Async Code in Node.js: Callbacks and Promises

Web Dev Cohort 2026Node.js

Timeline

**Start:**11 Apr 2026, 8:00 pm

**Due:**10 May 2026, 11:59 pm

Description

To publish the article on Hashnode (or a similar platform), cover the following:

Topics to Cover

1. Why async code exists in Node.js

2. Callback-based async execution

3. Problems with nested callbacks

4. Promise-based async handling

5. Benefits of promises

Suggestions

1. Start with file reading example scenario

2. Explain callback flow step-by-step

3. Compare callback vs promise readability

Diagram Ideas

1. Callback execution chain

2. Promise lifecycle flow