Introduction to React
Jozef Spišiak

Start with Why
(Simon Sinek)

Source: https://insights.stackoverflow.com/survey/2019/#technology

Source: https://insights.stackoverflow.com/survey/2019/#most-loved-dreaded-and-wanted

Source: https://insights.stackoverflow.com/survey/2019/#most-loved-dreaded-and-wanted

Good salary

How to learn react?
● Write react code for simple apps. Dogfooding (using your own apps)
○ Example: track gym progress, daily diary, todo list
● Only write parts of app in react that make sense.
○ World of Tanks is written in C++ and Python, but uses React for UI
● Watch tutorials (thousands on the internet)
● Follow official react blog and blogs of react developers (@and_abramov,
@brian_d_vaughn)
● Attend conferences (@reactiveconf)

What is React?
● Open-source JavaScript library for building user interfaces
● Runs in browser and mobile devices (as React Native)
● Component based virtual DOM tree
● Declarative views for application state with no boilerplate
● Started by Facebook

Demo time!

● Community
● Documentation
● Tooling
● Easy to get started
Why not:
● Hate websites
● Don’t need UI
○ Data analysis, static information
display, video streaming
● Super light application

Example
projects done
with React
● Facebook
● WhatsApp
● Airbnb
● Netflix
● New York Times
● Dropbox
● Kiwi.com

About me
● Work for VacuumLabs for 2.5 years
● Worked in Sweden (Malmö) for 5 years and
3 in Bratislava before
● Studied FMFI UK Informatics Mgr.
● Worked with CMS, CRM systems, eshops
mostly PHP based
● Last 2 years React frontend
● Projects:
○ eset.com
○ kiwi.com
○ joj.sk
○ visitsweden.com
○ nazar.se
○ t3kit.com

Questions?

Thank you!