Class property with auto-accessors not compiles

[dardino]

Describe the bug

Hi, I have found this issue #11891 but my problem still remaining:

try to write something like this

export class Model {
  accessor counter: number = 0;
}

and run vite build, you obtain this result:

vite v5.4.10 building for production...
✓ 7 modules transformed.
x Build failed in 1.15s
error during build:
src/model.ts (2:11): Unexpected token `counter`. Expected * for generator, private key, identifier or async (Note that you need plugins to import files that are not JavaScript)
file: /home/projects/accessor-class-field-not-supported-by-vite/src/model.ts:2:11

1: export class Model {
2:   accessor counter: number = 0;
              ^
3: }

    at Module.getRollupError (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/parseAst.js:558:41)
    at ParseError.initialise (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:13306:41)
    at convertNode (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:15017:10)
    at convertProgram (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:14260:12)
    at Module.setSource (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:16003:24)
    at async ModuleLoader.addModuleSource (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:19881:13)
 ELIFECYCLE  Command failed with exit code 1.

Stackblitz demo: https://stackblitz.com/edit/accessor-class-field-not-supported-by-vite?file=src%2Fmodel.ts

EsBuild playground: https://esbuild.github.io/try/#dAAwLjI0LjAAewogIGxvYWRlcjogJ3RzJywKICB0YXJnZXQ6ICJFUzIwMjQiLAp9AGZ1bmN0aW9uIGRlY28oKSB7fQoKY2xhc3MgUHJvdmEgewogIGFjY2Vzc29yIGN1c3RvbTogc3RyaW5nID0gIiI7Cn0

Reproduction

https://stackblitz.com/edit/accessor-class-field-not-supported-by-vite?file=src%2Fmodel.ts

Steps to reproduce

open https://stackblitz.com/edit/accessor-class-field-not-supported-by-vite?file=src%2Fmodel.ts and look the error in the Terminal after the build

System Info

System:
    OS: Linux 5.15 Ubuntu 24.04.1 LTS 24.04.1 LTS (Noble Numbat)
    CPU: (8) x64 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
    Memory: 8.62 GB / 15.49 GB
    Container: Yes
    Shell: 5.2.21 - /bin/bash
  Binaries:
    Node: 22.1.0 - ~/.nvm/versions/node/v22.1.0/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.9.0 - ~/.nvm/versions/node/v22.1.0/bin/npm
    pnpm: 9.12.3 - ~/.local/share/pnpm/pnpm
  Browsers:
    Chrome: 129.0.6668.89
  npmPackages:
    vite: ^5.4.10 => 5.4.10

Used Package Manager

pnpm

Logs

~/projects/accessor-class-field-not-supported-by-vite
❯ vite build --debug
  vite:config bundled config file loaded in 2265.07ms +0ms
{
  __APP_ENV__: undefined,
  __APP_VERSION__: '"0.0.0"',
  __APP_NAME__: '"vite-typescript-starter"'
}
  vite:config using resolved config: {
  vite:config   define: {
  vite:config     __APP_ENV__: undefined,
  vite:config     __APP_VERSION__: '"0.0.0"',
  vite:config     __APP_NAME__: '"vite-typescript-starter"'
  vite:config   },
  vite:config   build: {
  vite:config     target: 'ES2020',
  vite:config     cssTarget: 'ES2020',
  vite:config     outDir: 'dist',
  vite:config     assetsDir: 'assets',
  vite:config     assetsInlineLimit: 4096,
  vite:config     cssCodeSplit: true,
  vite:config     sourcemap: false,
  vite:config     rollupOptions: {},
  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   configFile: '/home/projects/accessor-class-field-not-supported-by-vite/vite.config.ts',
  vite:config   configFileDependencies: [
  vite:config     '/home/projects/accessor-class-field-not-supported-by-vite/package.json',
  vite:config     '/home/projects/accessor-class-field-not-supported-by-vite/vite.config.ts'
  vite:config   ],
  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     build: {}
  vite:config   },
  vite:config   root: '/home/projects/accessor-class-field-not-supported-by-vite',
  vite:config   base: '/',
  vite:config   decodedBase: '/',
  vite:config   rawBase: '/',
  vite:config   resolve: {
  vite:config     mainFields: [ 'browser', 'module', 'jsnext:main', 'jsnext' ],
  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: [],
  vite:config     preserveSymlinks: false,
  vite:config     alias: [ [Object], [Object] ]
  vite:config   },
  vite:config   publicDir: '/home/projects/accessor-class-field-not-supported-by-vite/public',
  vite:config   cacheDir: '/home/projects/accessor-class-field-not-supported-by-vite/node_modules/.vite',
  vite:config   command: 'build',
  vite:config   mode: 'production',
  vite:config   ssr: {
  vite:config     target: 'node',
  vite:config     optimizeDeps: { noDiscovery: true, esbuildOptions: [Object] }
  vite:config   },
  vite:config   isWorker: false,
  vite:config   mainConfig: null,
  vite:config   bundleChain: [],
  vite:config   isProduction: true,
  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: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   css: { lightningcss: undefined },
  vite:config   esbuild: { jsxDev: false },
  vite:config   server: {
  vite:config     preTransformRequests: true,
  vite:config     sourcemapIgnoreList: [Function: isInNodeModules$1],
  vite:config     middlewareMode: false,
  vite:config     fs: {
  vite:config       strict: true,
  vite:config       allow: [Array],
  vite:config       deny: [Array],
  vite:config       cachedChecks: undefined
  vite:config     }
  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: '/home/projects/accessor-class-field-not-supported-by-vite',
  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_/home/projects/accessor-class-field-not-supported-by-vite' => {
  vite:config       dir: '/home/projects/accessor-class-field-not-supported-by-vite',
  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   optimizeDeps: {
  vite:config     holdUntilCrawlEnd: true,
  vite:config     esbuildOptions: { preserveSymlinks: false }
  vite:config   },
  vite:config   worker: { format: 'iife', plugins: '() => plugins', rollupOptions: {} },
  vite:config   appType: 'spa',
  vite:config   experimental: { importGlobRestoreExtension: false, hmrPartialAccept: false },
  vite:config   getSortedPlugins: [Function: getSortedPlugins],
  vite:config   getSortedPluginHooks: [Function: getSortedPluginHooks]
  vite:config } +22ms
vite v5.4.10 building for production...
✓ 7 modules transformed.
x Build failed in 1.08s
error during build:
src/model.ts (2:11): Unexpected token `counter`. Expected * for generator, private key, identifier or async (Note that you need plugins to import files that are not JavaScript)
file: /home/projects/accessor-class-field-not-supported-by-vite/src/model.ts:2:11

1: export class Model {
2:   accessor counter: number = 0;
              ^
3: }

    at Module.getRollupError (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/parseAst.js:558:41)
    at ParseError.initialise (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:13306:41)
    at convertNode (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:15017:10)
    at convertProgram (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:14260:12)
    at Module.setSource (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:16003:24)
    at async ModuleLoader.addModuleSource (file:///home/projects/accessor-class-field-not-supported-by-vite/node_modules/.pnpm/rollup@4.24.4/node_modules/rollup/dist/es/shared/node-entry.js:19881:13)

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• 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.
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• The provided reproduction is a minimal reproducible example of the bug.

[sapphi-red]

The workaround is to set esbuild.supported.decorators: false in the config.

export default defineConfig({
  esbuild: {
    supported: {
      decorators: false
    }
  }
})

It seems rollup does not support parsing auto-accessors and esbuild cannot enable auto-accessors transform separately from decorators.
Maybe we can set esbuild.supported.decorators: false by default, but I'm not sure about the impact of doing that.

[dardino]

Thanks for your solution, now it works perfectly.