Interfaces & Type Aliases - Concepts
Explore the key concepts of interfaces & type aliases with practical examples and exercises.
45 min•By Priygop Team•Last updated: Feb 2026
Introduction to Interfaces & Type Aliases
In this section, we cover the fundamental aspects of interfaces & type aliases. You'll learn core concepts, see real-world examples, and understand how to apply them in your projects.
Key Concepts
- Understanding the core principles of interfaces & type aliases
- Practical applications and real-world use cases
- Step-by-step implementation guides
- Common patterns and best practices
- Tips for debugging and troubleshooting
- Performance optimization techniques
Interfaces & Type Aliases - Code Example
Example
// interface
interface User {
id: number;
name: string;
email: string;
isActive?: boolean; // Optional
readonly createdAt: Date; // Read-only
}
// Type Alias
type Status = "active" | "inactive" | "banned";
type Point = { x: number; y: number };
// Extending Interfaces
interface Admin extends User {
role: "admin" | "superadmin";
permissions: string[];
}
// Intersection Types
type Employee = User & { department: string; salary: number };Try It Yourself: Interfaces & Type Aliases
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