Async/Await in JavaScript for Automation Engineers

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

TypeScript’s type system is far more than autocomplete and safety nets. Type-level programming unlocks a different way of thinking: using the type system itself to model rules, derive behavior, and catch whole classes of bugs before runtime. Lately I’ve been spending more time with: - advanced generics for reusable, expressive APIs - conditional types for branching logic at the type level - `infer` for extracting types from functions, tuples, promises, and nested structures - mapped types for transforming object shapes - template literal types for building strongly typed string patterns - variadic tuple types for preserving function signatures - utility types that turn complex domain logic into developer-friendly primitives A few examples of where this becomes powerful: → building API clients that infer request/response shapes automatically → creating form helpers that stay perfectly in sync with validation schemas → designing component libraries with safer props and better DX → encoding business constraints so invalid states become unrepresentable The best part: good type-level programming doesn’t make code “clever.” It makes code easier to use correctly. That said, there’s a balance. If the types are harder to understand than the implementation, the abstraction probably needs work. The goal isn’t “more advanced types.” The goal is clearer contracts, stronger guarantees, and a better developer experience. TypeScript gets really interesting when types stop being annotations and start becoming architecture. #TypeScript #JavaScript #WebDevelopment #Frontend #SoftwareEngineering #DeveloperExperience #Programming #TypeSafety #WebDevelopment #TypeScript #Frontend #JavaScript

Understanding JavaScript Execution Context changed how I debug code 👇 At first, JavaScript feels straightforward. But when things don’t behave as expected, execution context is usually where the answer lies. Every time a function runs, JavaScript creates a new execution context. Inside it: • Variables are created • Functions are stored • `this` is determined And all of this happens before the code actually executes. That’s why things like hoisting and scope behave the way they do. This behaves differently than many expect. Once I understood this, debugging became much clearer. Sometimes the problem isn’t the code, it’s understanding how JavaScript runs it. #JavaScript #ExecutionContext #FrontendDevelopment #SoftwareEngineering #Programming #LearningInPublic

📌 Promises in JavaScript A Promise represents the eventual completion or failure of an asynchronous operation It has three states: pending, fulfilled, and rejected .then() handles successful outcomes .catch() handles errors Helps avoid callback hell and improves code readability 👉 Use case: API calls, asynchronous data handling #JavaScript #Promises #AsyncProgramming #WebDev #Coding

🚀 Day 7 / 30 - JavaScript Coding Practice Today’s challenge: Recreating the Array.map() functionality — without actually using it 👀 Problem: Apply a transformation function to each element of an array and return a new array. 💡 Key Insight: This problem helped me understand what’s happening under the hood of built-in methods like map(). 👉 Instead of relying on .map(), I used a loop to: Iterate through each element Apply the given function with both value & index Build a new transformed array Solution: var map = function (arr, fn) {     let transArr = []     arr.forEach((element, i) => {         transArr.push(fn(element, i) ?? element);     });     return transArr; }; #JavaScript #DSA #CodingPractice #100DaysOfCode #FrontendDevelopment #ProblemSolving

Understanding JavaScript arrays changed how I think as a developer. Coming from a teaching background I thought coding was memorizing syntax. Feeling a level of guilt when I pulled out my cheat sheet. But working with arrays like .map( ) and .reduce( ) helped me make a lasting connection. It’s not about memorizing code. It’s about solving problems efficiently. Instead of looping manually, I can transform and analyze data in a much cleaner way. If you’re learning JavaScript, stick with it until it clicks! Now I focus less on memorizing and more on understanding patterns. #SoftwareDeveloper #Tech #FullStack #JavaScript #SoftwareEngineer #WebDevelopment #MERNStack

Wrote a new blog on Synchronous vs Asynchronous JavaScript Covering: • What synchronous code actually means • How asynchronous code works behind the scenes • Blocking vs non-blocking execution • Why JavaScript needs async behavior • Real-world examples like API calls and timers • Problems caused by blocking code • A simple mental model of the event loop https://lnkd.in/g5pv2Wnz #JavaScript #WebDevelopment #FrontendDevelopment #AsyncJS #100DaysOfCode #Programming #Coding #Developers

🚀 TypeScript Operators Made Simple – A Must-Know for Every Developer! Understanding operators is essential when writing logic in TypeScript. They are the building blocks that help you perform calculations, comparisons, and decision-making in your code. Let’s simplify it 👇 🔹 1. Arithmetic Operators Used for basic calculations 👉 + Addition 👉 - Subtraction 👉 * Multiplication 👉 / Division 👉 % Modulus (remainder) 👉 ** Exponentiation 🔹 2. Assignment Operators Shortcuts to update values 👉 +=, -=, *=, /=, %= 🔹 3. Increment & Decrement 👉 ++ Increase value by 1 👉 -- Decrease value by 1 💡 Pre & Post usage matters in execution flow! 🔹 4. Comparison Operators Used to compare values 👉 <, >, <=, >= 👉 == (value check only) 👉 === (value + type check ✅ Recommended) 🔹 5. Logical Operators Combine multiple conditions 👉 && (AND) 👉 || (OR) 👉 ! (NOT) 🔹 6. Ternary Operator A clean shortcut for if-else 👉 condition ? trueValue : falseValue 💡 Pro Tip Always prefer === over == to avoid unexpected type conversion issues and write more predictable code. 🔥 Why This Matters? Operators are everywhere—from simple calculations to complex business logic. Mastering them helps you write efficient, clean, and bug-free code. 💬 Which operator do you use the most in your daily coding? #TypeScript #JavaScript #Programming #WebDevelopment #Coding #Developers #SoftwareDevelopment #AutomationTesting #SDET #QALife #TechLearning #CodeBetter #ProgrammingBasics #LearningJourney #TechSkills

Closures in JavaScript felt confusing, until they didn’t 👇 At first, it’s hard to understand how a function can “remember” variables even after execution. But that’s exactly what closures do. A closure is created when a function retains access to its lexical scope, even after the outer function has finished executing. Even though `outer()` has finished execution, the inner function still has access to `count`. That’s the power of closures. They are widely used for: • Data encapsulation • Maintaining state • Creating reusable functions Understanding closures makes many JavaScript patterns much clearer. #JavaScript #Closures #FrontendDevelopment #SoftwareEngineering #Programming

Small JavaScript bugs keep escaping to production and breaking critical user flows. Debugging inconsistent runtime behavior steals time from feature delivery. ────────────────────────────── Mastering ReturnType and Parameters Utilities in TypeScript Let's dive into TypeScript's ReturnType and Parameters utilities. Are you using them effectively? #typescript #development #coding #utilities ────────────────────────────── Core Concept Have you ever wondered how to derive types from functions in TypeScript? ReturnType and Parameters utilities can simplify your type definitions and enhance your code's readability. Key Rules • ReturnType<T>: Extracts the return type of a function type. • Parameters<T>: Gets the parameter types of a function type as a tuple. • Both utilities help in creating more maintainable and type-safe code. 💡 Try This type MyFunction = (x: number, y: string) => boolean; type MyReturnType = ReturnType<MyFunction>; // boolean type MyParameters = Parameters<MyFunction>; // [number, string] ❓ Quick Quiz Q: What does Parameters<T> return? A: A tuple of the parameter types of the function T. 🔑 Key Takeaway Leverage ReturnType and Parameters to create clearer, more maintainable TypeScript code!