Let vs Var
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Lecture 171:- Let vs Var
let and var are both used to declare variables in JavaScript, but they differ in terms of their scoping and hoisting behavior.
var has function-level scope, which means that variables declared with var are only accessible within the function they are declared in or in the global scope if they are declared outside of any function. Also, variables declared with var are hoisted, which means that they are moved to the top of their scope and can be accessed before they are declared. This can sometimes lead to unexpected behavior.
On the other hand, let has block-level scope, which means that variables declared with let are only accessible within the block they are declared in, including nested blocks. Also, variables declared with let are not hoisted, so they cannot be accessed before they are declared.
Overall, let provides better scoping and a more predictable behavior compared to var, and is generally recommended for use in modern JavaScript development.
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- 2. Creating First HTML Page
- 3. HTML Page Structure
- 4. What We Plan to Build
- 5. Title Tag
- 6. Basic HTML Tags
- 7. Unordered Lists
- 8. Ordered Lists
- 9. Adding Lists to Blog page
- 10. Adding Image to Blog Page
- 11. Adding Header To Blog Page
- 12. Learning Anchor Tag Part 1
- 13. Learning Anchor Tag Part 2
- 1. What are Frontend Frameworks
- 2. Getting Started with Bootstrap
- 3. Adding Bootstrap to your Project
- 4. Bootstrap Breakpoints
- 5. Bootstrap Grid System
- 6. Code Using Bootstrap Grid System
- 7. Margin and Display Utilities
- 8. Other Utility Classes
- 9. Bootstrap Components
- 10. Modals
- 11. Collapse Component
- 12. Nav
- 13. Navbar
- 14. Jumbotron Template
- 1. What is Git
- 2. Git Commits
- 3. Git Commits Part 2
- 4. Git Understanding Branches
- 5. Git Making Branches
- 6. Git Merging Branches
- 7. Git Conflicts in Branches
- 8. Git Understanding Workflows
- 9. Pushing to github.com
- 10. Github With a Team Member
- 11. Git - Multiple Teams - Forking
- 12. Completing with PR Open Source Contribution
- 13. Pull Requests and Workflows of Large Teams
- 1. Const
- 2. Let
- 3. Let vs Var
- 4. For of loop
- 5. Smooth Scroll Demo
- 6. Smooth Scroll Hint 1
- 7. Smooth Scroll Hint 2
- 8. Smooth Scroll Solution
- 9. Another Approach to Write Code
- 10. Skill Bar Demo
- 11. Moving Ahead with Skill Bar Auto Fill
- 12. Competing Skill Bar Auto Fill
- 13. Counter Demo
- 14. Counter Hint
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- 2. This Keyword
- 3. This in Strict Mode
- 4. Function to create Objects
- 5. Constructor
- 6. Adding Behaviour to Objects
- 7. What is a Prototype
- 8. Why Prototypes
- 9. More Properties around Prototype
- 10. Objects
- 11. object vs Object()
- 12. Class
- 13. Class Expressions and Hoisting
- 14. Inheritance Using Classes
- 1. Server - What & How
- 2. Setting Up Our First Node.js Server
- 3. Serving a Response to the Browser
- 4. Understanding Responses
- 5. Serving HTML!
- 6. Reading and Serving HTML From a File
- 7. Nodemon, Automatic Server Restarts
- 8. Extending to Multiple Pages
- 9. Linking Pages & Mini Assignment
- 10. Summarizing!
- 1. Web Frameworks - A Quick Introduction
- 2. Understanding MVC Models, Views, Controllers
- 3. Why Express.js
- 4. Setting Up Express Server
- 5. Returning Response From The Server
- 6. HTTP Requests
- 7. Template Engines - What
- 8. Template Engines - Some Examples
- 9. Setting Up A Template Engine
- 10. A Quick Revision
- 11. Debugging Basics
- 12. Rendering Our First Page
- 13. Playing With EJS
- 14. Locals In Views
- 15. Summarizing
- 1. Introduction
- 2. Creating A Contact List
- 3. Sending Data To The Server
- 4. Parsing Form Data - Introduction
- 5. Parsing Form Data - Storing The Contact
- 6. Middleware - What and How
- 7. Accessing Static Files
- 8. Styling Our App
- 9. A Quick Revision
- 10. Query & String Parameters - Beginning
- 11. Query & String Parameters - Details
- 12. Deleting A Contact
- 13. Summarizing
- 1. Introduction
- 2. Setting Up Directory Structure
- 3. Starting Express
- 4. Adding Git and NPM Start
- 5. Setup the Express Router
- 6. Create a Controller
- 7. Create Another Controller and Router
- 8. Assignment adding more routes and controllers
- 9. Install EJS and Setup View Engine
- 10. Create a view for home
- 11. Summary
- 1. Introduction
- 2. Glancing through and Installing Passportjs
- 3. Setting up Passport.js
- 4. Express sessions and using passport for Authentication
- 5. Setting current authenticated user
- 6. Passing User data to views and restricting page access
- 7. Setting up Mongo store for session cookies
- 8. Creating Sign out
- 9. Summarizing
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- 2. Node.js - Explaining 1-1 and 1-M
- 3. Creating Schema for Posts
- 4. Saving Posts to the DB
- 5. Display Posts and related User
- 6. Check Authentication on Creating Post
- 7. Creating Schema for Comments
- 8. Adding Comments to the DB
- 9. Nested Population - Display Comment and Related User
- 10. Learning storage in SQL databases
- 11. Summarizing
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