RylandPM / Node-lecture-1

Node

• Student can create an index.js file
• Student can run a javascript file using node
• Student can run a javascript file using nodemon
• Student can describe that node is the V8 javascript engine
• Student can require and use other files in node

Servers

• Student can describe the role of servers in a client-server model
• Student can identify the parts of code that listen to external requests

NPM

• Student can npm init
• Student can npm install
• Student can npm install --save
• Student can describe the role of a package.json file
• Student can describe the purpose of the node_modules folder
• Student can .gitignore node_modules

Express

• Student can install and require express
• Student can start a basic express server by creating an app and listening on a port
• Student can write the handler function with the correct parameters req, res and next
• Student can access url parameters on req.params
• Student can set up an endpoint path to expect multiple params
• Student can use req.query
• Student can send data back with res.send and res.json
• Student can set a status code with res.status

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Node:

the V8 Javascript engine that runs outside of the browser

npm:

Node package manager

package.json

package.json is a config file from our application, it will have instructions on dependencies to download, and how node should run your application.

https://docs.npmjs.com/files/package.json

.gitignore

tells git which files not to push to github file/directories to be ignored

• node_modules
• .env (password file)
• anything you don't want on github

server:

computer or a device that provides a service to another machine

in general for us: a webserver is a program that can handle incoming requests and respond accordingly.

manages access to a centralized resource

todays centralized resource: data.json

params: typically stand for a particular resource looks like a normal path on the frontend

backend example: params denoted with a ":"

app.get(`/api/:id`);

access params

req.params.id;

query

typically used to maipulate/search data being accessed

frontend example denoted with a "?"

"https://localhost:4000/api/students?name=ryland";

access querys in endpoint function handler:

req.query.name;

client

a computer program that accesses a service made available by a server

server instructions:

• mkdir server
• touch index.js .gitignore
• npm init -y
• add node_modules => .gitignore
• npm i express
• require express
• declare app variable set = to express()
• declare port
• app.listen => port
• declare endpoint
• method - get
• path '/api...'
• handler => (req,res,next) => data to send
• test in browser