Web Coding With Ankur

🔍 What is indexOf() in JavaScript? The indexOf() method in JavaScript is used to find the position (index) of a specific element within a string or array . If the item is not found, it returns -1 . 🧪 Syntax For Strings: string.indexOf(searchValue, startIndex) For Arrays: array.indexOf(searchElement, fromIndex) 📘 How indexOf() Works in Strings const text = "JavaScript is amazing"; console.log(text.indexOf("Script")); // Output: 4 ✅ Case Sensitivity: console.log(text.indexOf("script")); // Output: -1 Note: indexOf() is case-sensitive. 🔁 Finding the First Occurrence const sentence = "I love JavaScript because JavaScript is fun!"; console.log(sentence.indexOf("JavaScript")); // Output: 7 🕵️‍♂️ Find All Occurrences in a String const str = "JS is cool. JS is powerful. JS is everywhere!"; let index = str.indexOf("JS"); while (index !== -1) { console.log("Found at:", index); ...

🚀 Build blazing-fast modern UIs with React, Tailwind CSS, and Vite in 2025. 🔍 Why Use React + Tailwind + Vite in 2025? Q: What’s so special about this stack? Vite : Super fast dev server, instant HMR (Hot Module Reloading), optimized builds. React : Component-based architecture, JSX syntax, robust ecosystem. Tailwind CSS : Utility-first CSS framework for building UIs with speed and precision. 💡 Real-world analogy: Think of Vite as a high-speed kitchen, React as your recipe book, and Tailwind as a set of prepared ingredients ready to mix and match. ⚙️ Step-by-Step Setup for Tailwind + React + Vite ✅ 1. Create the Vite + React Project npm create vite@latest my-app -- --template react cd my-app npm install ✅ 2. Install Tailwind CSS npm install -D tailwindcss postcss autoprefixer npx tailwindcss init -p This creates two files: tailwind.config.js postcss.config.js ✅ 3. Configure Tailwind in tailwind.config.js export default { content: [ ...

React Router 7 is finally here — and it’s packed with smart features to simplify routing in modern React apps. If you’ve worked with react-router-dom before, version 7 takes things further with enhanced routing, smarter layouts, better route-based code splitting, and full support for Suspense. This guide walks you through: 🆕 What’s new in React Router 7 ⚙️ How to install and set it up 💡 Real-world examples with code ❓ Common Q&A for developers upgrading from v6 ✨ Why React Router 7 Matters in 2025 React Router has always been the go-to solution for client-side routing in React apps. But React Router 7 is more than just an update — it's optimized for modern React features like Suspense , lazy loading , and concurrent rendering . 🔍 Core Updates in React Router 7 Built-in Suspense support for route-level code-splitting Data routers extended with better loader and action patterns Improved nested routing with layou...

Creating modern, fast-loading, and highly customizable web apps has never been easier with React , Vite , and Tailwind CSS . If you're a beginner , this guide will walk you through every step to set up a new project from scratch in 2025 using these cutting-edge technologies. 🚀 Why Use Vite + React + Tailwind? ⚡ Vite : A modern, ultra-fast build tool and development server for React. ⚛ React : A powerful library for building user interfaces. 💨 Tailwind CSS : A utility-first CSS framework for fast and responsive UI development. 🧰 Prerequisites Before we begin, make sure you have: Node.js installed (v18 or higher recommended) npm or yarn A code editor like VS Code Basic understanding of JavaScript and React 📦 Step 1: Create a React App Using Vite Run the following in your terminal: npm create vite@latest my-react-app --template react Or with yarn: yarn create vite my-react-app --template react Then in...

How to Fix npx tailwindcss init Error: “Could Not Determine Executable to Run” Are you getting this error while trying to initialize Tailwind CSS? npx tailwindcss init npm ERR! could not determine executable to run Don’t worry — this is a common issue that’s easy to fix if you understand what’s causing it. This post will guide you step-by-step on how to resolve it. 🔍 Why This Error Happens You haven’t installed the tailwindcss package. You don’t have a package.json file in your project. npx doesn’t know what to run because the executable is missing. ✅ Fix 1: Install Tailwind CSS Before Running the Command First, install Tailwind CLI in your project: npm install -D tailwindcss Now run the init command: npx tailwindcss init ✅ Fix 2: Make Sure You Have package.json If your project is missing package.json , run: npm init -y npm install -D tailwindcss npx tailwindcss init ✅ Fix 3: Clear NPX Cache Sometimes cle...

📌 Introduction JavaScript is a language designed to treat functions as first-class citizens. This means you can pass functions as arguments, return them from other functions, and assign them to variables — opening the door to higher-order functions . One of the most widely used higher-order functions is filter() . In this blog, we'll take a deep dive into: What is a higher-order function in JavaScript? What is filter() and why it's considered a higher-order function? Real-world examples of using filter() Code snippets to boost your learning Q&A to answer common developer queries 🔍 What is a Higher-Order Function in JavaScript? A higher-order function is any function that does at least one of the following: Takes another function as an argument (callback function) Returns a function as its result function greetUser(greetingFn) { greetingFn(); } function sayHello() { console.log...