Zod Guide – Learn Schema Validation with TypeScript
A complete multi-part guide to mastering Zod – from beginner schemas to real-world validation with Express, React, and TypeScript.
Introduction to Zod and Schema Basics
A beginner-friendly introduction to Zod, schemas, and basic parsing.
Optional Fields, Default Values, and Type Modifiers
Learn how to make fields optional, add defaults, and handle nullable values.
Building Reusable Schemas Across Frontend and Backend
Share and reuse schemas across frontend and backend for consistent validation.
Validating a User Registration Form
Validate complex registration forms with confirm password and business rules.
Validating API Query Parameters
Cleanly validate query parameters in Express using Zod transformations.
Validating Environment Variables with Zod
Enforce environment variable structure and fail fast with dotenv + Zod.
Creating a Reusable Zod Error Parser for Forms
Build a reusable Zod error parser to simplify form handling in React.
Real-World Case Study – Blog Post Editor Validation
Apply Zod in a real-world blog editor form with nested and conditional logic.
Defining API Schemas with Zod and TypeScript
Learn how to use Zod with TypeScript to validate and type-safe your API inputs, bodies, queries, and responses.
Zod + React Hook Form Integration for Full Form Validation
Integrate Zod into React Hook Form for robust, type-safe form validation.
Validating Express Requests with Zod
Validate Express request bodies and params with a clean Zod middleware setup.
Bonus – Custom Zod Error Formatter for Express APIs
Format Zod errors for consistent API responses using a custom Express handler.
Final Thoughts, Best Practices, and Resources
Final best practices, tips, and resources to use Zod effectively in any app.