🟦 TypeScript Interfaces
An interface in TypeScript defines the shape of an object — the properties and their types — without creating actual implementation.
📚 Example Code: Defining & Using an Interface
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💡 Interfaces are purely for type-checking at compile time — they don’t exist in the compiled JavaScript.
🔧 Interface Syntax
- Use
interface to declare a contract for object shapes
- Interfaces can be extended (inherit) from others
- They can be used to type variables, function parameters, or return values
📑 Extending Interfaces
interface Admin extends User {
role: string;
}
const admin1: Admin = {
name: "Jamie",
age: 30,
isActive: true,
role: "Moderator"
};
⚡ Interfaces are perfect for structuring data models and making your TypeScript code safer and scalable.