This taught me so much about advanced TypeScript
My Angular course:
It feels like there are two different worlds of TypeScript, and more advanced TypeScript can look completely incomprehensible - even if you’ve been using TypeScript for a long time. This video walks through typing a simple utility from an Angular library, and highlights some advanced TypeScript concepts that might not be as scary as they first seem.
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0:00 Introduction
0:36 The Initial API
1:49 The Untyped API
2:06 Generic for initialState
2:55 Typing reducers
4:57 Typing selectors
5:16 The return type
7:55 Conclusion
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