What is 🛗 Hoisting in Javascript скачать в хорошем качестве

What is 🛗 Hoisting in Javascript

Hoisting is a JavaScript mechanism where variables and function declarations are moved to the top of their scope, regardless of where they are actually defined. Variable Hoisting 1. *var*: Variables declared with `var` are hoisted to the top of their scope, and initialized with `undefined`. 2. let and *const*: Variables declared with `let` and `const` are hoisted, but not initialized until they are assigned a value. Example console.log(x); // Output: undefined var x = 10; console.log(y); // ReferenceError: Cannot access 'y' before initialization let y = 20; Function Hoisting 1. *Function declarations*: Function declarations are hoisted to the top of their scope. 2. *Function expressions*: Function expressions are not hoisted. Example foo(); // Output: "Hello" function foo() { console.log("Hello"); } bar(); // TypeError: bar is not a function var bar = function() { console.log("World"); } Best Practices 1. *Declare variables at the top*: Declare variables at the top of their scope to avoid confusion. 2. *Use let and const*: Use `let` and `const` instead of `var` to avoid issues with hoisting. By understanding hoisting, you can write more predictable and maintainable JavaScript code. 📒 Get Notes here: https://chat.whatsapp.com/GLJ3nFxD3K7... 🧑🏻‍💻 Get Code here: https://github.com/Aryan0-1Maurya 📌 Bookmark this Playlist:    • Javascript Mastery | Js for Beginners | Js...      • Web Development | Full Stack Development |...   🥳 Join our WhatsApp Community: WhatsApp group: https://chat.whatsapp.com/GLJ3nFxD3K7... 🚀 Follow me on: Instagram:   / amsrhub01   Linkedin:   / aryan-maurya-692047253   GitHub: https://github.com/Aryan0-1Maurya Codepen:https://codepen.io/aryan-maurya-amsr/ Facebook:https://www.facebook.com/profile.php?... Group:https://chat.whatsapp.com/GLJ3nFxD3K7... YouTube:   / @amsr-hub   Linktree: https://linktr.ee/amsrhub Hashtags: #coding #hoisting #javascript #programming Ignore these Tags: web development full course web development amsrhub web development roadmap web development aryan maurya roadmap for web development Javascript full course animation in js Javascript in web development beautiful website in web development Js basics Javascript in one video full stack web development course web development course web development roadmap 2024 web dev roadmap 2025 amsr hub css Js asmr hub aryan sir js coding front end developer roadmap anuj bhaiya web development full stack developer roadmap full stack web development roadmap web development roadmap 2024 web developer roadmap roadmap to web development backend web development best web development course web designing full course code with harry web development course apna college web development web development full course in hindi website development frontend developer roadmap web development projects front end developer course traversy media web development full stack web development full web development course full stack developer how to learn web development complete web developer course roadmap for front end developer web development anuj bhaiya complete roadmap for web development what is web development full stack developer course front end web development full course web development road map web developer course backend developer roadmap web developer roadmap 2024 android development front end developer complete web development course front end roadmap love babbar web development web dev javascript roadmap roadmap love babbar web development roadmap front end development tutorial web development tutorial website development course roadmap of web development web developer front end development roadmap web development aman dhattarwal web developer roadmap 2025 code with harry web development backend web development roadmap aman dhattarwal web development javascript full course web development for beginners android development roadmap java web development web devlopment html full course web development code with harry web development tutorial for beginners javascript tutorial web development projects web development projects for beginners web development projects for final year web development projects for resume web development project projects for resume mern stack projects for resume web dev projects full stack project