Debugging JavaScript with Chrome DevTools

As A Developer Stop memorizing code. Start understanding THIS 👇 Most beginners struggle not because coding is hard. But because they skip fundamentals. Focus on: ➡️ How browsers read HTML ➡️ Why CSS behaves unexpectedly ➡️ How JavaScript handles events 👉 Code is easy. Logic is everything. #webdeveloper #softwareengineer

Most JavaScript bugs aren’t about what you wrote… they’re about when it runs. ⏳ I recently came across a simple breakdown that perfectly explains why so many developers struggle with async behavior — and honestly, it’s a reminder we all need from time to time. Here are 5 core concepts every developer should truly understand: 🔹 Synchronous Your code runs line by line. One task must finish before the next begins. Simple, predictable… but blocking. 🔹 Asynchronous Tasks start now and finish later. JavaScript doesn’t wait — it keeps moving and comes back when results are ready. 🔹 Callbacks Functions passed into other functions to run later. Powerful, but can quickly turn into deeply nested “callback hell.” 🔹 Promises A cleaner way to handle async operations. They represent future values and allow chaining with .then() and .catch(). 🔹 Event Loop The real hero. It manages execution by moving tasks between the call stack and callback queue — making async possible in a single-threaded environment. 💡 TL;DR Synchronous = blocking Asynchronous = non-blocking Callbacks = old pattern Promises = modern approach Event Loop = the engine behind it all If you’ve ever been confused by unexpected execution order — this is likely why. 📌 Take a moment to revisit these fundamentals. It will save you hours of debugging down the line. What concept took you the longest to truly understand? Let’s discuss 👇 #JavaScript #WebDevelopment #Programming #Frontend #100DaysOfCode

🔗 Read the full article here: https://lnkd.in/guekBzpM 🚀 New Article Published: JavaScript Promises Explained for Beginners As a developer, handling asynchronous operations is something we deal with daily. Initially, callbacks helped solve this problem — but they often led to messy, hard-to-read code known as callback hell. That’s where Promises come in. In this article, I’ve broken down Promises in a simple and beginner-friendly way 👇 📌 What you’ll learn: • The problem Promises solve • Understanding Promise states: Pending, Fulfilled, Rejected • The Promise lifecycle explained clearly • Handling success using .then() • Handling errors using .catch() • Writing cleaner code with Promise chaining 💡 Bonus: ✔ Visual Promise lifecycle diagram ✔ Callback vs Promise comparison ✔ Real-world explanation of Promises as “future values” This article focuses on improving code readability, maintainability, and real-world understanding. Special thanks to the amazing mentors and community: Hitesh Choudhary Sir Piyush Garg Sir Akash Kadlag Sir Chai Aur Code I’d love your feedback and suggestions 🙌 #JavaScript #WebDevelopment #Programming #FrontendDevelopment #SoftwareEngineering #CodingJourney #AsyncProgramming #Developers

Day 10/100 of my #100DaysOfCode journey. Today I started learning one of the most important concepts in modern JavaScript — Promises. Key concepts I explored: • synchronous vs asynchronous code • how Promises work (pending → fulfilled → rejected) • handling async operations using .then() and .catch() To practice, I created a small example that simulates an API call using a Promise and setTimeout. One interesting realization: Automation frameworks interact with browsers and APIs constantly — both of which are asynchronous operations. Understanding Promises is essential before moving to async/await, which is heavily used in tools like Playwright. Next → rewriting these examples using async/await. #100DaysOfCode #SoftwareTesting #JavaScript #QAAutomation #LearningInPublic

🧠 When I first saw "async/await"… I thought: “Okay nice… just cleaner syntax.” I was wrong. It’s not just syntax. It’s how JavaScript thinks about time. --- If you’re a beginner or intermediate dev, you’ve probably faced this: ❓ “Why is this returning a Promise?” ❓ “Why is my console log running before my API?” ❓ “Why does my code feel slow even though it’s correct?” This is where most people get stuck. --- ✨ DAY 24: Async JavaScript (async/await) This guide is built to make things finally click. --- Here’s what you’ll walk away with 👇 🔹 A clear mental model of async vs sync (no more confusion) 🔹 How "await" actually pauses execution (and what it doesn’t) 🔹 Why your code doesn’t run top-to-bottom 🔹 How to handle errors like a pro using "try/catch" 🔹 The difference between slow vs optimized async code ⚡ 🔹 Real examples you’ll actually use in projects --- 💡 The biggest shift: You stop asking “Why is this not working?” And start understanding “Why this works the way it does.” --- This is one of those topics that feels hard… until someone explains it the right way. --- 📌 Save this (you’ll revisit it multiple times) 📌 Comment “CLEAR” if you want the next part 📌 Follow for simple, no-BS JavaScript learning #javascript #webdevelopment #frontenddeveloper #asyncawait #coding #programming #learninpublic #beginners #developers

I used to write long "for loops" for every small task. It worked, but the code was very hard to read and fix later. Today, I’m practicing a much better way to handle data using Array Methods. Instead of telling the computer every single step, I just tell it what result I want. Here are the three methods I use the most: .map(): I use this to change every item in a list at the same time. .filter(): This helps me choose only the specific items I need from a list. .reduce(): I use this to turn a whole list into one single result, like a total price. I am not a master yet, but my code is finally starting to look professional. Tomorrow, I will learn about Async/Await and how to handle waiting time in code. Question for you: Which one was the hardest for you to learn? For me, it was .reduce()! #CodeWithWajid #JavaScript #LearningToCode #100DaysOfCode #WebDev #BuildingInPublic

🚀 Harness the power of JavaScript Promises to handle asynchronous tasks like a pro! 🌟 Promises are objects that represent the eventual completion or failure of an asynchronous operation. Simply put, they help you manage the flow of your code when dealing with time-consuming tasks. For developers, mastering Promises is crucial for writing efficient and scalable code, ensuring smooth execution of operations without blocking the main thread. Let's break it down step by step: 1️⃣ Create a new Promise using the new Promise() constructor. 2️⃣ Within the Promise, define the asynchronous operation you want to perform. 3️⃣ Resolve the Promise with the desired result or Reject it with an error. Here's a code snippet to illustrate: ``` const myPromise = new Promise((resolve, reject) => { // Asynchronous operation let success = true; if (success) { resolve("Operation successful!"); } else { reject("Operation failed!"); } }); myPromise .then((message) => { console.log(message); }) .catch((error) => { console.error(error); }); ``` Pro Tip: Always remember to handle both the resolve and reject outcomes to ensure robust error management. 🛠️ Common Mistake: Forgetting to include the .catch() method to handle errors can lead to uncaught exceptions, so be sure to always implement error handling. ❓ What's your favorite use case for JavaScript Promises? Share in the comments below! 🌐 View my full portfolio and more dev resources at tharindunipun.lk #JavaScript #Promises #AsyncProgramming #WebDevelopment #CodeNewbie #DeveloperTips #LearnToCode #TechCommunity #BuildWithDevSkills

Small JavaScript bugs keep escaping to production and breaking critical user flows. Debugging inconsistent runtime behavior steals time from feature delivery. ────────────────────────────── Mastering Pick and Omit Utility Types in TypeScript Let's dive into how Pick and Omit can transform your TypeScript code! #typescript #utilitytypes #webdevelopment ────────────────────────────── Core Concept Have you ever found yourself needing just a subset of properties from an object? Or maybe you want to exclude certain properties? That's where TypeScript's Pick and Omit utility types come into play! How often do you use these in your projects? Key Rules • Pick allows you to create a new type by selecting specific properties from an existing type. • Omit enables you to create a new type by excluding certain properties from an existing type. • Both utilities help in maintaining cleaner and more manageable code by reducing complexity. 💡 Try This interface User { id: number; name: string; email: string; } type UserEmail = Pick<User, 'email'>; ❓ Quick Quiz Q: What utility type would you use to exclude a property from a type? A: Omit. 🔑 Key Takeaway Utilizing Pick and Omit can significantly streamline your TypeScript code, making it more readable and maintainable.

⚡ Why doesn’t setTimeout(fn, 0) run immediately? Most developers think JavaScript executes things in order… but that’s not always true. Let’s break it Example: console.log("Start"); setTimeout(() => console.log("Timeout"), 0); Promise.resolve().then(() => console.log("Promise")); console.log("End"); Output: Start End Promise Timeout What’s happening? JavaScript uses something called the Event Loop to handle async operations. Here’s the flow: Code runs in the Call Stack Async tasks go to Web APIs Completed tasks move to queues Event Loop pushes them back when stack is empty The twist: Microtasks (HIGH PRIORITY) • Promise.then() • queueMicrotask() Macrotasks (LOWER PRIORITY) • setTimeout() • setInterval() That’s why: Promise executes BEFORE setTimeout — even with 0ms delay Real takeaway: Understanding this can help you debug tricky async issues, optimize performance, and write better code. Have you ever faced a bug because of async behavior? #JavaScript #WebDevelopment #Frontend #Programming #Coding #Developers #100DaysOfCode

We’ve been working quite a bit with Date & Time handling in JavaScript lately… and if you’ve ever dealt with timezones, locales, or formatting, you already know how tricky it can get. So we decided to build something that makes this a bit more manageable. Introducing @creowis/intl-date-utils, a lightweight utility package built on top of the Intl API to handle common date and time operations more cleanly. The focus is simple: - Leverage native APIs instead of heavy dependencies - Keep it lightweight and practical - Make real-world use cases easier to handle This is open source, and we would genuinely love for the community to: 👉 Check it out 👉 Try it in your projects 👉 Share feedback 👉 Contribute if you find it useful Links are in the comments 👇 Curious to know how you currently handle Date & Time in your applications. #JavaScript #WebDevelopment #FrontendDevelopment #OpenSource #NPM #SoftwareEngineering #DevTools #DeveloperTools #WebDev #Programming #BuildInPublic #DeveloperCommunity