The document provides steps to install and set up Node.js, create a simple server, and use Express. It introduces Node.js as a JavaScript runtime and shows how to verify installations by viewing responses at local URLs. It also demonstrates adding routes and query strings in Express, then consuming an external API.

1. Introduction to Node.js

2. Step 1
• Install Node.js
• Go to https://nodejs.org/en/
• Hit->

3. What is Node
• Node.js is a JavaScript runtime built on Chrome's V8
JavaScript engine.
• Node.js applications are written in JavaScript and can be run
within the Node.js runtime

4. Step 1 verification
• Open Command Prompt/terminal
• type “node -v”
• You should see “v4.1.1”

5. Step 2
• Create a Simple Server
• Create file “index.js” copy code
• run “node index.js”

6. Step 2 verification
• Open “http://127.0.0.1:1337/“ in browser
• You should see “Hello World”

7. Step 2a
• Instead of Hello World, write something else.

8. Step 2b
• Download ngrok -> https://ngrok.com/
• run ngrok 1337
• Go to Forwarding URL

9. Step 3 Express
• Go to http://expressjs.com/

10. Step 3 Express
• Go to http://expressjs.com/

11. • Copy code to index.js
• run “npm install express”
• run “node index.js”
• Open Browser- > “localhost:3000”

12. Step 3 verification
• Open Browser- > “localhost:3000”
• You should see “Hello World”

13. Step 3 more
• Try to create another route
• e.g.
• Browser ->“localhost:3000/Justin” should display
“Hello Justin”

14. Step 4 Query String
app.get('/print', function (req, res) {
res.send(req.query);
});

15. Step 4 Query String
• A query string is the part of a uniform resource
locator (URL) containing data that does not fit
conveniently into a hierarchical path structure
• Browser ->
“http://localhost:3000/print?Name=Justin”

16. Step 4a) Query String
Try to print just the Name

17. Step 4 Query String
app.get('/print', function (req, res) {
res.send(req.query);
res.send(req.query.Name);
});

18. Step 5
Consume an API
• Browser-> “http://ppd.io/htp”
• Download Zip
• run “npm install”
• run “node app.js”