Control flow with Nodejs

The Nested Callback Problem ("Callback Hell")

Here's a typical example of "callback hell," where multiple asynchronous operations are nested:

This structure quickly becomes hard to read and maintain as the complexity of the application grows.

Using Promises to Improve Control Flow

Promises help flatten the nested structure, making the code easier to read:

Using async/await with Promises allows you to write asynchronous code that looks more like synchronous code, improving readability and maintainability.

Why Does This Matter?

Control flow management is fundamental when building Node.js applications, especially for tasks like:

• Reading and writing files.
• Querying databases.
• Handling HTTP requests and responses.

By understanding the options available for managing asynchronous operations, developers can write code that is not only functional but also clean and maintainable.