TypeScriptで「Element implicitly has an 'any' type because expression of type 'string' can't be used to index」エラー
JavaScript/Node.js/TypeScript
TypeScript
TypeScriptで「Element implicitly has an 'any' type because expression of type 'string' can't be used to index」が出る原因と解決法を解説。インデックスシグネチャ・Record型・ユニオン型キーの使い分けを紹介します。
2025-08-21