Intro to JavaScript: FUNdamentals (3/7/18)

1. Intro to JavaScript: FUNdamentalsIntro to JavaScript: FUNdamentals
March 2018
http://bit.ly/js­fun­lahttp://bit.ly/js­fun­la
Wi-Fi: Cross Camp.us Events
1

2. Instructor
Justin Ezor
Thinkful LA Community
Manager & Web Developer
TA's
2

3. About you
What's your name?
What brought you here today?
What is your programming experience?
3

4. About Thinkful
We train developers and data scientists through
1x1 mentorship and project-based learning.
Guaranteed.
4

5. Agenda
Learn key Javascript concepts
Go over assignments
Complete assignments with our support!
Go over answer key
5

6. How the web works
Type a URL from a client (e.g. google.com)
Browser sends an HTTP request asking for specific files
Browser receives those files and renders them as a website
6

7. Client/Servers
Client (sends requests)
Frontend Developer
Manages what user sees
Server (sends response)
Backend Developer
Manages what app does
7

8. Example: facebook.com
Client Server
Open browser
and navigate to
facebook.com
HTML, CSS, &
JavaScript render
newsfeed
Request
Response
Algorithm
determines
content of feed.
Sends back
HTML, CSS,
JavaScript files
Application Logic
Initial request
Following response
8

9. Example: facebook.com
Client Server
Open browser
and navigate to
facebook.com
HTML, CSS, &
JavaScript render
newsfeed
Request
Response
Algorithm
determines
content of feed.
Sends back
HTML, CSS,
JavaScript files
Application Logic
Initial request
Following response
We'll be writing JavaScript, the code
that the browser uses to run the app
9

10. Defining a variable with JavaScript
var numberOfSheep = 20var numberOfSheep = 20
Initialize variable
Name of variable
Value of variable
10

11. Variable examples
JSBin.com
11

12. Declaring a function with JavaScript
function greet() {function greet() {
return "Hello world!"; return "Hello world!";
}}
Initialize function Name of function
What the function does
12

13. Function examples
JSBin.com
13

14. If/Else Statements
go to gas stationkeep driving
if false if true
need gas?
family roadtrip
14

15. If/Else Statements
function familyRoadtrip() {
if (needGas == true) {
getGas();
}
else {
keepDriving();
}
}
15

16. Comparing Values
== (equal to)
5 == 5 --> true
5 == 6 --> false
!= (not equal to)
5 != 5 --> false
5 != 6 --> true
16

17. If/Else Statements and Comparing Values
JSBin.com
17

18. Parameters within functions
function adder(a, b) {function adder(a, b) {
return a + b; return a + b;
}}
adder(1,2);adder(1,2);
Parameters in declaration
Parameters used
within the function
18

19. Examples of parameters within functions
JSBin.com
19

20. Real developers use Google... a lot
bit.ly/intro-js-la
20

21. Repl.it setup & first steps!
bit.ly/tf-intro-js-challenges
21

22. Ways to keep learning
22

23. Thinkful's free resource
HTML, CSS and JavaScript
Unlimited group mentor sessions
Personal Program Manager
Student Slack Community
bit.ly/web-free-labit.ly/web-free-la
Web Development Fundamentals Course
23