Async JavaScript: Callbacks, Promises, and Async/Await

This video explains JavaScript's single-threaded, event-loop-based execution model and why asynchronous programming is essential. You'll start with callbacks and understand callback hell, then see how Promises provide a cleaner model with .then(), .catch(), and .finally(). The video then covers async/await syntax as a readable layer on top of Promises, and concludes with practical patterns for parallel execution using Promise.all and error handling in async functions.