Object Shapes

👨‍💼 Let's create interfaces for our domain objects. Interfaces are the standard way to define object shapes in TypeScript.

🐨 Open

index.ts

and:

Create a Product interface with:
- id: string, name: string, price: number
- status: 'active' | 'inactive' | 'discontinued'
- optional description?: string
Implement getProductSummary(product: Product): string that includes the name, price, and either the description or a clear no-description fallback (intended shape: name, price, then description text)
Create product (no description) and productWithDesc (with description: 'Has description') sample values
Export getProductSummary, product, and productWithDesc by name

Completion criteria

Named exports: getProductSummary, product, productWithDesc
Both samples use a valid status union member
product.description is undefined; productWithDesc.description is 'Has description'
Summary includes name and price, and uses the description when present (otherwise a no-description fallback) so the two samples produce different strings