Generics: The most intimidating TypeScript feature

Matt Pocock explains how TypeScript generics work, from basic type arguments to constraints, defaults, and type inference.

Generics are a huge reason why TypeScript is SO DARN POWERFUL. Letting you create types from other types, pass types to functions, and even INFER those types without you needing to specify them. They're pretty advanced, though - so if you want to learn more advanced TypeScript, time to strap in. Become a TypeScript Wizard with Matt's TypeScript Course: totaltypescript.com/ Follow Matt on Twitter twitter.com/mattpocockuk 00:00 Intro 00:36 Generics on the type level 01:45 Passing type arguments to functions 03:06 Passing type arguments to Set 04:21 Inferring the types 05:55 Constraints on type arguments 08:19 Constraints in functions 10:07 Sometimes 'as' is fine 11:23 Multiple type arguments 14:05 Defaults in type arguments 15:00 Integrating with third-party libraries 17:26 Outro