Namespaces (Legacy & When to Use)

Namespaces were TypeScript's internal module system prior to standard ES module standardization.

1. Introduction & Architecture

2. Deep Dive & Core Concepts

In modern codebases, preferred design favours ES modules over namespaces. Namespaces are primarily used for declaring complex .d.ts structures.

3. Basic Code Example

4. Advanced Production Patterns

5. Interactive Code Playground

namespace Utility { export const version = "1.0"; }
console.log(Utility.version);

6. Common Pitfalls & Edge Cases

7. Interview Q&A & Quizzes

Q: Are Namespaces obsolete in TypeScript?

A: For application logic, yes—ES modules are standard. Namespaces are still used internally in ambient .d.ts files.

8. Summary Comparison Table