404 error fetching bindings_wasm_bg.wasm when running rollup on the browser

[eltaiguer]

Describe the bug

Hi everyone, not sure if this is the correct place to post this, I already posted on Stack Overflow without luck.

I'm trying to use the package @rollup/browser on my project to generate a dynamic bundle as described here

I know it might sound as if this is not a vite issue, however when running the code I get the following errors:

My first question is, what exactly is the http://localhost:5175/node_modules/.vite/deps/bindings_wasm_bg.wasm file? Do I need to add a specific plugin for this file to exist?

Then there are other problems with the MIME type, which I think I already have a workaround for, and the last error in the screenshot I think it's probably related to the missing file.

Any suggestions about this?

Reproduction

https://github.com/eltaiguer/vite-rollup

Steps to reproduce

Run:
yarn install
yarn dev

Open the console and Click on the "run" button

System Info

System:
    OS: macOS 14.0
    CPU: (10) arm64 Apple M1 Pro
    Memory: 98.56 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 18.14.0 - ~/.nvm/versions/node/v18.14.0/bin/node
    Yarn: 1.22.19 - /opt/homebrew/bin/yarn
    npm: 9.3.1 - ~/.nvm/versions/node/v18.14.0/bin/npm
  Browsers:
    Chrome: 117.0.5938.149
    Safari: 17.0
  npmPackages:
    @vitejs/plugin-react: ^4.0.3 => 4.1.0 
    vite: ^4.4.5 => 4.4.11

Used Package Manager

yarn

Logs

$ tsc && vite build --debug
  vite:config bundled config file loaded in 14.76ms +0ms
  vite:config using resolved config: {
  vite:config   plugins: [
  vite:config     'vite:build-metadata',
  vite:config     'vite:watch-package-data',
  vite:config     'vite:pre-alias',
  vite:config     'alias',
  vite:config     'vite:react-babel',
  vite:config     'vite:react-refresh',
  vite:config     'vite:modulepreload-polyfill',
  vite:config     'vite:resolve',
  vite:config     'vite:html-inline-proxy',
  vite:config     'vite:css',
  vite:config     'vite:esbuild',
  vite:config     'vite:json',
  vite:config     'vite:wasm-helper',
  vite:config     'vite:worker',
  vite:config     'vite:asset',
  vite:config     'vite:wasm-fallback',
  vite:config     'vite:define',
  vite:config     'vite:css-post',
  vite:config     'vite:build-html',
  vite:config     'vite:worker-import-meta-url',
  vite:config     'vite:asset-import-meta-url',
  vite:config     'vite:force-systemjs-wrap-complete',
  vite:config     'commonjs',
  vite:config     'vite:data-uri',
  vite:config     'vite:dynamic-import-vars',
  vite:config     'vite:import-glob',
  vite:config     'vite:build-import-analysis',
  vite:config     'vite:esbuild-transpile',
  vite:config     'vite:terser',
  vite:config     'vite:reporter',
  vite:config     'vite:load-fallback'
  vite:config   ],
  vite:config   optimizeDeps: {
  vite:config     disabled: 'build',
  vite:config     force: undefined,
  vite:config     include: [ 'react', 'react/jsx-dev-runtime', 'react/jsx-runtime' ],
  vite:config     esbuildOptions: { preserveSymlinks: false }
  vite:config   },
  vite:config   build: {
  vite:config     target: [ 'es2020', 'edge88', 'firefox78', 'chrome87', 'safari14' ],
  vite:config     cssTarget: [ 'es2020', 'edge88', 'firefox78', 'chrome87', 'safari14' ],
  vite:config     outDir: 'dist',
  vite:config     assetsDir: 'assets',
  vite:config     assetsInlineLimit: 4096,
  vite:config     cssCodeSplit: true,
  vite:config     sourcemap: false,
  vite:config     rollupOptions: { onwarn: [Function: onwarn] },
  vite:config     minify: 'esbuild',
  vite:config     terserOptions: {},
  vite:config     write: true,
  vite:config     emptyOutDir: null,
  vite:config     copyPublicDir: true,
  vite:config     manifest: false,
  vite:config     lib: false,
  vite:config     ssr: false,
  vite:config     ssrManifest: false,
  vite:config     ssrEmitAssets: false,
  vite:config     reportCompressedSize: true,
  vite:config     chunkSizeWarningLimit: 500,
  vite:config     watch: null,
  vite:config     commonjsOptions: { include: [Array], extensions: [Array] },
  vite:config     dynamicImportVarsOptions: { warnOnError: true, exclude: [Array] },
  vite:config     modulePreload: { polyfill: true },
  vite:config     cssMinify: true
  vite:config   },
  vite:config   esbuild: { jsxDev: false, jsx: 'automatic', jsxImportSource: undefined },
  vite:config   resolve: {
  vite:config     mainFields: [ 'module', 'jsnext:main', 'jsnext' ],
  vite:config     browserField: true,
  vite:config     conditions: [],
  vite:config     extensions: [
  vite:config       '.mjs',  '.js',
  vite:config       '.mts',  '.ts',
  vite:config       '.jsx',  '.tsx',
  vite:config       '.json'
  vite:config     ],
  vite:config     dedupe: [ 'react', 'react-dom' ],
  vite:config     preserveSymlinks: false,
  vite:config     alias: [ [Object], [Object] ]
  vite:config   },
  vite:config   configFile: '/Users/jose/Projects/ikayzo/rollup-test/vite.config.ts',
  vite:config   configFileDependencies: [ '/Users/jose/Projects/ikayzo/rollup-test/vite.config.ts' ],
  vite:config   inlineConfig: {
  vite:config     root: undefined,
  vite:config     base: undefined,
  vite:config     mode: undefined,
  vite:config     configFile: undefined,
  vite:config     logLevel: undefined,
  vite:config     clearScreen: undefined,
  vite:config     optimizeDeps: { force: undefined },
  vite:config     build: {}
  vite:config   },
  vite:config   root: '/Users/jose/Projects/ikayzo/rollup-test',
  vite:config   base: '/',
  vite:config   rawBase: '/',
  vite:config   publicDir: '/Users/jose/Projects/ikayzo/rollup-test/public',
  vite:config   cacheDir: '/Users/jose/Projects/ikayzo/rollup-test/node_modules/.vite',
  vite:config   command: 'build',
  vite:config   mode: 'production',
  vite:config   ssr: {
  vite:config     format: 'esm',
  vite:config     target: 'node',
  vite:config     optimizeDeps: { disabled: true, esbuildOptions: [Object] }
  vite:config   },
  vite:config   isWorker: false,
  vite:config   mainConfig: null,
  vite:config   isProduction: true,
  vite:config   css: undefined,
  vite:config   server: {
  vite:config     preTransformRequests: true,
  vite:config     sourcemapIgnoreList: [Function: isInNodeModules],
  vite:config     middlewareMode: false,
  vite:config     fs: { strict: true, allow: [Array], deny: [Array] }
  vite:config   },
  vite:config   preview: {
  vite:config     port: undefined,
  vite:config     strictPort: undefined,
  vite:config     host: undefined,
  vite:config     https: undefined,
  vite:config     open: undefined,
  vite:config     proxy: undefined,
  vite:config     cors: undefined,
  vite:config     headers: undefined
  vite:config   },
  vite:config   envDir: '/Users/jose/Projects/ikayzo/rollup-test',
  vite:config   env: { BASE_URL: '/', MODE: 'production', DEV: false, PROD: true },
  vite:config   assetsInclude: [Function: assetsInclude],
  vite:config   logger: {
  vite:config     hasWarned: false,
  vite:config     info: [Function: info],
  vite:config     warn: [Function: warn],
  vite:config     warnOnce: [Function: warnOnce],
  vite:config     error: [Function: error],
  vite:config     clearScreen: [Function: clearScreen],
  vite:config     hasErrorLogged: [Function: hasErrorLogged]
  vite:config   },
  vite:config   packageCache: Map(1) {
  vite:config     'fnpd_/Users/jose/Projects/ikayzo/rollup-test' => {
  vite:config       dir: '/Users/jose/Projects/ikayzo/rollup-test',
  vite:config       data: [Object],
  vite:config       hasSideEffects: [Function: hasSideEffects],
  vite:config       webResolvedImports: {},
  vite:config       nodeResolvedImports: {},
  vite:config       setResolvedCache: [Function: setResolvedCache],
  vite:config       getResolvedCache: [Function: getResolvedCache]
  vite:config     },
  vite:config     set: [Function (anonymous)]
  vite:config   },
  vite:config   createResolver: [Function: createResolver],
  vite:config   worker: {
  vite:config     format: 'iife',
  vite:config     plugins: [
  vite:config       'vite:build-metadata',
  vite:config       'vite:watch-package-data',
  vite:config       'vite:pre-alias',
  vite:config       'alias',
  vite:config       'vite:modulepreload-polyfill',
  vite:config       'vite:resolve',
  vite:config       'vite:html-inline-proxy',
  vite:config       'vite:css',
  vite:config       'vite:esbuild',
  vite:config       'vite:json',
  vite:config       'vite:wasm-helper',
  vite:config       'vite:worker',
  vite:config       'vite:asset',
  vite:config       'vite:wasm-fallback',
  vite:config       'vite:define',
  vite:config       'vite:css-post',
  vite:config       'vite:build-html',
  vite:config       'vite:worker-import-meta-url',
  vite:config       'vite:asset-import-meta-url',
  vite:config       'vite:force-systemjs-wrap-complete',
  vite:config       'commonjs',
  vite:config       'vite:data-uri',
  vite:config       'vite:worker-post',
  vite:config       'vite:dynamic-import-vars',
  vite:config       'vite:import-glob',
  vite:config       'vite:build-import-analysis',
  vite:config       'vite:esbuild-transpile',
  vite:config       'vite:terser',
  vite:config       'vite:load-fallback'
  vite:config     ],
  vite:config     rollupOptions: {},
  vite:config     getSortedPlugins: [Function: getSortedPlugins],
  vite:config     getSortedPluginHooks: [Function: getSortedPluginHooks]
  vite:config   },
  vite:config   appType: 'spa',
  vite:config   experimental: { importGlobRestoreExtension: false, hmrPartialAccept: false },
  vite:config   getSortedPlugins: [Function: getSortedPlugins],
  vite:config   getSortedPluginHooks: [Function: getSortedPluginHooks]
  vite:config } +15ms
vite v4.4.11 building for production...
  vite:esbuild 12.54ms tsconfck init /Users/jose/Projects/ikayzo/rollup-test +0ms
transforming (1) index.html  vite:resolve 1.96ms bindings_wasm_bg.wasm -> /Users/jose/Projects/ikayzo/rollup-test/node_modules/@rollup/browser/dist/es/bindings_wasm_bg.wasm +0ms
✓ 35 modules transformed.
dist/index.html                                 0.46 kB │ gzip:   0.30 kB
dist/assets/react-35ef61ed.svg                  4.13 kB │ gzip:   2.14 kB
dist/assets/bindings_wasm_bg-48cddf5d.wasm  5,452.66 kB
dist/assets/index-d526a0c5.css                  1.42 kB │ gzip:   0.74 kB
dist/assets/index-334d7831.js                 459.30 kB │ gzip: 137.60 kB
✓ built in 844ms
✨  Done in 2.24s.

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[eltaiguer]

Update about this, I notice that when I run yarn build I see a bindings_was_bg.wasm file under the assets folder, however, I have no idea how is that file is being expected under node_modules

[curran]

I'm experiencing the same issue.

Here's a minimal reproduction repo: https://github.com/curran/rollup-v4-browser-vite-demo

In that repo:

• Running npm run dev fails
• Running npm run build does produce the WASM asset
• Running npm run preview works! The code runs and uses the correct WASM asset

This leads me to believe it is an issue isolated to the dev server setup.

Also, I was encountering a related issue around MIME types for the WASM asset, which I solved here curran/rollup-v4-browser-vite-demo#2 , but I'm not sure if this is a symptom of the underlying problem which is that Vite does not serve the file in dev at all, so of course the MIME type will be incorredt.

Here's a StackOverflow post about the same/similar error https://stackoverflow.com/questions/77276441/vite-react-wasm-errors-when-running-rollup-browser-side

I'm currently trying to figure out what to do for migrating to v4 to support the browser build of Rollup in a Vite-based app. Sharing my research so far here.

I reviewed the migration guide https://rollupjs.org/migration/ but nothing is mentioned there about WASM for the browser build. I also see that in https://github.com/rollup/rollup/blob/master/CHANGELOG.md#general-changes There is this hint:

The browser build now relies on a WASM artifact that needs to be provided as well (#5073)

I'm currently trying to decipher rollup/rollup#5073 to find out if there's anything we can do outside of Vite itself to make it work.

To summarize the issue, I see two possibilities:

• The Rollup browser build may not be using the right path for the WASM asset when running Vite's npm run dev.
• Vite may not be serving the file at the right path when running npm run dev.

Looking forward to solving this issue! Any clues would be greatly appreciated.

[sadn1ck]

what exactly is the http://localhost:5175/node_modules/.vite/deps/bindings_wasm_bg.wasm

That's how rollup bundles in the browser, using WASM: https://github.com/rollup/rollup/blob/master/browser/package.json#L23

To get it to run, add "@rollup/browser" to optimizeDeps.exclude, which prevents the prebundling and messing up of paths to the .wasm file.

See: https://stackblitz.com/edit/github-hqaxdk?file=vite.config.ts

[curran]

Amazing! Thank you so much! That works for me.

I've included the fix here https://github.com/curran/rollup-v4-browser-vite-demo/blob/main

[sapphi-red]

Duplicate of #8427