State Vs Prop in React [Tabular Difference]

Let's illustrate each point with examples:

1. Ownership:

   • State:

    class Counter extends React.Component {
      constructor(props) {
        super(props);
        this.state = { count: 0 };
      }
      // ...
    }
   

• Props:
  

   // ParentComponent.js
   import ChildComponent from './ChildComponent';
  
   function ParentComponent() {
     return <ChildComponent name="John" />;
   }
  

1. Mutability:

   • State:

    this.setState({ count: this.state.count + 1 });
   

• Props: Props are immutable and cannot be changed within the component.

1. Scope:

   • State: State is local to the component and not accessible outside of it.
   • Props: Props are passed down from parent to child components and can be accessed within the child component.

2. Initialization:

   • State:

    const [count, setCount] = useState(0);
   

• Props:
  

   // ParentComponent.js
   <ChildComponent name="John" />
  

1. Component-Specific:

   • State: Each instance of a component maintains its own state.
   • Props: Props are passed from parent components and can be different for each instance of the child component.

2. Control:

   • State: Controlled and managed by the component itself.
   • Props: Controlled by the parent component, and changes are propagated down to child components.

3. Communication:

   • State: Used for managing component-specific data that can change over time.
   • Props: Used for passing data and behavior from parent to child components.

4. Updates:

   • State: Changes to state trigger re-renders within the component.
   • Props: Changes in props trigger re-renders in the child component.

5. Usage:

   • State: Used for managing internal component state, such as form inputs, toggle states, etc.
   • Props: Used for configuring child components and facilitating communication between them.