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Typescript essentials

Typescript essentials

By : Christopher Nance
4 (4)
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Typescript essentials

Typescript essentials

4 (4)
By: Christopher Nance
Buy this Book

Overview of this book

The book introduces the TypeScript language and its features to anyone looking to develop rich web applications. Whether you are new to web development or are an experienced engineer with strong JavaScript skills, this book will get you writing code quickly. A basic understanding of JavaScript and its language features are necessary for this book.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Getting Started with TypeScript
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1. Getting Started with TypeScript
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The advantages of TypeScript
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Setting up the IDE
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Hello World
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Summary
2
2. TypeScript Basics
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2. TypeScript Basics
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Types
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Functions
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Interfaces
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Classes
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Interfaces
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Enums
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Modules
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Generic objects
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Summary
3
3. The TypeScript Compiler
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3. The TypeScript Compiler
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Generation of ECMAScript
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Controlling compiler output
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Advanced options
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Summary
4
4. Object-oriented Programming with TypeScript
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4. Object-oriented Programming with TypeScript
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The basics
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Understanding inheritance
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Encapsulation
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Abstraction
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Polymorphism
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References
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Summary
5
5. Creating a Simple Drawing Application
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5. Creating a Simple Drawing Application
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Setting up the project
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The shapes
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Making the application interactive
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Summary
6
6. Declaration Files and Library Integrations
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6. Declaration Files and Library Integrations
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Declaration files
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Third-party library integration
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Summary
7
7. Enhancing the Drawing Application
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7. Enhancing the Drawing Application
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Converting to AMD modules
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Binding the user controls
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Generating a single output file
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Styling the application
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Summary
8
8. Debugging TypeScript
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8. Debugging TypeScript
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Debugging
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Test-driven development
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Summary
9
Index
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Index

Understanding inheritance

Inheritance is the ability of a class to extend the functionality of an existing class. Inheritance creates a way for multiple objects to share a common core set of code and then extend or modify this as necessary for a specific purpose. Take for example our Shape class, which is very simple with a couple of properties in it, but these properties don't provide specific details as to what shape is actually being represented. In the following code, you can see we have modified the Shape class to be more generic and created a subclass using the extends construct in TypeScript:

interface IShape {
    location: IPoint;
    move(newLocation: IPoint);
}
class Shape implements IShape {
    public location: IPoint = new Point(0, 0);
    constructor() {
    }
    public move(newLocation: IPoint) {
        this.location = newLocation;
    }
}
interface IRectangle extends IShape {
    height: number;
    width: number;
    area(): number;
    resize(height: number, width: number...
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Typescript essentials
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