Show code comments in union types

Suggestion

When I use union types in Typescript, the annotations of the types are missing and cannot be given. I would like to be able to show some code its meaning with the help of annotation hints.

🔍 Search Terms

union types comments

✅ Viability Checklist

My suggestion meets these guidelines:

• This wouldn't be a breaking change in existing TypeScript/JavaScript code
• This wouldn't change the runtime behavior of existing JavaScript code
• This could be implemented without emitting different JS based on the types of the expressions
• This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
• This feature would agree with the rest of TypeScript's Design Goals.

⭐ Suggestion

playground

📃 Motivating Example

💻 Use Cases

リンクされた TypeScript Playground の例から始め、表示されるユニオン型注釈がどのように表現されているかを確認します。実装箇所とテスト箇所を特定する前に、想定されるコメント構文、影響を受けるツールの範囲、ユースケースを明確にします。ユニオンのメンバーに対する注釈を、出力される JavaScript を変更せずに記述して表示できれば完了です。