Mastering Async Programming with Promises, Async, and Await in JavaScript

Table of contents

1. Introduction
   - What is Asynchronous Programming?
   - The Need for Async Programming in JavaScript
2. Understanding Callbacks
   - Callback Functions
   - Callback Hell (Callback Pyramid)
3. Promises
   - Introduction to Promises
   - Creating Promises
   - Three stages of Promises
   - Resolving and Rejecting Promises
4. Using async and await
   - Converting Callbacks to Promises
   - async Functions
   - await Keyword
   - Error Handling with try and catch
   - Parallel Execution
5. Promise.all() and Promise.race()
   - Combining Promises with Promise.all()
   - Competing Promises with Promise.race()
6. Common Mistakes to Avoid
7. Conclusion

1. Introduction

In the fast-paced world of web development, ensuring that your applications remain responsive and performant is crucial. Asynchronous programming in JavaScript is the key to achieving this goal. But what exactly is asynchronous programming, and why do we need it? Let’s start by answering these questions.

What is Asynchronous Programming?