Typescript Stephen Grider -

But he doesn't stop at explanation. He builds an entire generic Eventing system for a backend model. You write addEventListener<T>(eventName: T, callback: (data: T) => void) . By the time you finish debugging why your 'user-update' event expects a User object, generics are no longer magic—they are a tool. The centerpiece of Grider's TypeScript course is not a to-do app. It is a type-safe state management library from scratch.

Stephen Grider does not promise you will become a TypeScript contributor to the compiler. He promises you will never again push a bug where undefined is not a function at 2 AM. typescript stephen grider

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He draws a "pie". The generic is the slice of pie you pass in. But he doesn't stop at explanation