Intro to JavaScript

1. Intro to Javascript
September 2017
WIFI: In3Guest
http://bit.ly/tf-intro-js
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2. Instructor
Avi Zajac
Thinkful Full Time Student
Hacker
Rubik’s Cuber
Lockpicker
TAs
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3. About you
What's your name?
What brought you here today?
What is your programming experience?
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4. About Thinkful
Thinkful helps people become developers or data scientists
through 1-on-1 mentorship and project-based learning
bit.ly/tf-intro-jsWi-Fi: In3Guest
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5. Suggestions for learning
Don't get discouraged, struggle leads to masterystruggle leads to mastery
Don't be shy, take full advantage of our supporttake full advantage of our support
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6. Agenda
Learn key Javascript concepts (30 min)
Go over assignments (10 min)
Complete assignments with our support! (30 min)
Go over answer key (10 min)
Steps to continue learning (10 min)
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7. 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
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8. Client/Servers
Client (sends requests)
Frontend Developer
Manages what user sees
Server (sends response)
Backend Developer
Manages what app does
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9. Example: facebook.com
Client Server
Open browser
and navigate to
facebook.com
HTML, CSS, &
Javascrip render
newsfeed
Request
Response
Algorithm
determines
content of feed.
Sends back
HTML, CSS,
Javascript files
Application LogicApplication Logic
Initial requestInitial request
Following responseFollowing response
bit.ly/tf-intro-js
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Wi-Fi: In3Guest

10. Example: facebook.com
Client Server
Open browser
and navigate to
facebook.com
HTML, CSS, &
Javascrip render
newsfeed
Request
Response
Algorithm
determines
content of feed.
Sends back
HTML, CSS,
Javascript files
Application LogicApplication Logic
Initial requestInitial request
Following responseFollowing response
We'll be writing Javascript, the code
that the browser uses to run the app
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bit.ly/tf-intro-jsWi-Fi: In3Guest

11. History of Javascript
Written by Brendan Eich in 1995 for Netscape
Initial version written in 10 days
Completely unrelated to Java, but maybe named after it to
draft off its popularity
Over 10 years, became default programming language for
browsers
Continues to evolve under guidance of ECMA International,
with input from top tech companies
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12. Javascript today is extremely popular
Lots of job opportunities
Large community of developers, libraries and frameworks
Syntax is easier to understand for first-time developers
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13. Defining a variable with Javascript
var numberOfSheep = 20
Initialize variable
Name of variable
Value of variable
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14. Variable examples
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15. Declaring a function with Javascript
function greet() {
return "Hello world!";
}
Initialize function Name of function
What the function does
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16. Function examples
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17. If/Else Statements
go to gas stationkeep driving
if false if true
need gas?
family roadtrip
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18. If/Else Statements
function familyRoadtrip() {
if (needGas == true) {
getGas();
}
else {
keepDriving();
}
}
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19. Comparing Values
== (equal to)
5 == 5 --> true
5 == 6 --> false
!= (not equal to)
5 != 5 --> false
5 != 6 --> true
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20. If/Else Statements and Comparing Values
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21. Parameters within functions
function adder(a, b) {
return a + b;
}
adder(1,2);
Parameters in declaration
Parameters used
within the function
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22. Examples of parameters within functions
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23. Real developers use Google... a lot
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24. Repl.it setup & first steps!
http://bit.ly/tf-intro-js-challenges
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25. Ways to keep learning
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26. For aspiring developers, bootcamps fill the gap
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27. 91%91%
job-placement rate + job guarantee
Link for the third party audit jobs report:
https://www.thinkful.com/bootcamp-jobs-statshttps://www.thinkful.com/bootcamp-jobs-stats
Thinkful's track record of getting students jobs
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28. Our students receive unprecedented support
Learning Mentor
Career MentorProgram Manager
Local Community
You
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29. Mentorship enables flexible learning
Learn anywhere,
anytime, & at your own
pace
You don't have to quitYou don't have to quit
your job to startyour job to start
career transitioncareer transition
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30. Thinkful Two-Week Trial
Talk to one of us and email benjy@thinkful.combenjy@thinkful.com to learn more
Two-week Free course trial
Unlimited QA sessions
Start with HTML, CSS and JavaScript
Option to continue with full bootcamp
Financing & scholarships available
Offer valid for one week after eventOffer valid for one week after event
BenjyBenjy SchechnerSchechner
Education Advisor
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