# Adding Models

With TypeScript we can also write classes for the data our app works with.

![Cheat sheet: Adding Models](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/43555006fcd0470788745fd21c42a308.webp)

- Category: TypeScript
- Level: Apprentice
- Tags: Class in TypeScript, Definite Assignment Assertion, Optional Property, typescript
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/working-with-typescript-adding-models-cheat-sheet