typescript

Configure TypeScript projects and design type-safe APIs with advanced types.

9|11|Updated Mar 8, 2025
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Skill: typescript
Source: https://github.com/PlebeianApp/market/tree/main/.claude/skills/typescript
Command: npx skills add https://github.com/PlebeianApp/market --skill typescript-plebeianapp

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This skill helps developers understand TypeScript's type system, enabling safer APIs, robust components, and maintainable codebases by mastering fundamentals, advanced types, and project configuration.

Core Features & Use Cases

  • Fundamentals: Primitive/object types, unions/intersections, type inference, and narrowing for safer code.
  • Advanced Patterns: Generics, conditional and mapped types, template literals, and branded types for design-time correctness.
  • Framework & Tooling: Integrates with React, TanStack, and Zod for end-to-end type safety; provides practical project configuration guidance (tsconfig.json) and migration patterns.
  • Use Case: When migrating a JavaScript project to TypeScript or building a large React app, use this skill to design robust type-safe APIs and components.

Quick Start

Start by exploring the TypeScript basics: read the "Type System Fundamentals" section, then skim the "Advanced Types" references and try the included code examples in the README and examples folder.

Frequently Asked Questions about typescript

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I migrate a JavaScript project to TypeScript safely?

To design type-safe APIs in TypeScript, master generics, conditional types, and mapped types to enforce design-time correctness, applying utility types alongside libraries like Zod and TanStack for robust end-to-end type safety.

Can I use TypeScript with React and Zod for end-to-end type safety?

Yes, TypeScript integrates with React, TanStack, and Zod to build robust components and achieve end-to-end type safety, leveraging the type system for safer APIs and maintainable codebases.

What's the best way to configure tsconfig.json for a large React app?

TypeScript utility types transform existing structures by mapping properties, creating unions, and extracting subsets, enabling you to write reusable, type-safe patterns without duplicating type definitions.

When do I need TypeScript conditional and mapped types?

TypeScript conditional and mapped types are needed when designing type-safe APIs and enforcing design-time correctness, allowing you to dynamically generate object types and handle complex type logic within your codebase.

Does TypeScript type narrowing help prevent runtime errors in APIs?

TypeScript branded types tag primitive values with distinct type identifiers at compile time, preventing accidental assignment of structurally identical values like user IDs and order IDs in your type-safe APIs.