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Callbacks, Promises, Async Await | JavaScript Fetch API Explained

Learn about Callbacks, Promises, and Async Await as the JavaScript Fetch API is explained in this tutorial. You will also learn about thenables and how async / await replaces them in our JS code. The first 30 minutes covers the concepts. The last 30 minutes gives examples of retrieving data from different APIs with Fetch. ▶ This video is part of the JavaScript Tutorials for Beginners Playlist found here:    • Javascript Tutorials for Beginners   Subscribe ➜ https://bit.ly/3nGHmNn ✅ Quick Concepts outline: Fetch API with Async / Await (0:00) Intro (0:29) What is a callback function? (1:15) What is the problem with callbacks? (3:00) JavaScript Promises have 3 states (5:28) A promise may not return a value where you expect it to: You need to wait for a promise to resolve (6:58) Using thenables with a promise (20:15) An easy mistake to make with promises (24:00) Creating an async function (25:00) Applying await inside the function (33:45) Example 1: Retrieving user data (40:00) Example 2: Retrieving dad jokes (47:00) Example 3: Posting data (49:40) Example 4: Retrieving data with URL parameters (54:55) Abstract it all into single responsibility functions 🤖 APIs used in the examples for this tutorial: • https://jsonplaceholder.typicode.com/ • https://icanhazdadjoke.com/ • https://httpbin.org/ • http://www.icndb.com/api/ 📚 Further Reading: MDN Web Docs: Using Fetch: https://developer.mozilla.org/en-US/d... Making asynchronous programming easier with async and await: https://developer.mozilla.org/en-US/d... The Promise Object: https://developer.mozilla.org/en-US/d... Thenables: https://developer.mozilla.org/en-US/d... Eloquent JavaScript, Chapter 11: https://eloquentjavascript.net/11_asy... ✅ Follow Me: Twitter:   / yesdavidgray   LinkedIn:   / davidagray   Hashnode: https://yesdavidgray.hashnode.dev/ Reddit:   / daveoneleven   Was this tutorial about the JavaScript Fetch API, Async/Await, Promises, Thenables, and Callbacks helpful? If so, please share. Let me know your thoughts in the comments. #async #await #fetch