Arrays in React

Array Behaviour in React

1. When you create an array of JSX elements using the map function in React, React will automatically loop over the array and render each element as a separate component.

2. This happens because React is a declarative library. When you write JSX code, you're not telling React how to update the DOM directly.

3. Instead, you're describing what the UI should look like at any given time, and React takes care of updating the DOM as needed to match that description.

4. So when you create an array of JSX elements, you're essentially describing a list of components that should be rendered, and React will automatically loop over that array and render each component.

5. It's important to note that React uses a technique called "virtual DOM" to optimize the rendering process.

6. Instead of updating the DOM directly every time a component changes, React first updates a virtual representation of the DOM, and then calculates the minimum set of changes needed to update the real DOM to match the virtual DOM.

7. This helps to reduce the number of DOM updates and improve performance.