Bhadresh Pithwa’s Post

I created a simple visual guide explaining the Node.js Event Loop. Understanding execution order helps prevent blocking issues and performance bugs. Let me know if you’d like a deeper breakdown 👇 #nodejs #javascript #backend #eventloop #webdevelopment

🤔 Quick JavaScript question  What do you think this logs? console.log(typeof null); console.log(typeof undefined); 👉 Output "object" "undefined" Surprising, right? 😄 🔹 null is meant to represent an intentional absence of value, but due to a legacy JavaScript bug, typeof null returns "object". 🔹 undefined means a variable exists but has not been assigned a value, and typeof undefined correctly reflects that. #JavaScript #WebDevelopment #NodeJS #MERN #LearningInPublic

100 identical requests. 1 expensive DB call! I wrote about request collapsing and how to implement it in NestJS using an interceptor + decorator. https://lnkd.in/dJZK859c #javascript #nestjs #requestsandlimits

Once you understand how Node handles background tasks like DB calls and API requests, backend becomes much easier. Clean async code = reliable backend #NodeJS #BackendDev #JavaScript

💡 𝐑𝐞𝐚𝐜𝐭 𝐇𝐨𝐨𝐤 – 𝐮𝐬𝐞𝐄𝐟𝐟𝐞𝐜𝐭 (API Call + Dependency Array) ❓ How do we fetch data from an API in React 𝘄𝗶𝘁𝗵𝗼𝘂𝘁 𝗶𝗻𝗳𝗶𝗻𝗶𝘁𝗲 𝗿𝗲-𝗿𝗲𝗻𝗱𝗲𝗿𝘀? Today I learned how useEffect is used for 𝗔𝗣𝗜 𝗰𝗮𝗹𝗹𝘀 and how the 𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝘆 𝗮𝗿𝗿𝗮𝘆 controls when the effect runs 🚀 🔹 𝗪𝗵𝘆 𝘂𝘀𝗲𝗘𝗳𝗳𝗲𝗰𝘁 𝗳𝗼𝗿 𝗔𝗣𝗜 𝗰𝗮𝗹𝗹𝘀? 👉 React re-renders components often 👉 API calls should 𝗻𝗼𝘁 𝗿𝘂𝗻 𝗼𝗻 𝗲𝘃𝗲𝗿𝘆 𝗿𝗲𝗻𝗱𝗲𝗿 👉 useEffect helps control this behavior 🔹 𝗞𝗲𝘆 𝗽𝗼𝗶𝗻𝘁𝘀: 🔹 useEffect is used to handle 𝘀𝗶𝗱𝗲 𝗲𝗳𝗳𝗲𝗰𝘁𝘀 🔹 API calls are usually written 𝗶𝗻𝘀𝗶𝗱𝗲 𝘂𝘀𝗲𝗘𝗳𝗳𝗲𝗰𝘁 🔹 The 𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝘆 𝗮𝗿𝗿𝗮𝘆 decides 𝘄𝗵𝗲𝗻 useEffect runs 🔹 𝗪𝗵𝗮𝘁 𝗱𝗼𝗲𝘀 𝘁𝗵𝗲 𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝘆 𝗮𝗿𝗿𝗮𝘆 𝗱𝗼? 👉 [] → runs 𝗼𝗻𝗹𝘆 𝗼𝗻𝗰𝗲 when the component mounts 👉 [id] → runs when 𝗶𝗱 changes 👉 No array → runs on 𝗲𝘃𝗲𝗿𝘆 𝗿𝗲𝗻𝗱𝗲𝗿 ❌ 📌 This is why the dependency array is 𝘃𝗲𝗿𝘆 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁. Next up: 𝘂𝘀𝗲𝗘𝗳𝗳𝗲𝗰𝘁 cleanup function or real-world API handling? 🤔 #ReactJS #JavaScript #useEffect #APICall #ReactHooks #FrontendDevelopment #LearningInPublic

Day 2 of #365daysofcode I read and revised; HTTP and HTTPS ✅ methods, header and headlines, implementation— Request URL, Request Methods,Status codes... Routing ✅ CRUD REST routing. #NodeJs #backenddev #techjourney #Javascript #Serversidedev

🆕 NEW BLOG! 🆕 🅰️ Modern Angular is easier than React. Here’s why. In this in-depth and neutral analysis, Riccardo Degni explores how modern Angular has evolved with Signals, zoneless rendering, and standalone components to deliver a simpler, more predictable developer experience, especially at scale. 👉 Read the full article on our website : https://lnkd.in/dnfRcypm #Angular #JavaScript #FrontendDevelopment #DeveloperExperience #iJSCon #WebDevelopment

🚀 React Revision Series – Day 9 Today I revised the **Form Handling** in React and created well-structured notes along with practical examples. 📘 What’s included: ✅ Clear revision notes (PDF) ✅ Real-world use cases of Form Handling ✅ Beginner-friendly explanations 📄 Notes (PDF) –https://lnkd.in/dRN3Ab-g #ReactJS #FormHandling #ReactRevision #FrontendDevelopment #JavaScript #LearningInPublic

JavaScript: “𝗧𝗿𝘂𝘀𝘁 𝗺𝗲 𝗯𝗿𝗼.” typeof null === "object" [] == false NaN !== NaN None of these throw errors. None of them are getting fixed. It’s not broken. It’s consistent. Consistently confusing. And somehow, we still build everything on top of it. #JavaScript  #WebDevelopment   #DeveloperLife   #TechHumor