Stop Console Log Madness with VS Code Debug Terminal

Your React component is leaking memory and you have no idea. I just read about this pattern in the docs. I realized I was fighting the React lifecycle for months 😅 The problem? Race conditions from uncleared async requests. When you fetch data on state change: - User changes profile 10 times in 1 minute - 10 API requests fire - Only the LAST response updates state - Previous 9 complete but state is already changed - Memory leak + stale data Most devs skip cleanup. Most tutorials show incomplete examples. Result? Wasted requests, stale data, memory leaks. #React #JavaScript #Performance #WebDevelopment

2 posts ago: a 9,200-line React codebase from 2019. Today: migration done. The numbers: 📊 Codebase - 77 files → 142 focused modules - 0% → 100% TypeScript strict - 11 runtime deps → 3 🛡️ Removed entirely - jQuery - moment.js - axios 0.19 (known CVEs) - Redux + react-redux + redux-thunk - create-react-app 3.4 (abandoned) - Console.log interceptors leaking tokens ⚡ Tooling - HMR: ~8s → <1s (CRA → Vite 8) - react-router v5 → v7 - tsc --strict: 0 errors - ESLint flat config: 0 warnings 🕐 Time - Manual rewrite: weeks, team - My pipeline: days, solo Note: LOC actually *went up* (9.2k → 12.4k). That's what a real migration looks like — types, split files, typed API layer. The win isn't shrinkage. It's 8 dependencies gone, zero CVEs, every file type-checked. Full case study: https://lnkd.in/gsw29EEd --- Here's the thing nobody talks about: Most companies don't rewrite legacy code because it's too expensive and too risky. So they keep patching. Adding duct tape on top of duct tape. Until one day the entire thing breaks and they're stuck. What if the rewrite took days instead of months? What if it cost a fraction of what agencies charge? What if the risk was near zero because the business logic is preserved automatically? That's what I built. If your startup or agency is sitting on a codebase that slows down every sprint — DM me. I'll show you what the modernized version looks like before you commit to anything. --- #react #typescript #vite #javascript #ai #webdevelopment #legacycode #codemodernization #softwaredevelopment

Day 5 — Find Largest Number in an Array (JavaScript) Problem Write a function to find the largest number in an array. Example Input: [3, 7, 2, 9, 5] Output: 9 Approach Loop through the array and keep track of the maximum value. Code function findLargest(arr){ let max = arr[0] for(let i = 1; i < arr.length; i++){ if(arr[i] > max){ max = arr[i] } } return max } console.log(findLargest([3,7,2,9,5])) Alternative Approach function findLargest(arr){ return Math.max(...arr) } What I Learned How to track maximum value while iterating through an array. #javascript #frontenddeveloper #codingpractice #webdevelopment

💡 Lesson Learned Today: While working on implementing search functionality in a React + Redux application, I faced an issue where the search input was updating correctly… but the results were not filtered at all 🤔 After debugging, I discovered an important insight: 👉 Not every “search issue” comes from the frontend. ✔️ The request was being sent correctly ✔️ The search parameter was included in the API call ❌ But the backend endpoint didn’t support filtering with that parameter 🔍 What I learned: Always verify: Is the correct parameter name being sent? Is the backend actually using it? Check the Network tab before assuming the issue 🚀 Sometimes the best debugging skill is knowing where the problem is NOT. #FrontendDevelopment #React #Redux #Debugging #WebDevelopment #LearningJourney

I fixed a like button bug today that looked simple… but wasn’t. Clicks were working… But likes were not updating correctly. The issue? State was not syncing with the backend response. Once I fixed the state update logic, everything worked perfectly. Lesson: • Always sync frontend state with backend data • Don’t rely only on UI changes Small feature. Real learning. What bug did you fix recently? #FullStackDeveloper #WebDevelopment #JavaScript #Debugging #ProblemSolving

How do you parse MDX in Next.js with a 0 KB client bundle? 🤔 After months of development and testing, I’m incredibly proud to announce the public launch of Omni-Core (and its stable release v1.1.0)! 🎉 Historically, MDX rendering in React has always been a trade-off: either you sacrifice build speed, or you bloat the client bundle, which hurts performance. And with the arrival of React Server Components (RSC), getting complex ASTs to coexist with the JS ecosystem (Rehype/Unified) has proven to be a real sanitization headache. With Omni-Core, we tackled the problem at its root: moving everything to a native Rust engine. Here’s what’s under the hood 🛠️: 🦀 Native Rust core (napi-rs): A parser 10 to 50 times faster than in JS, using a zero-copy memory architecture to communicate with V8. ⚛️ 100% Server Components: MDX is parsed on the server and sent to the browser as pure static HTML. No parsing logic is sent to the client. 🛡️ Unified/HAST Bridge: Your favorite Rehype plugins (syntax highlighting, etc.) work natively without destroying your component metadata or LaTeX formulas. 🐍 Web & Desktop Parity: This same Rust engine powers our Python library for native rendering (PyQt5) that is strictly identical to the web version. The project is entirely open-source. If you’re interested in extreme optimization, Next.js, or Rust/V8 interoperability, feel free to check out the repo and the documentation! 👇 🔗 GitHub: https://lnkd.in/eQDiZfut 📖 Documentation: https://omni-core.org/mdx Your feedback or pull requests are welcome! And a little ⭐️ on the repo is always appreciated to support the project. #Nextjs #Rust #ReactJS #OpenSource #WebPerformance #DeveloperTools #OmniCore

I spent 2 hours debugging my React code today. The problem? I forgot to add a key prop inside .map() 2 hours. Gone. We always check the big things first — API calls, state management, component logic... But the bug is always something embarrassing Here are 3 mistakes I make almost every week — ❌ Forgetting key prop in .map() ❌ Calling setState and expecting instant update ❌ Spending 1 hour on a bug that console.log solves in 2 minutes 3 years of experience and I still do this Tell me your most embarrassing bug in the comments 👇 I promise I won't judge. We have ALL been there. #reactjs #javascript #frontenddeveloper #webdevelopment #coding #100daysofcode #programminghumor

Node.js Event Loop — One Concept Every Developer Should Know 🧠 Many developers get confused about this: Why does Promise run before setTimeout? Example 👇 console.log("Start"); setTimeout(() => console.log("Timeout"), 0); Promise.resolve().then(() => console.log("Promise")); console.log("End"); Output: Start → End → Promise → Timeout Why? Because JavaScript has 2 queues: ✔ Microtask Queue (Promises, async/await) ✔ Macrotask Queue (setTimeout, setInterval) Rule: 👉 Microtasks run before Macrotasks This is why Promise executes before setTimeout, even if timeout is 0ms. Understanding this helps in: ✔ Debugging async issues ✔ Writing better Node.js code ✔ Handling real-time applications 👇 Did this confuse you before learning event loop? #nodejs #javascript #eventloop #backenddeveloper #webdevelopment

One bad loop can freeze your entire server. Not slow it down. Freeze it. That’s the part most Node/NestJS devs underestimate 👇 We love saying “Node is non-blocking.” But that’s only true until you block it. The event loop can only move forward when your code lets it. If one task takes too long, everything else waits behind it. What actually blocks the event loop? • Synchronous operations • Heavy CPU work (large loops, calculations) • Huge JSON parsing or stringifying • Anything that keeps the call stack busy for too long Here’s the real problem: One heavy request doesn’t just slow itself down. It blocks every other user at the same time. One user clicks → everyone waits. Think of Node like a single cashier. If one customer takes 5 minutes, the whole line stops moving. No matter how many users you have — everything is stuck behind that one task. The event loop isn’t magic. It’s just fast… until you block it. #NodeJS #NestJS #BackendDevelopment #JavaScript #WebDevelopment #SoftwareEngineering #EventLoop #Performance #Scalability #Programming #CodingTips

Debugging is like being a detective in a movie where you’re also the murderer. 🕵️♂️ I spent 3 hours yesterday chasing a CSS layout bug that only appeared on Microsoft Edge Browser. It turned out to be a [mention a technical detail, e.g., z-index stacking context / flex-basis conflict Fixed it by React js Lessons learned: Trust your DevTools, not your eyes. Document the fix so the next dev (probably me in 6 months) doesn't suffer. What’s the most "logical" bug that drove you crazy recently? #Programming #FrontEndDev #ProblemSolving #SoftwareEngineering