React Native Component Lifecycle

What are the different phases of React Native component lifecycle?

• rendering

• deleting

• initialization, mounting, updating, unmounting

• creation

Explain the purpose of the 'componentDidMount' method in React Native component lifecycle.

• The 'componentDidMount' method is used to define the component's initial state.

• The 'componentDidMount' method is used to update the component state before mounting to the DOM.

• The 'componentDidMount' method is used to perform actions after the component has been mounted to the DOM.

• The 'componentDidMount' method is used to handle user input events.

How can you force a React Native component to re-render?

• setState method or passing new props

• Calling a private method

• Changing the component's class name

• Manually updating the DOM

What is the significance of the 'componentWillUnmount' method in React Native component lifecycle?

• The componentWillUnmount method is used to handle user input

• The componentWillUnmount method is used to initialize a component

• The componentWillUnmount method is used for cleanup operations before a component is unmounted.

• The componentWillUnmount method is used to fetch data from an API

Differentiate between 'componentWillReceiveProps' and 'componentDidUpdate' methods in React Native component lifecycle.

• componentWillReceiveProps is invoked after the component updates with new props or state

• componentWillUpdate is invoked before new props are received

• componentDidUpdate is invoked before the component updates with new props or state

• componentWillReceiveProps is invoked before new props are received, and componentDidUpdate is invoked after the component updates with new props or state.

What is the role of 'shouldComponentUpdate' method in React Native component lifecycle?

• Handles user input events

• Determines if the component should re-render or not based on certain conditions.

• Controls the styling of the component

• Determines the initial state of the component

Explain the use of 'getDerivedStateFromProps' method in React Native component lifecycle.

• The 'getDerivedStateFromProps' method is used to handle user input in React Native components.

• The 'getDerivedStateFromProps' method is used to fetch data from an API in React Native components.

• The 'getDerivedStateFromProps' method is used to style components based on user interactions in React Native.

• The 'getDerivedStateFromProps' method is used to update the component's state based on changes in props before rendering.

How can you handle errors in React Native component lifecycle?

• Use error boundaries like componentDidCatch() in class components or static getDerivedStateFromError() in functional components.

• Use try-catch blocks in the render method

• Manually log errors to the console without handling them

• Ignore errors and hope they resolve themselves

Discuss the importance of 'componentDidCatch' method in React Native component lifecycle.

• The 'componentDidCatch' method is used for styling components in React Native

• The 'componentDidCatch' method is responsible for fetching data from APIs in React Native

• The 'componentDidCatch' method is used for navigation between screens in React Native

• The 'componentDidCatch' method is important in React Native component lifecycle as it helps in error handling and prevents the entire application from crashing due to uncaught errors.

What are the common pitfalls to avoid when working with React Native component lifecycle?

• Handle asynchronous operations in componentDidMount, clean up resources in componentWillUnmount, and use shouldComponentUpdate for performance optimization.

• Clean up resources in componentDidMount

• Avoid using shouldComponentUpdate for performance optimization

• Always use componentWillUpdate for asynchronous operations