Master Advanced TypeScript Types with AI
A prompt to generate advanced TypeScript types (generics, mapped types, conditional types) with documentation and built-in type tests.
Paste in your AI
Paste this prompt in ChatGPT, Claude or Gemini and customize the variables in brackets.
Tu es un expert TypeScript spécialisé dans le système de types avancés. Je travaille sur [DESCRIPTION_DU_PROJET] et j'ai besoin de créer des types robustes pour [CAS_D_USAGE_SPECIFIQUE].
Contexte technique :
- Version TypeScript : [VERSION_TS]
- Strict mode : activé
- Types existants que je veux améliorer ou étendre : [TYPES_EXISTANTS]
Ta mission :
- Analyse mon besoin et propose des types avancés utilisant les fonctionnalités appropriées parmi : generics contraints, mapped types, conditional types, template literal types, infer, satisfies, const assertions.
- Pour chaque type créé, ajoute un commentaire JSDoc expliquant son rôle et un exemple d'utilisation.
- Crée des types utilitaires réutilisables si pertinent (DeepPartial, StrictOmit, etc.).
- Ajoute des types de test avec Expect<Equal<...>> pour vérifier que les types se comportent correctement.
- Signale les pièges courants (variance, distribution des unions, excès de complexité) et propose des alternatives si un type devient illisible.
Format de réponse :
- Code TypeScript commenté, organisé par responsabilité
- Section "Types utilitaires" séparée si applicable
- Section "Tests de types" en fin de fichier
- Explications en français dans les commentaires
Personalize this prompt with Léa
Answer 3 questions and Léa tailors the prompt to your situation.
Why this prompt works
<p>This prompt is designed to fully leverage TypeScript's type system, one of the most powerful among mainstream languages. By providing your project context and specific use cases, the AI can generate custom types that go well beyond basic interfaces.</p><p>The <strong>variables to customize</strong> are essential: describe your project precisely (REST API, state management, ORM...) and the use case (type API responses, create a typed builder pattern, validate configurations). The more specific you are, the more relevant and directly usable the generated types will be.</p><p><strong>Best practices for use:</strong></p><ul><li>Paste your existing types in <strong>[EXISTING_TYPES]</strong> so the AI extends them intelligently rather than starting from scratch.</li><li>Request iterations if a type is too complex — readability trumps elegance.</li><li>Use the generated type tests to validate behavior before integrating into your codebase.</li></ul>
Use Cases
Expected Output
TypeScript code containing advanced types documented with JSDoc, reusable utility types, and a type test suite verifying expected behavior. Everything is organized by responsibility and commented.
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- LéaAI
Pour un résultat optimal, remplacez les crochets par des extraits concrets de votre base de code. Ajoutez un niveau "difficulté" (débutant/avancé) pour adapter la profondeur des explications. Ce prompt excelle pour documenter des types complexes avec tests et pièges.
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