What is Asynchronous Code?
Async code is a code that does not execute immediately. It executes after some time. Async code is used to perform long-running tasks without blocking the main thread.
Callbacks in Async Code
A callback is a function passed as an argument to another function. This technique allows a function to call another function.
Promises
A promise is an object that represents the result of an asynchronous operation. It is used to handle asynchronous operations in a better way. It is a replacement for callbacks and events.
Async Await
Async Await is a new way to write asynchronous code in JavaScript. It is a syntactic sugar over promises. It makes asynchronous code look like synchronous code.
Timing Events
Schedule code with setTimeout and setInterval — how JavaScript timers work, how to cancel them, and their common gotchas.
Advanced Async Patterns
Master advanced async JavaScript patterns including Promise.all, Promise.race, error handling, concurrent operations, and timing control.
Final Thoughts
A recap of callbacks, promises, and async/await — when to use each and the mistakes to avoid.