NestJS Custom Decorators

When to Use This Skill

Use this skill when:

• Extracting specific properties from request objects
• Creating shortcuts for common parameter patterns
• Setting metadata for guards, interceptors, or filters
• Composing multiple decorators into one
• Implementing role-based access control
• Creating domain-specific abstractions
• Reducing boilerplate in controllers
• Building reusable decorator libraries

What are Custom Decorators?

Decorators are TypeScript/ES2016 features that allow you to add metadata and modify classes, methods, or parameters. NestJS extensively uses decorators and provides utilities to create your own.

Types of Custom Decorators