Type Compatibility

TypeScript ใช้ Structural Typing (Duck Typing) ไม่ใช่ Nominal Typing - compatible ตาม structure ไม่ใช่ตามชื่อ

Structural vs Nominal Typing

Feature	Structural (TypeScript)	Nominal (Java/C#)
Compatibility based on	Structure (shape)	Name/declaration
Interface matching	Automatic	Explicit implements
Flexibility	High	Low