Understanding State and Props in React Native Functional Components

Understanding State and Props in React Native Functional Components

React Native, the popular framework for building mobile applications, allows developers to build both functional and class-based components. In this blog, we will be discussing the concepts of state and props in functional components.

States in React Native refers to the data or variables that determine a component's behavior and render dynamic content. It is an object that holds the current values of a component and can be updated by the component itself. The state is managed by the component and can be accessed and updated using the useState hook.

const [name, setName] = useState("test user")

In the example above, we are using the useState hook to create a state variable called name with an initial value of "test user". The hook returns an array with two elements - the current state value and a function to update the state value. In this case, we are destructuring the array to two variables name and setName.

However, props are used to transfer data between parent and child components. The child component is unable to update them because they are read-only. Using the props object, props can be accessed and passed to a component.

function ChildComponent(props) { 
  return <Text>Hello {props.name}</Text> 
}

In the example above, we are creating a functional component called ChildComponent that takes in an object called props. We are then using the props object to access the name property and displaying it on the screen.

<ChildComponent name="test user" />

In this example, we are passing a prop called name with the value of "test user" to the ChildComponent. The component will then display "Hello test user" on the screen.

In React Native, state and props are distinct concepts that should not be confused with one another. Props are used to transfer data from a parent component to a child component, whereas state is used to manage and update data within a component. You can make your React Native applications' code more dynamic and reusable if you know how to use state and props in functional components.

In conclusion, you can manage and pass data between components in a way that is functional with the help of powerful React Native features like State and Props. You can make more dynamic and reusable code in your React Native applications if you know how to use them well.