Introduction

• This repository, i store my node.js exercises.
• Here i take keynotes for exercises.

Exercise-1 & 2 // Node.js

• Basics of http module.
• Creating server.
• Event loops and server.listen() methods.
• Request Handler term.
• Taking requests. With req.url and req.method, setting responses.
• Response writing with res.write(), HTML codes.
• Buffer and chunk terms. taking data with chunks using req.on and parsing it.
• Modifying headers and status code.
• Modules, exporting modules and import from another file.

Exercise-3,4,5 // Express.js

• Introduce to express.js and practising
• Middleware concept, how works them and handling requests.
• Setting up middlewares with use() get() post() methods.
• body-parser package for parsing.
• Filtering paths on middlewares.
• Difference of next() and res() methods on middlewares.
• Instead of res.write() method, res.send() method and its auto content-type setting.
• For redirecting, .redirect("/path") method.
• Using express router (express.Router()) and moving middlewares on the other folders. Exporting router.
• Adding 404 Page for getting benefit of "/" general path handling concept of express.js.
• Creating HTML files and linking onto express server without template engines.
• Helper function concept for navigation.
• Serving static files like css files on public folder.

Exercise-6 // Template Engines - Pug

• Introduced to templating engines and their working principle.
• Popular template engines: EJS, Pug, Handlebars
• Worked with pug.
• Installing, implementing pug and configuration
• Setting "views" folder and creating .pug files
• Builded template with pug syntax, used them in middlewares with res.render() method.
• Working with dynamic contents
• Outputting simple text, list and conditional statements (loops and if statements) with pug
• Building layouts with pug

Exercise-7,8 // Template Engines - HandleBars & EJS

• Registering template engines which not pre-built with express.js (like handlebar) with using .engine()
• HTML-like syntax of handlebars
• Loops and conditional statements with handlebars
• Passing conditional logics to handlebars files from .js files as boolean
• Building layouts with handlebars {{{ }}}
• HTML-like syntax of EJS and using Javascript syntax building loops and if conditionals.
• Because EJS does not support building layouts, using partials/includes for getting benefit from layout-like features.

Exercise-9 // Practising

• For exercise made mini website that has 4 pages; main, user-list, error, thank-you page.
• Used express.js and all the GET request for these pages handled with middlewares
• Main page has simply has subscription form with name, surname and email fields
• Submiting form sends POST request and redirect to the thank-you page.
• User List page output all the user inputs current session from main page
• Any non-existed urls shows error page.
• For POST request, body-parser helped with the parse the data.
• Nodemon implemented.
• Used EJS for templating and making layout

Exercise-10 // MVC Concept

• The MVC Concept : Model-View-Controller
• Middleware logics are in Controller
• Defining request and response mechanism in Controller
• Models created, data structure and storing/fetching them coded.
• Controller takes inputs from View with coming user request
• Controller manipulates Model Data that came from View
• Controller updates View with fetching data from Model