Passing State as Props
In React, state can be passed between components using props. This allows a child component to access and use the state values of its parent component.
To pass state as props, follow these steps:
- Define the state in the parent component
- Render the child component and pass the state value as a prop
- Access the state value in the child component using props
Here's an example:
SNIPPET
1// Let's create a parent component that has a state value
2import React, { useState } from 'react';
3
4const ParentComponent = () => {
5 const [count, setCount] = useState(0);
6
7 return (
8 <div>
9 <h1>Parent Component</h1>
10 <p>Count: {count}</p>
11 <ChildComponent count={count} />
12 </div>
13 );
14};
15
16// Now, let's create a child component that receives the state value as a prop
17const ChildComponent = ({ count }) => {
18 return (
19 <div>
20 <h2>Child Component</h2>
21 <p>Received Count: {count}</p>
22 </div>
23 );
24};
25
26const App = () => {
27 return (
28 <div>
29 <ParentComponent />
30 </div>
31 );
32};
33
34ReactDOM.render(<App />, document.getElementById('root'));In this example, the ParentComponent has a state value count initialized to 0. The count value is passed as a prop to the ChildComponent using the count={count} syntax. The ChildComponent receives the prop value and displays it in the UI.
You can try running this code and see how the state value is passed as a prop and displayed in the child component.
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ReactDOM.render(<App />, document.getElementById('root'));// Let's create a parent component that has a state valueimport React, { useState } from 'react';const ParentComponent = () => { const [count, setCount] = useState(0); return ( <div> <h1>Parent Component</h1> <p>Count: {count}</p> <ChildComponent count={count} /> </div> );};// Now, let's create a child component that receives the state value as a propconst ChildComponent = ({ count }) => { return ( <div> <h2>Child Component</h2> <p>Received Count: {count}</p> </div> );};const App = () => { return ( <div> <ParentComponent />OUTPUT
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