The keyof operator in the generics context is as powerful as it is cool. Once you get the hang of it you are going to make some great APIs that are both easy to use and inherently type safe. You are going to fall in love with this Typescript operator. 00:00 Introduction 00:15 Start coding 00:25 Example #1 - Pluck 03:36 Example #2 - Event Map 07:30 Outroduction Code: https://github.com/jherr/no-bs-ts/tree/master/series-1/episode-8 If you liked this video, buy me a coffee! https://www.buymeacoffee.com/bluecollarcoder 👉 What's my theme? Night Wolf [dark blue] 👉 What's that font? MonoLisa 👉 Jack is also on the React Round Up podcast: https://devchat.tv/podcasts/react-round-up/ 👉 Don't forget to subscribe to this channel for more updates: https://bit.ly/2E7drfJ 👉 Discord server signup: https://discord.gg/ddMZFtTDa5 💢 Watch our other videos: 💟 Hacking your Github contribution graph: https://www.youtube.com/watch?v=_ZQSPYDlk3U 💟 More Typescript videos:    • JavaScript to TypeScript: Beginner to...   Thank you for watching this video, click the "SUBSCRIBE" button to stay connected with this channel. #typescript #NoBSTS