Find Unique Characters in String with JavaScript

Two lines. Same numbers. Completely different outputs 🤯 👉 "console.log(1 + 2 + "3");" 👉 "console.log("1" + 2 + 3);" Looks simple… but JavaScript has its own way of thinking 👀 Are you sure you know what the output will be? I made a quick video breaking this down — and trust me, it’s NOT what most people expect 🚀 Watch till the end to understand how JavaScript actually evaluates expressions and why order matters more than you think! #JavaScript #WebDevelopment #Coding #Frontend #Developers #JSBasics

JavaScript has exactly 6 falsy values. Memorize them: 1. false 2. 0 3. "" (empty string) 4. null 5. undefined 6. NaN Everything else is truthy. even these: [] ✓ truthy {} ✓ truthy "0" ✓ truthy "false" ✓ truthy -1 ✓ truthy Understanding this helps avoid many logical bugs. #react #frontend #javascript

Two lines. Same numbers. Completely different outputs 🤯 👉 "console.log(1 + 2 + "3");" 👉 "console.log("1" + 2 + 3);" Looks simple… but JavaScript has its own way of thinking 👀 Are you sure you know what the output will be? Watch till the end to understand how JavaScript actually evaluates expressions and why order matters more than you think! #JavaScript #WebDevelopment #Coding #Frontend #Developers #JSBasics

React is killing complex logics day by day more better code optimization and better performance New React pattern (use() + async support): #ReactJS  #FrontendDevelopment  #WebPerformance #LearningInPublic  #JavaScript  #Consistency

Things wish knew when I started frontend: -The browser is your best debugging tool. Learn DevTools deeply. - CSS isn't broken. You just don't understand the box model yet. - JavaScript fundamentals matter more than any framework. -Your first 10 projects will be ugly. Ship them anyway. Number 4 is the one most people skip. #Frontend #WebDevelopment #JavaScript #CSs #DevLife #SoftwareEngineering Serah ABIJO

🚀 Top JavaScript Features Every Developer Should Know (2026) JavaScript is evolving fast, and staying updated is key 🔥 Here are some powerful features I’ve been using recently: ✅ Optional Chaining ("?.") Access deeply nested properties safely without errors const name = user?.profile?.name; ✅ Nullish Coalescing ("??") Better default values than "||" const count = value ?? 0; ✅ Promise.allSettled() Handle multiple API calls without failing everything const results = await Promise.allSettled(promises); ✅ Top-Level Await No need for async wrapper in modules const data = await fetch(url); ✅ Array.at() Clean way to access elements (even from end) arr.at(-1); ✅ StructuredClone() Deep copy objects easily const copy = structuredClone(obj); 💡 These features help write cleaner, safer, and production-ready code. 👉 Which one do you use the most? #JavaScript #WebDevelopment #Frontend #NodeJS #Coding #Developers

Null vs Undefined: JavaScript's Twin Voids – What's the Difference?.................. In JavaScript, null and undefined both represent emptiness, but they have distinct meanings. undefined is the default value for uninitialized variables, missing function arguments, or non-existent object properties – it signals that a value hasn't been assigned. null, on the other hand, is an intentional assignment used to explicitly indicate "no value" or an empty object reference. A quirky historical bug makes typeof null return "object", while undefined is a proper type. They are loosely equal (null == undefined), but strictly different (null === undefined is false). Both are falsy, yet null converts to 0 in arithmetic, while undefined becomes NaN. In JSON, null is preserved, but undefined properties are omitted. Mastering this distinction prevents subtle bugs in everyday web development. #webdev #javascript #programming #coding #developer #frontend #backend #fullstack #js #webdevelopment #softwareengineering #tech

React is killing complex logics day by day more better code optimization better performance new React pattern (use() + async support): #ReactJS #FrontendDevelopment #WebPerformance #LearningInPublic #JavaScript #Consistency

React is killing complex logics day by day more better code optimization better performance new React pattern (use() + async support): #ReactJS #FrontendDevelopment #WebPerformance #LearningInPublic #JavaScript #Consistency