Microsoft Teams heavily uses TypeScript with React, which has helped their developers write better code and increase overall code efficiency. I am an engineer on Teams, and have had hands-on experience using React with and without TypeScript. This talk aims to provide developers with a better understanding of TypeScript, how it helps writing React code, its overall benefits, as well as decisions to use it in your codebase.

This talk will focus on the following topics:
- Introduction to TypeScript and how it is different to JavaScript (explaining type system, differences between JavaScript and TypeScript with examples)
- Using TypeScript with React (benefits, how it differs from React with vanilla JavaScript with examples)
- How TypeScript helps Microsoft Teams scale and ship faster
- Decisions to Use TypeScript in a codebase (pros and cons)