How do you use nth-child() selector?

Short answer: Selects elements based on their order within a parent. Examples: li:nth-child(2) { color: red; } /* 2nd item */ li:nth-child(odd) { background: #eee; } /* odd items */ li:nth-child(3n) { font-weight: bold; } /* every 3rd item */ Key Takeaway: nth-child() gives you precise control over repeating patterns in lists or grids. Advanced

Example code

Selects elements based on their order within a parent. Examples: li:nth-child(2) { color: red; } /* 2nd item */ li:nth-child(odd) { background: #eee; } /* odd items */ li:nth-child(3n) { font-weight: bold; } /* every 3rd item */ Key Takeaway: nth-child() gives you precise control over repeating patterns in lists or grids. Advanced

Real-world example (ShopNest)

ShopNest’s browser cart uses modern JavaScript: fetch APIs with async/await, modules, and clear error handling.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.