Bug - Package Publishing - Published Libraries should follow NPM dual module package standards

すべてのPatternFlyパッケージについて、issueに示されているパッケージメタデータのフィールドを確認し、その後、vitestで現在のモジュール解決の問題を再現します。まずNPM package-examplesとVite library-modeのリファレンスを確認してください。影響を受けるすべてのパッケージが標準のパッケージメタデータを通じてESMとCommonJSの両方をサポートすれば完了です。

PatternFly libraries should follow NPM standards for publishing dual module (CommonJS/ESModule) packages.

PatternFly packages have

  "main": "dist/js/index.js",
  "module": "dist/esm/index.js",
  "types": "dist/esm/index.d.ts",

This is a really early format when es modules were being initially developed and not supported by modern tooling.

NPM documentation links to this as the right way to handle dual module packages.

{
  "type": "module",
  "exports": {
    "import": "./index.mjs",
    "require": "./index.cjs"
  }
}

Modern tooling like vite builds libraries with a combination of both for compatibility.

{
  "name": "my-lib",
  "type": "module",
  "main": "./dist/my-lib.umd.cjs",
  "types": "./dist/my-lib.d.ts",
  "module": "./dist/my-lib.js",
  "exports": {
    ".": {
      "import": "./dist/my-lib.js",
      "require": "./dist/my-lib.umd.cjs"
    }
  }
}

This is currently blocking us from using vitest to test because it gets really confused. It tries to import the code as ESM but then is unhappy that the package is not marked as type "module". If we manually add type 'module', it then runs into some code that uses a 'require', which is not valid in the scope of a module.

PatternFly packages should support both ESM and CommonJS using NPM standards for better compatibility.

This affects all PF packages not just react-core.