Difference between map() and flatMap() in JavaScript

🚀 JavaScript Trick You Should Know! What do you think the result will be? 👇 "5" + 2 // ? "5" - 2 // ? ✅ "5" + 2 → "52" ✅ "5" - 2 → 3 Why? Because (+) combines strings, while (-) forces JavaScript to convert "5" into a number. A small example — but it shows how type coercion can completely change your output. ⚡ #JavaScript #FrontendDevelopment #CodingTips

Think you can start a new line after `return`? Cute. JavaScript's "helpful" semicolon insertion will stab you in the back. `return\n{ user: 'Gabo' }` becomes `return;`. Your function now silently returns `undefined`. The object vanishes. Is this a clever rule for cleaner code, or a silent logic-killer that semicolons exist to prevent? #GaboTips #JavaScript

𝐈 𝐛𝐞𝐭 𝐲𝐨𝐮 𝐝𝐢𝐝𝐧’𝐭 𝐤𝐧𝐨𝐰 𝐭𝐡𝐢𝐬… . . . There’s a 30-𝐲𝐞𝐚𝐫-𝐨𝐥𝐝 𝐛𝐮𝐠 in JavaScript — and it’ll never be fixed. 𝐭𝐲𝐩𝐞𝐨𝐟 𝐧𝐮𝐥𝐥 === "𝐨𝐛𝐣𝐞𝐜𝐭"; // 𝐭𝐫𝐮𝐞 🤯 This is not a quirk — it’s a mistake. When JS was created in 1995, 𝐧𝐮𝐥𝐥 was stored as all 0’s in memory. Objects also used 0 as a type tag. So JS confused them. Now fixing it would break the web. 💀 #JavaScript #ProgrammingHistory #WebDev #JavaScript #WebDevelopment #ProgrammingHistory

Favor functional components with Hooks. Cleaner syntax, easier logic, better readability. Class components are history. React Hooks changed everything. 🎣 #React #ReactHooks #FunctionalComponents #FrontendDevelopment #JavaScript

Hot take: 3+ nested callbacks = you're doing it wrong 🔥 Just published: "Understanding Asynchronous JavaScript: From Callbacks to Cleaner Code" Includes the workflow diagram everyone's been asking for 👇 https://lnkd.in/gcfBqVR7 #JavaScript #WebDev #DevTips

Daily JavaScript/React tip: Prefer async/await for clean, readable async code in JavaScript. In React, useEffect with a cleanup function helps prevent memory leaks when a component unmounts. Pro tip: keep effects focused and specify dependencies to avoid unnecessary re-runs. #JavaScript #React #WebDev

💻 JavaScript Fun Today! Here’s what I learned: 🎯 How to use variables (var, let, const) and understand their differences 🎯 How to interact with users using alert() and prompt() 🎯 Playing with strings, numbers, and template literals 🎯 Linking JS files to HTML and using defer for smoother loading 💬 Would love to hear your tips for making JS more interactive and fun! #JavaScript #WebDevelopment #Frontend #JSBasics #100DaysOfCode #LearningInPublic #BuildInPublic

Read an interesting article today about the debate: Vanilla JS vs Frameworks for smaller projects. Where do you draw the line As a beginner, I find Vanilla JS helps me understand the core concepts better Agree Disagree #JavaScript #FrontendDebate #WebDevelopment"

🚀 Just finished a small JavaScript project! I built a modal window that opens and closes when clicking buttons, the overlay, or pressing the Escape key. 🧠 This helped me understand: - querySelector / querySelectorAll - addEventListener - classList.add() and .remove() - Keyboard events like keydown Check out the full project on GitHub 👇 🔗 https://lnkd.in/euzZQVBA #JavaScript #WebDevelopment #Frontend #LearningInPublic #Makhilens

🎓 Here’s a quick project to practice DOM manipulation in JavaScript; 💡A toggle button for dark/light mode; 🧠What you’ll learn: How to use classList.toggle() in JavaScript; #WebDevelopment #JavaScript #HTML #CSS #FrontEnd #CodingPractice #DarkMode #LightMode #UITutorial #WebDesign #LearnToCode #WomenInTech #linkedinlearn