importModuleSpecifier "shortest" does not choose shortest result among multiple matching paths aliases

🔎 Search Terms

importModuleSpecifier shortest paths multiple aliases, auto import paths overlapping alias, tryGetModuleNameFromPaths shortest

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about auto-import and paths

⏯ Playground Link

N/A — this is a language service auto-import behavior that requires a multi-file project with jsconfig/tsconfig paths

💻 Code

// jsconfig.json
{
  "compilerOptions": {
    "paths": {
      "@@/*": ["./*"],
      "@/*": ["./src/*"]
    }
  }
}

// src/services/foo.js
export function foo() {}

// src/index.js — trigger auto-import for `foo`

🙁 Actual behavior

Auto-import suggests @@/src/services/foo. The importModuleSpecifier: "shortest" preference does not influence the choice between two matching paths aliases. tryGetModuleNameFromPaths returns on the first matching key in iteration order without comparing alternatives.

🙂 Expected behavior

With importModuleSpecifier set to "shortest", auto-import should compare all matching aliases and suggest @/services/foo since it is shorter than @@/src/services/foo.

Additional information about the issue

Workaround is to reorder paths entries so the more specific alias appears first, relying on object key insertion order. This is fragile and undocumented.

言及されている tryGetModuleNameFromPaths エントリポイントから始め、jsconfig/tsconfig の paths 設定を使って複数ファイルの自動インポートのケースを再現します。一致するエイリアスがどのように選択されるかを追跡し、そのうえで、最短のものを優先することでオブジェクトキーの順序に依存せず短いエイリアスが選ばれることを確認します。