React useRef Trick 😱 Get Previous State Value Like a Pro!

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In this video, we solve a very tricky React JS interview question:
👉 How to get the previous state value in React?
Many developers try using state… but that causes unnecessary re-renders 😬
The correct solution? ✅ useRef + useEffect

In this video, you’ll learn:
✅ How to store previous state in React
✅ Difference between useState and useRef
✅ Why useRef does NOT trigger re-render
✅ Real interview explanation
✅ Practical project use case

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This question is frequently asked in React interviews and is also very useful in real-world applications like form comparisons, undo functionality, and tracking changes.

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