Async code can be some of the hardest code to write in Typescript and Javascript, and we write it all the time. So let's build up some patterns for writing async/await code well, doing multiple stacked async calls, testing our async code, using promises for caching, and even supporting old school callbacks. Code: https://github.com/jherr/async-with-ts PokeAPI: https://github.com/PokeAPI/pokeapi#docker-and-compose-- Promise pool: https://www.npmjs.com/package/@supercharge/promise-pool MSDN Promises documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise 00:00 Introduction 00:32 Project setup 02:31 Promises with then 04:55 Error handling with catch 06:30 Promises with async/await 08:55 Error handling with try/catch 12:15 Making your own promises 13:39 Promises as a cache 16:00 Async looping 20:30 Promise.all 22:15 Promise pooling 24:11 Testing async code 28:55 Async in React 33:19 Callbacks and Function Overloading 38:22 Outroduction 38:48 Requisite silliness 👉 What's my theme? Night Wolf [black] 👉 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. #async #await #javacsript #typescript #react