Introduction to Express Js | Sigma Web Development Course - Tutorial #88

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00:01 Express Js is a framework for web development using Node.js
02:12 Express is a framework designed to simplify server-side JavaScript development
04:20 Using npm to install different versions of Express
06:12 ExpressJs basics and handling requests
07:59 Introduction to request parameters and queries in Express Js
09:59 Express Js provides good utilities for creating maintainable endpoints and managing database connections.
11:56 Express.js allows to access URL parameters and query parameters using request params
13:54 Understanding the request object in ExpressJS
16:19 Introduction to Express Js and serving static files
18:32 Express is designed to simplify website development

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[Hafijur]

🎯 Key Takeaways for quick navigation:

00:00 📝 *Introduction to Express JS*
- Overview of Express.js and its importance in web development.
- Express.js helps in building production-level web applications.
00:36 🛠️ *Agenda Overview*
- Discussing the agenda for the video, including understanding Express.js and why it's used.
- Overview of a basic server created using Express.js.
01:13 🔄 *Server Restart Issue*
- Demonstrating a server restart issue where manual restart is required.
- Resolving the restart issue using npm's `nodemon` package.
01:54 📂 *Project Structure and Setup*
- Setting up an Express.js project using npm.
- Creating an initial project directory and installing Express.js.
03:39 🔄 *Express.js Updates*
- Discussion on Express.js updates, particularly version 5, and its minor changes.
- Mention of changes like capitalizing "D" in "sendFile" and other minor improvements.
04:34 📦 *Installing Express*
- Installing specific versions of packages using npm.
- Importance of referring to documentation for frameworks.
- Demonstrating how to install and set up Express.
05:45 📂 *Exploring Express basics*
- Importing and initializing Express.
- Setting up route handlers with `app.get`.
- Handling requests and responses with route handlers.
07:52 🔄 *Planning for next topics*
- Discussing the next topics: request parameters and queries.
- Planning to create different pages for an application: about, contact, etc.
08:21 📝 *Overview of writing content in Express.js*
- Overview of writing content in Express.js,
- Explains writing 'Hello', 'Contact', and 'About' content in Express.js, and the purpose of using 'Hello' and 'Contact' in the code.
09:02 🔍 *Explanation of code execution in Express.js*
- Demonstrates how to use endpoints like '/about' and '/contact' in Express.js,
- Shows how to handle errors in Express.js when endpoints are not defined properly,
- Discusses the importance of managing endpoints efficiently in Express.js.
09:43 💻 *Writing blogs in Express.js*
- Demonstrates writing a blog in Express.js,
- Discusses the process of writing an 'Introduction to JS' blog in Express.js,
- Mentions the possibility of writing an 'Introduction to Python' blog in Express.js.
12:30 🧩 *Parsing Request Parameters in Express*
- Demonstrates how to parse request parameters in Express.
- Uses the `req.params` object to access parameters from the URL.
- Shows how to define multiple parameters and access them in the request handler.
13:39 🔄 *Handling Query Parameters in Express*
- Discusses how to handle query parameters in Express.
- Explains the use of `req.query` object to retrieve query parameters.
- Demonstrates the process of setting query parameters in a URL.
15:01 🚦 *Controlling the Route Flow*
- Shows how to control the flow of routes based on query parameters.
- Uses the example of setting a dark or light mode for rendering a website.
- Demonstrates how to use `req.query` to pass parameters in the URL.
16:30 🔍 *Reviewing URL and Query Parameter Handling*
- Reviews the handling of URLs and query parameters in Express.
- Shows how to update and access URLs using `req.params` and `req.query`.
- Demonstrates logging and outputting request parameters for debugging purposes.
17:11 🔄 *Request and query parameters in Express.js*
- Explanation of request.query and request.params in Express.js.
- Overview of how to process and use request parameters in Express.js.
- Introduction to custom logic for processing request parameters.
17:40 📁 *Serving static files in Express.js*
- Instructions on serving static files using Express.js.
- Demonstrates how to use the "static" section in Express.js to serve static files.
- Explanation of using the "use" middleware in Express.js for serving static files.
18:32 🔒 *Importance of using the correct package to avoid errors in Express.js*
- Emphasis on using the correct packages, like "http" and "express", to avoid errors.
- Explanation of how using incorrect packages can lead to mistakes in code.
- Importance of using Express.js for building production websites.
19:31 🚫 *Avoiding mistakes when serving static files in Express.js*
- Demonstrates the correct way to serve static files in Express.js to avoid mistakes.
- Explanation of how placing files in the wrong directory can lead to errors.
- Importance of correctly configuring static file serving in Express.js.

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another day thanking this guy effort kia baat ha harry bhai genius

[kiranmal]

you are awesome break every concept in easier manner thank you so much for provide valuable content to us.

[CosmoMaximilian]

I am facing a issue that when I'm making changes , it doesn't changes live without saving the js files repeatedly i have to press ctrl + s to save the file then its taking effect on reload . I have reinstalled nodemon after uninstalling then also ... what to do ... 🙏🙏🙏🙏🙏🙏🙏🙏

[shivcharanbarai]

That's the way you raise the bar like anything 😎🥰

[ayushdaharwal]

Harry bhai please make a video on how to use Microsoft word and how to make ppt, presentation etc. and features of Microsoft word and excels ...it's a humble request from 1st year btech student please ....

[mastercodes]

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[Polash]

Guru ji o guru ji guru ji ap sunrahe ho ap kamal o guru ji😂😂😂 Love you new Python and JS courses.💖💗Golpi dil, 💗 golapi dil.

[T.Akshay_Pratap_Singh]

19:16 nhii hogi serve package.json until or unless hum usse public folder k andhar na rakhein

[AmanTheDisciple]

Duniya ko loot denge indians khatarnak developers bnke aise to XD

[MdKaif-iopm]

Thank u so much bhai, now i can say i know the Express littllebit

[ywwcfyu]

#SigmaBatchOp Harry bhai, are you also going to teach typescript? (please...)