Why React uses className instead of class

Thinking of skipping HTML and CSS to jump straight to React? Don't. I see this mistake constantly. Beginners rush to frameworks before they understand the basics. Then when something breaks — they have no idea why. Start here: ✅ HTML — structure of a webpage ✅ CSS — make it look good and responsive ✅ JavaScript — make it actually work This is not optional. This is the foundation. React, Next.js, all of that comes after. A house built on sand will fall. Build the foundation first 🏗️ #HTML #CSS #JavaScript #WebDev #LearnToCode

🔥 10 JavaScript One-Liners Every Developer Should Know In this guide, we're sharing 10 tricks that you should know to up your JavaScript game. ✅ Swap Two Variables ✅ Check if a Value is an Array ✅ Generate a Random Integer (0 to N) ✅ Flatten a Deeply Nested Array ✅ Remove Duplicates from an Array ✅ Get the Last Element of an Array ✅ Get the Max or Min Value in Array ✅ Check if an Object is Empty ✅ Reverse a String ✅ Short-Circuit Default Values Save & share with your team! --- If you found this guide helpful, follow me, React.js | JavaScript Mastery for more tips, tutorials, and cheat sheets on web development. Let's stay connected! 🚀 #WebDevelopment #CheatSheet #Coding #CSS #Filters #UI #Frontend #JavaScript #ReactJS

💡 #JavaScript Global vs Local Variables (Simple Explanation) If you're learning JavaScript, understanding variable scope is a must 👇 🔹 Global Variables Declared outside any function Accessible from anywhere in your code Can be used across multiple functions Example: var name = "Avi"; function greet() { console.log(name); // Accessible here } 🔹 Local Variables Declared inside a function or block Accessible only within that function/block Helps avoid unwanted changes from outside Example: function greet() { var message = "Hello"; console.log(message); // Works here } console.log(message); // ❌ Error ⚡ Key Difference Global = accessible everywhere Local = accessible only inside its scope 👉 Tip: Prefer #local variables to keep your code clean and avoid bugs. Use #global where multiple parts of your app need the same value. #frontend #js #javascript

❓ If variables are stored before execution… 👉 what happens when JavaScript sees a function? Does it also behave like var? #JavaScript #Frontend #WebDevelopment

Your website might feel slow… and JavaScript could be the reason. Unminified JS files add extra code, delay execution, and block performance. 👉 Clean code = faster website 💬 Comment “js” to get a free tool #WebsiteSpeed #WebPerformance #PageSpeed #JavaScript #FrontendDevelopment #TechnicalSEO #Optimization #WebDevelopment #CoreWebVitals #DigitalGrowth

Just learned about the DOM (Document Object Model) in JavaScript! The DOM is what allows JavaScript to interact with HTML and CSS, making web pages dynamic and interactive. From changing text, styles, images, to handling button clicks — DOM manipulation is the backbone of modern web development. Example: ✔ Updating content instantly ✔ Creating new elements dynamically ✔ Responding to user actions Understanding DOM is a big step toward becoming a better frontend developer. Edure #JavaScript #WebDevelopment #Frontend #DOM #CodingJourney #LearnToCode

What is AstroJS, and why do I love it so much? (Part 3) I believe that AstroJS--and VueJS for that matter--have an incredibly bright future ahead of them. (Which is good news, as I use Astro and Vue in two of my app projects.) In order to understand why, we need to look at Astro and Vue's build tool--Vite. Vite is a modern web development build tool that provides fast, incremental rebuilds and efficient development experiences for your applications. It's a way of building your AstroJS--and VueJS--applications. Now, previously, Vite used JavaScript bundling tools Rollup and ESM-Build. They were slow, and not the most efficient thing in the world, causing build times to be dozens of seconds long in many cases. However, a recent project has now officially turned that on its head. As of March 12, 2026, Vite announced that they had incorporated the new RC version of a new JavaScript build tool--Rolldown, which is a game changer in terms of website load and build times. Rolldown is a significant improvement over the Rollup + ESBuild approach to building an AstroJS or VueJS application. Rolldown is written in Rust--a language that, if you've seen my past posts, is an extremely powerful and performant language for all sorts of different things. This makes Rolldown up to 3000% (or arguably even higher than that!) faster than Rollup. It offers many of the same features as ESBuild, such as Node.js compatible module resolution, CSS bundling, TypeScript / JSX / syntax lowering transforms, etc. The newest version of Vite--Vite 8--swaps out Rollup and ESBuild for Rolldown, providing massive performance gains. AstroJS currently uses Vite 7, but Vite 8 will soon be rolled out to AstroJS versions--it's on the timeline! If you haven't already, I highly recommend trying out an AstroJS + VueJS approach for the frontend of your business web applications. You now have an incredibly powerful frontend at your disposal. Take a look at Rolldown here, and you'll quickly see why it's so powerful: https://rolldown.rs/

🔥 Built a Rotating Border Button in React & CSS! Just created this satisfying animated button effect using only React + CSS — no external library needed. The trick? CSS @property --angle with conic-gradient to animate a rotating glowing border. Click it and the speed kicks up! ⚡ ✅ Pure React & CSS ✅ @property CSS custom property trick ✅ Glow blur effect on hover & click ✅ Reusable component — drop it anywhere Source code on my GitHub 👇 🔗 github.com/developerimamhn If you're a frontend dev, this one's worth bookmarking. #React #CSS #FrontendDevelopment #WebDevelopment #UIDesign #CSSAnimation #ReactJS #JavaScript #WebDesign #FrontendDev #DeveloperImam

🚀 Polyfills in JavaScript Ever faced this? 😵 👉 Code works perfectly in Chrome 👉 But breaks in older browsers Let’s fix that 👇 🧠 What is a Polyfill? 👉 A polyfill is a piece of code that adds support for modern JavaScript features in older browsers ⚡ Why do we need it? 👉 Not all browsers support new features 👉 Polyfills help bridge that gap 💡 Example: 👉 Modern method: Array.prototype.includes() ❌ Not supported in older browsers 🛠️ Solution: 👉 We create our own version (polyfill) 👉 So older browsers can also use it 🔥 Key Understanding: 👉 If a feature doesn’t exist 👉 We write our own implementation ⚡ Where is it used? ✔ Babel ✔ core-js ✔ Legacy browser support 🚨 Important Note: 👉 Polyfills increase bundle size 👉 Use only when needed 💡 One line to remember: 👉 “Polyfill = Backward compatibility for modern JavaScript” 💬 Did you know this before? 📌 Save this for interviews (very important concept) #javascript #webdevelopment #frontend #coding #programming #javascriptdeveloper #learncoding #developers #100DaysOfCode

most developers don't know the difference between null , undefined and "" and it's breaking their React forms silently. - always initialise string state with ' ' not undefined - always initialise array state with [ ] not undefined - always initialise object state with { } not undefined here's why it matters beyond the warning: - undefined means "this was never set" - null means "this was intentionally set to nothing" - ' ' means "this exists but is currently empty" React treats these three things completely differently when rendering. your form works locally because you fill it in immediately. it breaks in production because someone submits without touching a field. initialise your state properly. #reactjs #typescript #webdevelopment #buildinpublic #javascript