From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Purity props example

Purity props example

From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Purity props example

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In this session, we're going to learn about keeping React components pure by avoiding the alteration of props. This is crucial for building predictable and maintainable React applications. We will do that through by building an example that does not follow the rules, then we will fix it. By the end, you'll understand how to write clean, functional components that don't cause unexpected side effects. Let's introduce a new component called ShoppingList. This component takes an items prop, which is an array of objects. Each object represents an item with an ID and a label. Inside ShoppingList, I use the map method to iterate over the items array and render each item as a list item, li. The key prop is essential for React's efficient rendering. It uniquely identifies each list item. The ShoppingList component is now ready to display a dynamic list of items. Now it is time to add some data. I've added an array called Items to the App component. This array contains three sample shopping…

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