Tsconfig option to disable .tsx extension lookup in module resolution

Suggestion

Running tsc --traceResolution in my project I found that Typescript was looking up .tsx files for every module resolution. That's very inconvenient, first because .tsx extension serves a very specific domain, second because by elliminating hundreds or maybe thousands of (think of a really big project) unecessary stat() syscalls the build time would probably speed up a bit, or maybe considerably.

🔍 Search Terms

• tsx
• module resolution

✅ 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.

まず tsc --traceResolution を使って、.tsx ファイルに対する現在のモジュール解決プローブを確認します。モジュール解決のエントリポイントを追跡し、既存のデフォルトを変更せずにこれらのプローブを制御する tsconfig オプションの方法を特定します。完了の条件は、そのオプションを有効にしたときに .tsx の検索が抑制され、それ以外では通常の解決が変更されないことです。