JavaScript Performance Tip: requestIdleCallback

Built my Weather App using HTML, CSS & JavaScript! 🌦️ I wanted to practice APIs and async JavaScript, so I made a Weather App that works with live data using the OpenWeather API. ***What this app does:*** 🌍 Search weather of any city 🌡️ Shows temperature + feels like 💧 Humidity + visibility 🌇 Sunrise & sunset time 🖼️ Weather icon based on live data 🗺️ Displays the city location using Google Maps iframe ⏳ Added a proper loader while data is fetching (better user experience) 📌 Note: The 7-day forecast section is currently dummy, because OpenWeather’s full forecast (One Call API) requires billing/paid plan. I’ll improve this soon using another approach. 🔧 What I learned from this project: • Calling APIs using fetch() • async/await + try/catch error handling • DOM manipulation for dynamic UI updates • Debugging real issues (best learning ) 💬 Suggestions are welcome in the comments, I’d love to improve it! #JavaScript #OpenWeatherAPI #GoogleMaps #WebDevelopment #HTML #CSS #Projects #APIs #LearningByBuilding #FirstYear #VedamSchoolOfTechnology

✨ 𝗗𝗮𝘆 𝟯𝟳 – #𝟭𝟬𝟭𝗗𝗮𝘆𝘀𝗢𝗳𝗖𝗼𝗱𝗶𝗻𝗴 ✨ On Day 37, I built an Image Search App using HTML, CSS, and JavaScript 🔍🖼️ This project helped me understand how search-based applications work and how JavaScript interacts with APIs and dynamic data to update the UI in real time. 🔧 What I worked on today: 👉 Built an Image Search interface 👉 Fetched images dynamically based on user input 👉 Displayed results in a clean grid layout 👉 Improved understanding of API handling and DOM updates 👉 Styled the app with simple and responsive CSS 💡 Learning of the Day: Search-based projects strengthen API handling, async JavaScript, and dynamic UI rendering — all essential skills for real-world frontend applications. 🔗 GitHub Repo: https://lnkd.in/g9bkCB9e Let’s keep learning and building 🚀💙 #javascript #imagesearch #api #webdevelopment #frontend #chaiaurcode #codingjourney #learninginpublic #101DaysOfCoding #growthmindset #developerlife #projects

🚀 𝐋𝐞𝐚𝐫𝐧𝐢𝐧𝐠: 𝐇𝐨𝐰 𝐭𝐨 𝐝𝐞𝐭𝐞𝐜𝐭 𝐔𝐈 𝐜𝐡𝐚𝐧𝐠𝐞𝐬 𝐢𝐧 𝐒𝐢𝐧𝐠𝐥𝐞 𝐏𝐚𝐠𝐞 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 (𝐒𝐏𝐀) 𝐮𝐬𝐢𝐧𝐠 𝐌𝐮𝐭𝐚𝐭𝐢𝐨𝐧𝐎𝐛𝐬𝐞𝐫𝐯𝐞𝐫 Sometimes in web apps, switching tabs or sections doesn’t trigger browser events like window.focus or visibilitychange. This is common in 𝐒𝐢𝐧𝐠𝐥𝐞 𝐏𝐚𝐠𝐞 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 (𝐒𝐏𝐀) where the page doesn’t reload and components stay in the DOM. So, how do we know when a tab becomes visible? That’s where 𝐌𝐮𝐭𝐚𝐭𝐢𝐨𝐧𝐎𝐛𝐬𝐞𝐫𝐯𝐞𝐫 comes in. 🔍 What is MutationObserver? MutationObserver is a 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝘁𝗼𝗼𝗹 that watches for changes in the page’s HTML (DOM). It can detect things like: Class changes Style updates Elements being shown or hidden This is perfect for SPAs because the UI updates without page reloads. 🧩 𝗕𝗲𝗴𝗶𝗻𝗻𝗲𝗿-𝗙𝗿𝗶𝗲𝗻𝗱𝗹𝘆 𝗘𝘅𝗮𝗺𝗽𝗹𝗲 ```js const tabElement = document.querySelector('.tab-container'); // Create an observer const observer = new MutationObserver(() => {  const isVisible = tabElement.offsetWidth > 0;  if (isVisible) {   console.log("Tab is visible → refresh data");  } }); // Start observing style or class changes observer.observe(tabElement, {  attributes: true,  attributeFilter: ['style', 'class'] }); ``` 🔹 How it works (plain English) 𝐏𝐢𝐜𝐤 𝐭𝐡𝐞 𝐞𝐥𝐞𝐦𝐞𝐧𝐭 you want to watch (tabElement). 𝐂𝐫𝐞𝐚𝐭𝐞 𝐚 𝐌𝐮𝐭𝐚𝐭𝐢𝐨𝐧𝐎𝐛𝐬𝐞𝐫𝐯𝐞𝐫 — this is like saying “Hey browser, tell me if this element changes”. 𝐒𝐭𝐚𝐫𝐭 𝐨𝐛𝐬𝐞𝐫𝐯𝐢𝐧𝐠 with .observe() and tell it what to watch (style or class). 𝗧𝗵𝗲 𝗰𝗮𝗹𝗹𝗯𝗮𝗰𝗸 𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻 𝗿𝘂𝗻𝘀 whenever the element changes or becomes visible — for example, you can refresh your data or trigger any action in your React app. 💡 𝗪𝗵𝘆 𝘁𝗵𝗶𝘀 𝗶𝘀 𝘂𝘀𝗲𝗳𝘂𝗹 • Works in SPAs where the page doesn’t reload • Detects when a tab or component becomes visible • Simple and lightweight • No need for complex event listeners #JavaScript #WebDevelopment #Frontend #MutationObserver #SPA #BeginnerFriendly #Learning

✨ Day 8 of #30Days30Projects Project: Motivational Quotes App   A responsive web application that fetches and displays motivational quotes in real time using a public API. ✨ Key Features: Clean, responsive UI with soft LightSalmon background and rounded card design (HTML + CSS). Real‑time quote fetching powered by JavaScript Fetch API. User‑friendly interaction with a simple “Show Message” button. Error handling with clear alerts for smooth user experience. Deployed easily on GitHub Pages for instant access. 💻 Tech Stack:   Frontend: HTML, CSS, JavaScript API: Quotes API (fetches motivational quotes dynamically) Deployment: GitHub Pages 🔗 Live Demo: https://lnkd.in/dPrJqiPt 🙏 A big thank you to Kamal shah sir for guidance, mentorship, and continuous support throughout this project. #30Days30Projects #CodingChallenge #DailyProjects #BuildInPublic #WebDevelopment #Frontend #JavaScript #HTML #CSS #GitHubPages #APIs

Day 27 of 100 | JavaScript Practice 🚀 If you really want to understand JavaScript, stop watching tutorials endlessly and build projects. Here are 10 best JavaScript project ideas that actually improve your logic 👇 1️⃣ To-Do List App → DOM manipulation, events, localStorage 2️⃣ Weather App (API Based) → Fetch API, async/await, error handling 3️⃣ Calculator → Conditions, event listeners, clean logic 4️⃣ Quiz App → Arrays, objects, score logic 5️⃣ Expense Tracker → CRUD operations, data persistence 6️⃣ Digital Clock / Countdown Timer → Date & Time, setInterval 7️⃣ Password Generator → Math.random(), string methods 8️⃣ Notes App → localStorage, UI updates 9️⃣ Form Validation System → Regex, real-world validation logic 🔟 Mini E-commerce Cart → Add/remove items, totals, state handling 💡 Tip: Don’t try to make it perfect. Make it work first, then improve UI. Building projects = confidence + real skills 💻✨ #JavaScript #WebDevelopment #LearningInPublic #100DaysOfCode #FrontendDeveloper #CodingJourney #PracticeProjects

From Console to Chrome: Bringing Logic to Life! 🚀💻 I was recently practicing to master JavaScript fundamentals. What started as a simple script to practice logic building and function structures evolved into something much bigger. Instead of just looking at conversion results in my terminal, I decided to build a full web application to see my code in action! What went into this build: Logic Building: I architected a multi-unit system using if/else statements to handle bi-directional conversions between Miles, KM, and Feet. DOM Manipulation: I bridged the gap between code and user by using document.getElementById and innerText to turn raw data into a dynamic UI. Error Resilience: I implemented isNaN checks to ensure the app handles empty inputs gracefully. Design Thinking: I stepped out of the script and into the browser, using CSS gradients and flexbox to create a modern, user-friendly interface. Tools used: Vanilla JavaScript, HTML5, and CSS3. This project reminded me that programming isn't just about solving problems in the console—it's about creating tools that provide a great user experience. Let me know your thoughts on this, and any suggestion for this webapp. #JavaScript #WebDevelopment #CodingJourney #VanillaJS #FrontEnd #LogicBuilding #LearningToCode

🔹 React Tip Series – Tips #5 useEffect Is NOT for Everything One of the most common React mistakes is overusing useEffect. If your app feels buggy, slow, or “random” — chances are, useEffect is misused. 🔹 Core Rule (Remember This) If something can be derived during render, you DON’T need useEffect. 🔹 Common Wrong Pattern const [fullName, setFullName] = useState(""); useEffect(() => { setFullName(firstName + " " + lastName); }, [firstName, lastName]); ❌ Extra state ❌ Extra render ❌ Unnecessary effect 🔹 Correct Pattern const fullName = firstName + " " + lastName; ✔ No side effects ✔ Cleaner logic ✔ Predictable UI 🔹 When useEffect IS Actually Needed : 1) Use it only for side effects: 2) API calls 3) Subscriptions (sockets, events) 4) Timers 5) DOM interactions 🔹 Most Common useEffect Bug useEffect(() => { fetchData(); }, []); ❌ Missing dependencies ❌ Stale data bugs 🔹 Fix by: useEffect(() => { fetchData(id); }, [id]); 🔹 Pro Tip useEffect is for syncing with the outside world, not for state calculations. 📌 Follow the React Tips Series More practical React tips coming daily 🚀 #ReactJS #useEffect #FrontendTips #ReactHooks #WebDevelopment #LearningInPublic

🗞️ 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁’𝘀 “𝗜𝗻𝘃𝗶𝘀𝗶𝗯𝗹𝗲” 𝗥𝗲𝗳𝗲𝗿𝗲𝗻𝗰𝗲 𝗧𝗵𝗮𝘁 𝗣𝗿𝗲𝘃𝗲𝗻𝘁𝘀 𝗠𝗲𝗺𝗼𝗿𝘆 𝗟𝗲𝗮𝗸𝘀 🚀 𝗘𝘃𝗲𝗿 𝘄𝗼𝗻𝗱𝗲𝗿𝗲𝗱 𝗵𝗼𝘄 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗵𝗮𝗻𝗱𝗹𝗲𝘀 𝗺𝗲𝗺𝗼𝗿𝘆 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗯𝗿𝗲𝗮𝗸𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗮𝗽𝗽? Meet WeakRef — a lesser-known but powerful feature. 👇 ⸻ 🔹 What is WeakRef? WeakRef lets you hold a weak reference to an object — meaning JavaScript can garbage-collect it if nothing else is using it. ⚠️ Unlike normal references, WeakRef does NOT prevent cleanup. ⸻ 🔹 Why does it matter? In large apps: • Caches grow endlessly • Event handlers leak memory • Long-running apps slow down 👉 WeakRef helps avoid these issues by not owning the object. ⸻ 🔹 Simple Example 𝗹𝗲𝘁 𝘂𝘀𝗲𝗿 = { 𝗻𝗮𝗺𝗲: "𝗔𝗹𝗶𝗰𝗲" }; 𝗰𝗼𝗻𝘀𝘁 𝘄𝗲𝗮𝗸𝗨𝘀𝗲𝗿 = 𝗻𝗲𝘄 𝗪𝗲𝗮𝗸𝗥𝗲𝗳(𝘂𝘀𝗲𝗿); 𝘂𝘀𝗲𝗿 = 𝗻𝘂𝗹𝗹; // 𝗼𝗯𝗷𝗲𝗰𝘁 𝗰𝗮𝗻 𝗻𝗼𝘄 𝗯𝗲 𝗴𝗮𝗿𝗯𝗮𝗴𝗲-𝗰𝗼𝗹𝗹𝗲𝗰𝘁𝗲𝗱 𝗟𝗮𝘁𝗲𝗿: 𝘄𝗲𝗮𝗸𝗨𝘀𝗲𝗿.𝗱𝗲𝗿𝗲𝗳(); // 𝗿𝗲𝘁𝘂𝗿𝗻𝘀 𝗼𝗯𝗷𝗲𝗰𝘁 𝗢𝗥 𝘂𝗻𝗱𝗲𝗳𝗶𝗻𝗲𝗱 ⸻ 🔹 Where WeakRef Shines • Caching heavy objects • Tracking DOM elements • Memoization without leaks • Observers & metadata storage ⸻ 🔹 Important Warnings ⚠️ • Never rely on WeakRef for critical logic • Garbage collection timing is unpredictable • Always check for undefined ⸻ 🚀 Final Thought WeakRef isn’t about speed — it’s about control, safety, and smarter memory management. Most devs don’t need it… But when you do — it’s a lifesaver 💡 👇 Have you ever faced a memory leak in JS? Let’s discuss. #JavaScript #WebDevelopment #Frontend #MemoryManagement #JS #SoftwareEngineering

🚀 Excited to share my latest project: GPA Calculator! A dynamic web app built with HTML, CSS, and JavaScript that lets students: o Add unlimited subjects o Select grades and credits o Automatically calculate GPA Check it out on GitHub: https://lnkd.in/gbZw_AQU #webdevelopment #javascript #opensource #students #GPAcalculator #projects