Lets talk about

Typescript type system

TypeScript types

• types
• interfaces
• namespaces
• modules
• enums

Types

Object types

Index types

Interface vs type

• Basically the same
• Only difference is how name collisions resolved
• For interfaces - they are merged, for types - error will be raised
• For ES6 every file is a module, so you don't really care

Window and other global objects

• Sometimes you need to declare something on window
• As window is declared as an interface in typescript - you can just extend it

Generics(Template types)

Useful standard generics

Useful standard generics

• Partial<T>
• Record<K, T>
• Pick<T, K>

Advanced types

Lest build an opposite for Pick

Conclusion

Thanks for coming

• Slides
• Medium article (soon)
• Typescript Advanced types