Advanced Typing in TypeScript

What if your types could track data transformations at compile time? Learn the advanced TypeScript patterns that make rock-solid, dynamic APIs possible.

#1about 4 minutes

Understanding the core design principles of TypeScript

TypeScript's design is based on core tenets like structural typing, powerful type inference, and support for common JavaScript patterns.

#2about 6 minutes

A practical example of typing the DOM API

The `addEventListener` method is typed using string literal types, the `keyof` operator, and an event map interface to provide type safety for different event types.

#3about 5 minutes

Designing a type-safe data pipeline inspired by Pandas

A type-safe data processing API can be designed to overcome the runtime errors common in libraries like Pandas by tracking the shape of data frames.

#4about 4 minutes

Using generic record types for table columns

The `Table` interface uses a generic type parameter constrained to `Record<string, any>` to represent named columns with specific types.

#5about 7 minutes

Implementing and demonstrating the data pipeline API

A live demo showcases the API's type inference capabilities for selecting, computing, and dropping columns from a table without explicit type annotations.

#6about 3 minutes