Classes & Interfaces

Classes and interfaces work like standard TypeScript with a few differences.

Key differences from TypeScript:

• No instanceof — there are no runtime type tags
• Static dispatch — method calls are resolved at compile time, not dynamically
• Interfaces are data-only — interfaces define fields, not methods. To attach methods to a type, use a class.
• Access modifiers not enforced at runtime — private/protected are parsed but all fields are accessible in the compiled output. Run chad init to get TypeScript type-checking in your editor, which will flag access violations before you compile.

What's Supported

Feature	Status
Properties (typed fields)	Supported
Constructors	Supported
Parameter properties	Supported
Instance methods	Supported
Getters / setters	Supported
extends (single inheritance)	Supported
implements	Supported
Interface inheritance (extends)	Supported
Static methods and fields	Supported
Abstract classes	Not yet supported
Decorators	Not supported

Interface Field Ordering

One ChadScript-specific detail: object literals are automatically reordered to match the interface's declared field order. You can write fields in any order:

interface Person {
  name: string;
  age: number;
  city: string;
}

const p: Person = { age: 30, city: "NYC", name: "Alice" }; // works fine