vite-plugin-wasm-sri";

export default defineConfig({
  plugins: [
    wasm(),
  ]
});