Junior
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JavaScript
JavaScript
What is the difference between em and rem units?
Short answer: Unit Relative To Example em Parent’s font size 2em = 2 × parent font-size rem Root (<html>) font size 2rem = 2 × root font-size
Example code
html { font-size: 16px; } p { font-size: 2rem; } /* = 32px */ Key Takeaway: Use rem for consistent sizing across the document.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
- Define — one clear sentence (the short answer above).
- Example — relate it to a project like ShopNest or your real work.
- Trade-off — when you would not use it.
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