In this lecture, Harkirat explores key aspects of React, starting with React Hooks like useEffect, useMemo, useCallback, and more, providing practical insights into state management and component functionalities. The discussions extend to creating custom hooks for reusable logic. Prop drilling, a common challenge in passing data between components, is addressed, offering effective solutions. The lecture also covers the Context API, a powerful tool for simplified state management across an entire React application.
In the context of React, side effects refer to operations or behaviors that occur outside the scope of the typical component rendering process. These can include data fetching, subscriptions, manual DOM manipulations, and other actions that have an impact beyond rendering the user interface.
Thus, "side effects" are the operations outside the usual rendering process, and "hooks," like useEffect, are mechanisms provided by React to handle these side effects in functional components. The useEffect hook allows you to incorporate side effects into your components in a clean and organized manner.
React Hooks are functions that allow functional components in React to have state and lifecycle features that were previously available only in class components. Hooks were introduced in React 16.8 to enable developers to use state and other React features without writing a class.
Using these hooks, developers can manage state, handle side effects, optimize performance, and create more reusable and readable functional components in React applications. Each hook serves a specific purpose, contributing to a more modular and maintainable codebase.
Some commonly used React Hooks are:
useState is a React Hook that enables functional components to manage state. It returns an array with two elements: the current state value and a function to update that value.