How can you pass data from a parent to a child component?

September 26, 2025

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In React, data is passed from a parent component to a child component using props (short for properties). Props are read-only inputs that allow a parent to provide data or configuration to its children.

How to Pass Data from Parent to Child:

Parent Component
- Include the child component in the parent’s JSX.
- Pass data as attributes (props) to the child.

// Parent.js
import Child from './Child';

function Parent() {
  const message = "Hello from Parent!";
  return <Child greeting={message} />;
}

Child Component
- Receive the data via the props object.
- Use it inside the child component.

// Child.js
function Child(props) {
  return <h1>{props.greeting}</h1>;
}

export default Child;

Output:

Hello from Parent!

Key Points:

Props are read-only: The child component cannot modify the props; it can only use them.
Dynamic Data: You can pass variables, strings, numbers, arrays, objects, or even functions as props.
Destructuring for convenience:

function Child({ greeting }) {
  return <h1>{greeting}</h1>;
}

✅ In short: In React, the parent passes data to a child component through props, allowing the child to display or use that data without directly modifying it.

I can also explain how to pass data from child to parent if you want, which is slightly different. Do you want me to cover that?

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