React Props: Passing Props Tutorial

How to Pass Props in React

To pass props, you add attributes to the child component tag in the parent component's JSX.

Inside the child component, props are accessed via the props object or by destructuring.

• Use JSX attributes to pass data: <Child name="John" />
• Access props in child: function Child(props) { return <p>{props.name}</p>; }
• Destructure props for cleaner code: function Child({ name }) { return <p>{name}</p>; }

Best Practices for Passing Props

Following best practices ensures your React components remain maintainable and predictable.

• Keep props immutable; do not modify them inside child components.
• Use descriptive prop names for clarity.
• Validate props with PropTypes or TypeScript for type safety.
• Pass only necessary data to child components to avoid unnecessary re-renders.

Common Mistakes When Passing Props

Avoid these common pitfalls to prevent bugs and unexpected behavior.

• Trying to modify props inside a child component.
• Forgetting to pass required props, leading to undefined values.
• Passing large objects unnecessarily, causing performance issues.
• Not using unique keys when rendering lists with props.