#React

Create a dark/light mode toggle using React's Context API, ensuring that the UI is fully functional and responsive.

Build a 3x3 grid where clicking on a box turns it green. When all boxes have turned green, they should revert to their original color in reverse order.

Create a custom React hook that returns an object containing 'value', 'resetValue', 'stop', and 'resume' functions for managing a value that increments every second. Ensure to manage the state and side-effects correctly.

Discuss the concepts of closures in JavaScript, React hooks, and how React lifecycle methods work. Provide examples to illustrate your points.

How do hooks simplify React applications? Explain useState, useEffect, useContext, useReducer, and useRef hooks.