Learn what callback functions are in JavaScript and why they're essential! In this quick 60-second tutorial, I break down callbacks with simple examples. Callback functions are the foundation of array methods like forEach, map, and filter. Understanding them is crucial for

How JavaScript developers fixed closure bugs BEFORE ES6! 😱 Back in 2010, we had to use IIFE (Immediately Invoked Function Expressions) to solve closure problems. Now with ES6, we just use let! 💡 What you'll learn: 📜 Old JavaScript patterns (pre-ES6) ✨ Modern ES6+ solutions

"Why should I learn Higher Order Functions?" 🤔 Because you're ALREADY using them every single day! Every time you write: 📌 .map() 📌 .filter() 📌 .forEach() 📌 .reduce() You're using Higher Order Functions! These methods take functions as arguments. Understanding HOFs helps

The Calculator Test - Is Your Function Pure? 🧮 Easy trick: If it doesn't work like a calculator, it's not pure! A calculator always gives the same result: 5 + 3 = 8 (every single time) Your function should too! ✅ ❌ Depends on time? Not pure ❌ Depends on external

🤯🤯😲😲🦸🦸🦸‍♂️

WoW!

⚠️ STOP making this JavaScript scope mistake! ❌ Trying to access inner function variables from the outer function = ERROR ✅ Accessing outer variables from an inner function = WORKS Golden rule: Inner functions can look UP to parents, but parents can't look DOWN to children!

Why CONST for functions? 🤔 Prevents accidental changes! 🛡️ Pro developer habit! 💪 Follow for more tips! #javascript #coding #programming #webdev #learntocode

JavaScript Interview Question - Can you solve it? 🤔 This closure + var scope question trips up 90% of junior developers! But after watching this, you'll never get it wrong again. 📝 Interview Topics Covered: ✅ Closures in loops ✅ var vs let scope ✅ setTimeout behavior ✅

This is one of the most powerful patterns in JavaScript. The createMultiplier function returns a NEW function each time you call it. Result? You can create infinite specialized functions from one template! ♾️ This pattern is used in: 🔹 React hooks 🔹 Event handlers 🔹 Factory

What Are Side Effects in JavaScript? 🤔 Side effects = anything your function does BEYOND returning a value Common side effects: ❌ Console logging ❌ API calls ❌ DOM manipulation ❌ Modifying variables ❌ Writing to files Pure functions only return values ✅ Understanding

🔐 Secret trick: Create PRIVATE variables in JavaScript using inner functions! This technique (closures – covered in the next lesson!) lets you: ✅ Protect data from outside access ✅ Create controlled interfaces ✅ Prevent accidental modifications The variable is

Introducing shadcn/create – Build your own shadcn/ui Customize Everything. Pick your component library, icons, base color, theme, fonts and build something that doesn’t look like everything else. Now available for Next.js, Vite, TanStack Start and v0.

Functions return ANYTHING! 🎯 Numbers, strings, arrays, objects, even functions! JavaScript is powerful! 🚀 #javascript #coding #programming #webdev #learntocode

Create PRIVATE variables in JavaScript using closures! 🔒 This technique is used by professional developers in real production code. Learn how to hide data and create true encapsulation in JavaScript! 💡 Why this matters: ✅ Data privacy and security ✅ Prevent accidental

The MOST COMMON JavaScript closure bug! 🐛 Why does this loop print 4, 4, 4 instead of 1, 2, 3? It's all about closures and variable scope! 🔑 Key Lesson: Always use let or const in loops, never var! 💡 What you'll learn: ❌ Why var causes this problem ✅ How let fixes it

🚨BREAKING: New Model & WebDev Leaderboard Update! GPT-5.2 by @OpenAI has officially made its debut in the Arena, appearing on the WebDev leaderboard. Current leaderboard standings: 🥈 #2 for GPT-5.2-high in WebDev (score: 1486) 🔹 #6 for GPT-5.2 in WebDev (score: 1399)

It is a very smart model, and we have come a long way since GPT-5.1:

JavaScript Closures explained in 30 seconds! 🚀 A closure is when a function remembers variables from its outer scope, even after that outer function has finished executing. It's one of the most powerful features in JavaScript! 💡 In this short: ✅ Simple closure example ✅ How

We re-architected Neon Auth to integrate it directly into the Neon platform. Auth now lives in your Postgres database and branches with your data. Built on @better_auth tech and available today 🧵