Is JavaScript a synchronous or asynchronous language?
JavaScript is primarily a synchronous, single-threaded language, but it also supports asynchronous programming through features like callbacks, promises, and async/await. 1. What Does Synchronous Mean? Synchronous execution means the code…
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How can you delay the dispatch in React?
To delay a dispatch in React, especially when using something like Redux or React state with useReducer, you can use setTimeout. Example 1: Delaying a Redux Dispatch import { useDispatch…
What is middleware, and what is React Thunk?
Middleware in the context of Redux (and other systems, like web servers) refers to a piece of code that sits between the dispatching of an action and the moment it…
What is Redux, and how does it work?
Redux is a state management library for JavaScript applications, often used with libraries like React. It helps you manage the application's state in a predictable way, especially for complex or…
Explain the uesReducer and useContext hooks in React
useReducer and useContext Hooks in React 1. useReducer Hook Purpose: The useReducer hook is an alternative to useState.It is used when state logic is complex, involves multiple sub-values, or when…
Explain the useState and useEffect hooks in React
Hooks are special functions in React that let you use state and other React features in functional components.The two most commonly used hooks are: 1. useState Hook: Purpose: The useState()…
What is state in React, and what are its properties?
State in React is a built-in object that is used to store and manage data that changes over time in a component.When state changes, the component re-renders, and the UI…
What is a Function Component in React?
A Function Component in React is a JavaScript function that returns React elements (JSX) representing the UI. Key Characteristics of Function Components: FeatureDescriptionStateless (Before Hooks)Initially, function components couldn’t hold state,…
What are controlled and uncontrolled components in React?
When working with form inputs in React, you will often hear the terms Controlled Components and Uncontrolled Components. These refer to how the form data is handled. 1. Controlled Components:…
How Does React Work?
React is a JavaScript library used for building user interfaces, particularly for single-page applications (SPAs).It is component-based, meaning the UI is broken down into reusable, independent pieces called components. Key…
What is Virtual DOM in React?
Virtual DOM (VDOM): The Virtual DOM is a lightweight JavaScript object (a virtual representation of the real DOM). How Virtual DOM Works: Why Virtual DOM is Efficient: Example Flow: function…
What is the Event Loop in JavaScript?
The Event Loop in JavaScript is a mechanism that handles the execution of multiple pieces of code asynchronously and ensures that non-blocking operations are executed efficiently. It is a key…
What is the difference between “HTML” and “HTML5”?
Difference Between HTML and HTML5 HTML (HyperText Markup Language) is the standard language used to create and structure web pages.HTML5 is the latest version of HTML, introducing new features and…
What is Doctype HTML in HTML?
The <!DOCTYPE html> declaration is used to define the document type and version of HTML being used.It tells the **browser to render the webpage in **standards mode (modern rendering) rather…
What is a Meta Tag in HTML?
A meta tag in HTML is an element that provides metadata (information) about a web page.Meta tags do not display content on the page; instead, they provide information to browsers,…
Difference between HTML Tag and HTML Element in HTML?
In HTML, the terms HTML tag and HTML element are often used interchangeably, but they actually refer to slightly different concepts. Here's the distinction between the two: 1. HTML Tag…
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