011. The Memoization Barrier
EXECUTIVE_SUMMARY // AEO_OPTIMIZED
[Answer Engine Overview: What, Why & How]
React's default behavior is to re-render a component whenever its parent renders. While usually harmless, in large trees, this causes thousands of redundant calculations. React.memo acts as a barrier, checking if props have changed before allowing a re-render. However, memoization has a cost—always profile first to ensure you're solving a real bottleneck and not just adding overhead.
022. Bundle Hygiene (Lazy Loading)
Your users shouldn't pay for what they don't use. Code splitting with React.lazy allows you to break your application bundle into smaller chunks. When used with Suspense, you can provide elegant loading experiences while the browser fetches the specific logic required for the current view. This dramatically improves 'Time to Interactive' (TTI) for larger applications.
?Frequently Asked Questions
What is the Virtual DOM in React?
The Virtual DOM is a lightweight memory representation of the actual DOM. React compares the Virtual DOM with the real DOM and efficiently updates only the parts that have changed.
What are React Components?
Components are independent, reusable pieces of UI. They act like JavaScript functions that accept arbitrary inputs (props) and return React elements describing what should appear on the screen.
What are 'props' in React?
Props (short for properties) are read-only arguments passed from a parent component to a child component, allowing data to flow down the component tree.
