Warn when package.json contains an invalid "type" value

What is the problem this feature will solve?

Valid (meaningful) values are:

• commonjs
• module

I had set CommonJS, and it behaves the same as if type was unset, which is so close to the actual commonjs behavior, that I thought I had set it correctly. But I kept having cases resulting in the MODULE_TYPELESS_PACKAGE_JSON warning, instead of failing hard.

Note that while tsconfig.js ignores case, the canonical version is CommonJS, so I never considered that I was using incorrect case.

What is the feature you are proposing to solve the problem?

Raise warning/error if "type" is set, but value is none of commonjs or module.

What alternatives have you considered?

No response

まず、Node.js が package.json の type フィールドを処理し、MODULE_TYPELESS_PACKAGE_JSON 警告を出力する箇所を追跡します。この issue ではソースファイルもテストも指定されていないため、最初にその経路と既存のカバレッジを把握してください。commonjs と module 以外の値に対して選択した警告またはエラーの動作を定義してテストし、これらの正規の値は維持してください。