# 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