Lifecycle methods in React are special methods built into class components that allow you to run code at specific points in a component’s life. These methods are categorized into different phases of a component’s lifecycle. Mounting Phase Updating Phase Unmounting Phase 1. Mounting Mounting means putting elements into the DOM. React has four built-in methods … Read more
Event handling in React is similar to handling events on DOM elements. However, there are a few key differences and best practices to keep in mind. 1. Event Handling Syntax In React, events are named using camelCase, rather than lowercase. For example: ‘onclick’ becomes ‘onClick’ ‘onchange’ becomes ‘onChange’ 2. Event Handlers Event handlers are passed … Read more
Managing state in React is crucial for creating dynamic and interactive user interfaces. React provides various ways to manage state, including using hooks in functional components and state management in class components. Using ‘ useState ‘ in Functional Components The useState hook is used to add state to functional components. import React, { useState } … Read more
Using props in React allows you to pass data from one component to another, typically from a parent component to a child component. Here’s a step-by-step guide on how to use props in React: Step 1: Define the Parent Component The parent component holds the data that you want to pass to the child component. … Read more
In React, “props” and “state” are essential concepts used for managing data and rendering components dynamically. Props Definition: Short for “properties”, props are read-only attributes used to pass data from a parent component to a child component. Characteristics: Immutable: Once passed, props cannot be changed by the child component. Pure Data: Props are used purely … Read more
Feature Class-Based Components Functional Components State Management State is managed using this.state and this.setState. State is managed using useState hook. Lifecycle Methods Can use lifecycle methods like componentDidMount, componentDidUpdate, componentWillUnmount, etc. Lifecycle methods are managed using useEffect hook. ‘ this ‘ Keyword Requires binding and use of this keyword. No use of ‘this’ keyword. Performance … Read more
Class components in React are the older way of writing components that can have their own state and lifecycle methods. Before the introduction of hooks in functional components, class components were the primary way to handle state and side effects. Basic Class Component import React, { Component } from ‘react’; class Greeting extends Component { … Read more
Functional components in React are a simpler way to write components that only render UI and do not have their own state or lifecycle methods. These components are essentially JavaScript functions that take in props and return React elements. Basic Functional Component import React from ‘react’; function Greeting(props) { return Hello, {props.name}!; } export default … Read more
In React, a component is a self-contained unit of code that encapsulates the structure (HTML), behavior (JavaScript), and styling (CSS) necessary to render a part of the user interface. Components can be thought of as the building blocks of a React application, each responsible for rendering a specific piece of the UI. In ReactJS, we … Read more
Introduction Rendering elements is the foundation of any React application. Elements are the smallest building blocks of React apps, representing what you want to display on the screen. This chapter will cover how to create and render elements, updating rendered elements, and the lifecycle of rendering. 1. Creating an Element In React, elements are immutable … Read more
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