Locals In Views
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Lecture 255:- Locals In Views
In the context of a Node.js web application, "locals" refer to variables that are passed to the view or template engine for rendering. These variables contain the dynamic content that will be displayed to the user, such as data retrieved from a database, user input from a form, or calculations performed by the application.
When rendering a view, the Express framework provides a res.locals object that can be used to pass variables to the view. This object is available to all middleware functions that are called after the res.render() method is called.
Here's an example of using res.locals to pass a variable to a view:
javascriptCopy code
app.get('/', function(req, res) {
res.locals.title = 'My App';
res.render('index');
});
In this example, we set the title variable on res.locals to 'My App'. This variable can then be accessed in the view by using the title variable.
phpCopy code
<!DOCTYPE html>
<html>
<head>
<title><%= title %></title>
</head>
<body>
<h1>Welcome to <%= title %></h1>
</body>
</html>
In the view, we use the EJS templating engine to interpolate the title variable using the <%= %> syntax. This will render as "Welcome to My App" in the browser.
- 1. Intro To Html
- 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
- 1. Intro to Lecture
- 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
- 1. Introduction
- 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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