Table Of ContentMastering TypeScript
Build enterprise-ready, industrial strength web
applications using TypeScript and leading
JavaScript frameworks
Nathan Rozentals
BIRMINGHAM - MUMBAI
Mastering TypeScript
Copyright © 2015 Packt Publishing
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First published: April 2015
Production reference: 1170415
Published by Packt Publishing Ltd.
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ISBN 978-1-78439-966-5
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Credits
Author Project Coordinator
Nathan Rozentals Nidhi Joshi
Reviewers Proofreaders
Guy Fergusson Simran Bhogal
Remo H. Jansen Safis Editing
Andrea Martinelli Ameesha Green
Basarat Ali Syed
Indexer
Rekha Nair
Commissioning Editor
Edward Bowkett
Graphics
Abhinash Sahu
Acquisition Editor
Shaon Basu
Production Coordinator
Shantanu N. Zagade
Content Development Editor
Kirti Patil
Cover Work
Shantanu N. Zagade
Technical Editor
Tanmayee Patil
Copy Editors
Jasmine Nadar
Vikrant Phadke
About the Author
Nathan Rozentals has been writing commercial software for over 24 years.
Starting with mainframe COBOL, then moving on to C, followed by C++ and Java,
and finally settling on C# and ASP.NET. He has been working with and writing
blogs about the TypeScript language, since its release towards the end of 2012.
In TypeScript, he found a language through which he could bring all of the
object-oriented design patterns and unit testing practices that he had learned
over the years, through a variety of languages, to JavaScript.
Nathan currently works in the Health Industry, bringing touch-screen interfaces to
medical systems; thereby enabling Bring Your Own Device (BYOD) solutions for
clinicians and hospital staff. He is passionate about code quality, unit testing, and
Continuous Integration (CI) and has helped many large teams implement CI, across
many different software projects, in many different languages.
When he is not coding, Nathan loves windsurfing and playing soccer; he is also an
avid Liverpool FC supporter. You can find Nathan's blog at http://blorkfish.
wordpress.com.
Acknowledgement
I would like to thank my partner, Kathy, for her unconditional love and incredible
support over the years. You are simply the best and keep getting better. I am so
privileged to have you in my corner. To Matt, thanks for all the laughs, mate;
you are a great guy and have so much to give.
To Ayron and Dayna, I always look forward to hearing from you and finding out
about your many exploits. You are constantly in my thoughts and remember that
I will always be there for you. To Mum, Rach, Tash, and Tam, thanks for keeping
it real guys; there have been times when each of your individual talents has shone
through and given me such strength.
To the team at Health (Guy, Dave, Mike, Jeremy, Hardik, Steph, Paul, Marietta,
Chris, Wayne, Omar, Hieu, Jes, and yes, even you Kevin), thanks for the many
intense debates on all things concerned with software development, architecture,
testing, and delivery—we were truly an elite team.
Finally, to Dad, you have always been the voice of reason, the best listener, and
by far, the wisest man I have ever known. I am so proud of you, proud all that you
have done, in awe of all that you have achieved, and thankful for all that you have
taught us.
About the Reviewers
Guy Fergusson wrote his first program on the legendary Texas TI-99/4A in the
early eighties. After a successful career in the Royal Australian Air Force during the
nineties, he returned to programming in the first decade of the twenty-first century.
He has found a new passion in developing responsive web applications using the
latest .NET technologies. He was force-fed TypeScript by Nathan Rozentals, and
now he wouldn't touch JavaScript without it. He believes there's a future for the Go
language and hacks at it in his spare time.
Remo H. Jansen is a web development engineer, open source contributor,
entrepreneur, technology lover, gamer, and Internet enthusiast. He is originally from
Seville, Spain, but he currently lives in Dublin, Ireland, where he has a full-time job
in the funds industry.
Remo has been working on large-scale JavaScript applications for the last few years,
from flight booking engines to investment and portfolio management solutions.
He loves exploring the possibilities of the Web, learning about new and exciting
technologies, and joining knowledge-sharing events such as meets, conferences,
and hackathons.
Remo has recently started working as an author on an upcoming book on TypeScript
by Packt Publishing.
If you wish to contact him, you will be able to do so at www.remojansen.com.
Andrea Martinelli is a passionate software developer who is currently working
on shaman.io, a tool that automatically detects and extracts structured data from
the web.
In the past, he has worked on Songr, a music player and aggregator. His interests
span across web data extraction, semantic web, code performance and statically
typed languages. He is a proficient C# developer and has been interested in
TypeScript since its initial announcement. Andrea graduated from the University
of Trento in computer science and then studied at the Technical University of
Denmark, he is now dedicating more time on the shaman.io project, while
moving across Europe.
Basarat Ali Syed (BAS) is a senior developer and the go-to guy for frontend
at Picnic Software (http://picnicsoftware.com/) in Melbourne, Australia. He
studied master of computing at the Australian National University and graduated
with high distinction in all courses. He is a familiar face at developer meets and
conferences in Australia, and he has been a speaker at events such as ALT.NET, DDD
Melbourne, MelbJS, and Node.js meets among others. He is deeply passionate about
web technologies. He is a known member of the TypeScript community and works
on the DefinitelyTyped team (https://github.com/DefinitelyTyped). In his spare
time, he enjoys bodybuilding and cycling and maintains a YouTube channel for
helping fellow developers (http://youtube.com/basaratali).
He is the author of Beginning Node.js, Apress, and a reviewer of TypeScript Essentials,
Packt Publishing.
You can easily find him on http://twitter/basarat, http://github/basarat
and simply www.basarat.com.
I would like to thank my family Hasnain, Babar, Baqar, Taskeen and
my lovely wife Sana.
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Table of Contents
Preface ix
Chapter 1: TypeScript – Tools and Framework Options 1
What is TypeScript? 3
EcmaScript 3
The benefits of TypeScript 4
Compiling 4
Strong Typing 5
Type definitions for popular JavaScript libraries 6
Encapsulation 8
Public and private accessors 10
TypeScript IDEs 12
Visual Studio 2013 12
Creating a Visual Studio Project 13
Default project settings 14
Debugging in Visual Studio 15
WebStorm 17
Creating a WebStorm project 18
Default files 18
Running the web page in Chrome 22
Debugging in Chrome 23
Brackets 24
Installing Brackets 24
Creating a Brackets project 26
Using Brackets live preview 27
Creating a TypeScript file 28
Compiling our TypeScript 30
Using Grunt 30
Debugging in Chrome 33
Summary 34
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