jQuery is a fast, small, and feature-rich JavaScript library.

• jQuery simplifies HTML document traversing, event handling, and animating.

• It provides a set of methods for AJAX interactions and DOM manipulation.

• jQuery is cross-platform and supports a wide range of browsers.

• It has a large community and a vast number of plugins available.

• Project architecture depends on the specific project and its requirements.

Controlled components are React components whose value is controlled by React, while uncontrolled components are not.

• Controlled components are typically used for forms and inputs

• Uncontrolled components are typically used for simple inputs like text fields

• Controlled components use the 'value' prop to set the value of the component

• Uncontrolled components use the 'defaultValue' prop to set the initial value of the component

• Controlled components allow for more control and validat...read more

A computer is an electronic device that can perform various tasks by executing instructions given to it.

• A computer is made up of hardware components such as CPU, memory, and storage devices.

• It runs on an operating system and software applications.

• Computers can be used for various purposes such as communication, entertainment, and work.

• Examples of computers include desktops, laptops, tablets, and smartphones.

HTML is the standard markup language for creating web pages and applications.

• HTML stands for HyperText Markup Language

• It is used to structure content on the web

• HTML elements are used to define the different parts of a webpage

• Examples include

  for headings,

  for paragraphs, and for images

Semantic HTML focuses on the meaning and structure of content, while display properties in CSS control how elements are visually displayed on a webpage.

• Semantic HTML uses tags that convey the meaning of the content, such as

  ,

• Display properties in CSS include properties like display: block, display: inline, display: inline-block, display: flex, display: grid.

• Using semantic HTML helps improve accessibility, SEO, and overall code ma...read more

Redux is a predictable state container for JavaScript apps.

• Redux is a library for managing application state

• It provides a centralized store for all the state of an application

• It uses a single source of truth principle

• It allows for predictable state changes through actions and reducers

• It is commonly used with React for building complex UIs

Hoisting is a mechanism in JS where variables and functions are moved to the top of their scope. Array methods are built-in functions to manipulate arrays.

• Hoisting applies to variable and function declarations

• Variables declared with let and const are not hoisted

• Array methods include push(), pop(), shift(), unshift(), splice(), slice(), forEach(), map(), filter(), reduce()

• push() adds an element to the end of an array

• pop() removes the last element of an array

• shift() removes the...read more

Promise is an object representing the eventual completion or failure of an asynchronous operation.

• Promises are used to handle asynchronous operations in JavaScript

• They are a cleaner alternative to callbacks

• Promises have three states: pending, fulfilled, or rejected

• They can be chained together using .then() and .catch() methods

• Example: new Promise((resolve, reject) => {...})

HTML main features include structure, content, and semantics. Semantics refers to the meaning and purpose of the content.

• HTML provides structure to web pages through elements like

  ,

• Content is added to HTML pages using tags like

  , ,

  , etc.

  • Semantics in HTML refers to using elements that convey meaning, such as

    ,

    ,

  • Semantic HTML helps improve accessibility, SEO, and overall understanding of the content.

Form validation in React ensures user input is correct before submission.

• Use controlled components to manage form state

• Create validation functions to check input

• Display error messages for invalid input

• Disable submit button until form is valid

• Consider using a library like Formik or Yup for easier validation

React hooks are functions that allow functional components to use state and lifecycle methods.

• Hooks were introduced in React 16.8

• useState() is a hook that allows state to be used in functional components

• useEffect() is a hook that allows lifecycle methods to be used in functional components

• Custom hooks can be created to reuse stateful logic across components