Js Interview

JavaScript Interview Questions: Implementing Polyfills and Common Functions (With Detailed Answers & Code Examples)

by

Polyfills and utility functions are essential for mastering core JavaScript concepts and are frequently asked in technical interviews, especially for senior roles. This blog post offers a comprehensive overview of JavaScript polyfills and implementations of commonly asked utility functions—complete with code examples and detailed interview-style questions and answers. 🔍 What is a Polyfill? A polyfill … Read more

Debouncing vs. Throttling in JavaScript: A Complete Guide with Interview Questions

by
Debouncing vs. Throttling in JavaScript: A Complete Guide with Interview Questions

Performance optimization is crucial in JavaScript applications, especially when handling frequent user interactions like scrolling, resizing, or keypress events. Two powerful techniques used to limit function execution frequency are debouncing and throttling. In this blog, we’ll explain what debouncing and throttling are, provide detailed coding examples, and cover interview questions with answers related to these … Read more

Mastering Promise Polyfills: A Comprehensive Guide to JavaScript Implementation 2024

by
Implementing a Promise Polyfill

Promises have become a crucial part of JavaScript, enabling cleaner asynchronous code and reducing the notorious “callback hell.” Despite their importance, understanding how Promises work under the hood can be challenging. In this blog post, we’ll build a Promise polyfill to gain a deeper understanding of Promises and answer related interview questions that often arise … Read more

Mastering React Server-Side Rendering (SSR): A Deep Dive into SSR, CSR, and SSG

by
Mastering React Server-Side Rendering (SSR): A Deep Dive into SSR, CSR, and SSG

When building modern web applications with React, one of the most important architectural decisions revolves around how to render content. React offers three primary methods of rendering: Server-Side Rendering (SSR), Client-Side Rendering (CSR), and Static Site Generation (SSG). Each method has its advantages and trade-offs, depending on the use case and performance requirements. In this … Read more

Code Splitting and Lazy Loading in React: Boost Performance in Large Applications

by
Code Splitting and Lazy Loading in React

As React applications grow in size and complexity, performance can degrade due to the increased size of the JavaScript bundle loaded by the browser. To address this, React provides efficient techniques like code splitting and lazy loading that help in optimizing the loading process. These tools reduce the initial load time by loading only the … Read more

Higher-Order Components (HOC): Are They Still Relevant in 2024?

by
Higher-Order Components (HOC) in React

In this blog, we will explore Higher-Order Components (HOCs) and how they can be used with modern React functional components. We will also evaluate if HOCs are still a good pattern in today’s React applications. What is a Higher-Order Component (HOC)? A Higher-Order Component (HOC) is a function that takes a component as input and … Read more

Mastering the useReducer Hook in React 2024: The Ultimate Guide for Advanced State Management

by
useReducer hook in react js

The useReducer hook is one of the advanced hooks in React that helps manage complex state logic in function components. It provides an alternative to the useState hook, especially when the state logic involves multiple sub-values or the state depends on previous values. In this blog, we will explore: What is the useReducer Hook in … Read more

How Does React’s Context API Work? When Would You Use It Instead of a State Management Library Like Redux?

by
React's Context API

React is widely known for its component-based architecture and state management. In simple React applications, passing state between components can be easily managed using props. However, as your application grows in complexity, managing state and passing it down through deeply nested components (called prop drilling) becomes cumbersome. To address this, React introduced the Context API, … Read more

Mastering React Hooks: The Ultimate 2024 Guide with Detailed Examples

by
Mastering React Hooks: The Ultimate 2024 Guide with Detailed Examples

React Hooks provide a more elegant way to manage state, handle side effects, and reuse logic in functional components. This guide walks you through all the core hooks in React, with detailed explanations and code examples, making it easy to understand their purpose and usage. What Are React Hooks? React Hooks are functions that let … Read more