Book Image

Mastering TypeScript

By : Nathan Rozentals
Book Image

Mastering TypeScript

By: Nathan Rozentals

Overview of this book

<p>The TypeScript compiler and language has brought JavaScript development up to the enterprise level, yet still maintains backward compatibility with existing JavaScript browsers and libraries.</p> <p>Packed with practical code samples, this book brings the benefits of strongly typed, object-oriented programming and design principles into the JavaScript development space. Starting with core language features, and working through more advanced topics such as generics and modules, you will learn how to gain maximum benefit from your JavaScript development with TypeScript. With a strong focus on test-driven development and coverage of many popular JavaScript frameworks, you can fast-track your TypeScript knowledge to a professional level. By the end of this book, you will be able to confidently implement a TypeScript application from scratch.</p>

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Mastering TypeScript
Nathan Rozentals
Apr, 2015 | 364 pages
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Table of Contents (17 chapters)
Mastering TypeScript
Mastering TypeScript
Credits
Credits
About the Author
About the Author
Acknowledgement
Acknowledgement
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
TypeScript – Tools and Framework Options
TypeScript – Tools and Framework Options
What is TypeScript?
TypeScript IDEs
Summary
2
Types, Variables and Function Techniques
Types, Variables and Function Techniques
Basic types
Functions
Summary
3
Interfaces, Classes and Generics
Interfaces, Classes and Generics
Interfaces
Classes
Inheritance
The Factory Design Pattern
Class modifiers
Generics
Runtime type checking
Summary
4
Writing and Using Declaration Files
Writing and Using Declaration Files
Global variables
Using JavaScript code blocks in HTML
Writing your own declaration file
Module merging
Declaration Syntax Reference
Summary
5
Third Party Libraries
Third Party Libraries
Downloading definition files
Using NuGet
Using TypeScript Definition Manager
Using third party libraries
Backbone
Angular
Inheritance – Angular versus Backbone
ExtJs
Summary
6
Test Driven Development
Test Driven Development
Test Driven Development
Unit, integration and acceptance tests
Using continuous integration
Unit testing frameworks
Jasmine
Jasmine runners
Integration tests
Summary
7
Modularization
Modularization
CommonJs
Using AMD
Summary
8
Object-oriented Programming with TypeScript
Object-oriented Programming with TypeScript
Program to an interface
SOLID principles
Building a Service Locator
Dependency Resolution
A Service Locator
The Domain Events Pattern
Summary
9
Let's Get Our Hands Dirty
Let's Get Our Hands Dirty
Marionette
Bootstrap
Board Sales
Page layout
Data structure
Marionette application, regions and layouts
The State Design Pattern
Summary
Index
Index

Chapter 2. Types, Variables and Function Techniques

TypeScript introduces strong typing to JavaScript through a simple syntax, referred to by Anders Hejlsberg as "syntactic sugar".

This chapter is an introduction to the syntax used in the TypeScript language to apply strong typing to JavaScript. It is intended for readers that have not used TypeScript before, and covers the transition from standard JavaScript to TypeScript. If you already have experience with TypeScript, and have a good understanding of the topics listed below, then by all means have a quick read through, or skip to the next chapter.

We will cover the following topics in this chapter:

  • Basic types and type syntax: strings, numbers, and booleans

  • Inferred typing and duck-typing

  • Arrays and enums

  • The any type and explicit casting

  • Functions and anonymous functions

  • Optional and default function parameters

  • Argument arrays

  • Function callbacks and function signatures

  • Function scoping rules and overloads

Previous Section
End of Section 1
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