Darshan Vasani

🚀 React Interview Question Series: Day 5 🚀 👨‍💻 Question: What are React Keys and why are they important? 💡 Answer: In React, keys are special attributes you add to elements when rendering lists. They help React identify which items have changed, are added, or are removed, allowing for efficient updates to the user interface. 1️⃣ What is a Key? A key is a unique identifier assigned to elements within a list. Commonly, you’ll use an item’s ID or unique property as its key. Example: const items = ["A...

🚀 React Interview Question Series: Day 3 🚀 👨‍💻 Question: What’s the difference between JSX and JS in React? 💡 Answer: 1️⃣ JSX (JavaScript XML): JSX is a syntax extension for JavaScript that looks like HTML. It allows you to write UI components in a way that is familiar and expressive, making your code more readable. JSX is not valid JavaScript, so it needs to be compiled (using Babel) into regular JavaScript before it can be understood by browsers. Example: const element = <h1>Hello, World!</h1>; Th...

🚀 React Interview Question Series: Day 2 🚀 👨‍💻 Question: How can you use the useState hook to update the state in two ways? 💡 Answer: React’s useState hook allows us to update the state in multiple ways. Here are two common approaches: 1️⃣ Direct Update (Non-functional update): const [counter, setCounter] = useState(0); setCounter(counter + 1); setCounter(counter + 1); setCounter(counter + 1); 💡 Result: The counter value only increments by 1, not by 3. Why? React batches state updates when they don...