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TypeScript
TypeScript
Notes for Professionals
Notes for Professionals
of professional hints and tricks
80+ pages
GoalKicker.com
Free Programming Books
Disclaimer
This is an unocial free book created for educational purposes and is
not aliated with ocial TypeScript group(s) or company(s).
All trademarks and registered trademarks are
the property of their respective owners
Contents
About
................................................................................................................................................................................... 1
Chapter 1: Getting started with TypeScript
.................................................................................................... 2
Section 1.1: Installation and setup
................................................................................................................................. 2
Section 1.2: Basic syntax
............................................................................................................................................... 4
Section 1.3: Hello World
................................................................................................................................................. 5
Section 1.4: Running TypeScript using ts-node
.......................................................................................................... 6
Section 1.5: TypeScript REPL in Node.js
....................................................................................................................... 6
Chapter 2: Why and when to use TypeScript
................................................................................................. 8
Section 2.1: Safety
.......................................................................................................................................................... 8
Section 2.2: Readability
................................................................................................................................................ 8
Section 2.3: Tooling
....................................................................................................................................................... 8
Chapter 3: TypeScript Core Types
....................................................................................................................... 9
Section 3.1: String Literal Types
.................................................................................................................................... 9
Section 3.2: Tuple
........................................................................................................................................................ 12
Section 3.3: Boolean
.................................................................................................................................................... 12
Section 3.4: Intersection Types
.................................................................................................................................. 13
Section 3.5: Types in function arguments and return value. Number
................................................................... 13
Section 3.6: Types in function arguments and return value. String
....................................................................... 14
Section 3.7: const Enum
.............................................................................................................................................. 14
Section 3.8: Number
.................................................................................................................................................... 15
Section 3.9: String
........................................................................................................................................................ 15
Section 3.10: Array
....................................................................................................................................................... 16
Section 3.11: Enum
........................................................................................................................................................ 16
Section 3.12: Any
.......................................................................................................................................................... 16
Section 3.13: Void
......................................................................................................................................................... 16
Chapter 4: Arrays
....................................................................................................................................................... 17
Section 4.1: Finding Object in Array
........................................................................................................................... 17
Chapter 5: Enums
........................................................................................................................................................ 18
Section 5.1: Enums with explicit values
...................................................................................................................... 18
Section 5.2: How to get all enum values
................................................................................................................... 19
Section 5.3: Extending enums without custom enum implementation
.................................................................. 19
Section 5.4: Custom enum implementation: extends for enums
............................................................................ 19
Chapter 6: Functions
................................................................................................................................................. 21
Section 6.1: Optional and Default Parameters
......................................................................................................... 21
Section 6.2: Function as a parameter
....................................................................................................................... 21
Section 6.3: Functions with Union Types
................................................................................................................... 23
Section 6.4: Types of Functions
................................................................................................................................. 23
Chapter 7: Classes
...................................................................................................................................................... 24
Section 7.1: Abstract Classes
...................................................................................................................................... 24
Section 7.2: Simple class
............................................................................................................................................. 24
Section 7.3: Basic Inheritance
..................................................................................................................................... 25
Section 7.4: Constructors
............................................................................................................................................ 25
Section 7.5: Accessors
................................................................................................................................................. 26
Section 7.6: Transpilation
........................................................................................................................................... 27
Section 7.7: Monkey patch a function into an existing class
.................................................................................. 28
Chapter 8: Class Decorator
................................................................................................................................... 29
Section 8.1: Generating metadata using a class decorator
.................................................................................... 29
Section 8.2: Passing arguments to a class decorator
............................................................................................. 29
Section 8.3: Basic class decorator
............................................................................................................................. 30
Chapter 9: Interfaces
................................................................................................................................................ 32
Section 9.1: Extending Interface
................................................................................................................................. 32
Section 9.2: Class Interface
........................................................................................................................................ 32
Section 9.3: Using Interfaces for Polymorphism
...................................................................................................... 33
Section 9.4: Generic Interfaces
.................................................................................................................................. 34
Section 9.5: Add functions or properties to an existing interface
.......................................................................... 35
Section 9.6: Implicit Implementation And Object Shape
......................................................................................... 35
Section 9.7: Using Interfaces to Enforce Types
....................................................................................................... 36
Chapter 10: Generics
................................................................................................................................................. 37
Section 10.1: Generic Interfaces
.................................................................................................................................. 37
Section 10.2: Generic Class
......................................................................................................................................... 37
Section 10.3: Type parameters as constraints
......................................................................................................... 38
Section 10.4: Generics Constraints
............................................................................................................................. 38
Section 10.5: Generic Functions
.................................................................................................................................. 39
Section 10.6: Using generic Classes and Functions:
................................................................................................. 39
Chapter 11: Strict null checks
................................................................................................................................ 40
Section 11.1: Strict null checks in action
...................................................................................................................... 40
Section 11.2: Non-null assertions
................................................................................................................................ 40
Chapter 12: User-defined Type Guards
........................................................................................................... 42
Section 12.1: Type guarding functions
....................................................................................................................... 42
Section 12.2: Using instanceof
.................................................................................................................................... 43
Section 12.3: Using typeof
........................................................................................................................................... 43
Chapter 13: TypeScript basic examples
.......................................................................................................... 45
Section 13.1: 1 basic class inheritance example using extends and super keyword
............................................. 45
Section 13.2: 2 static class variable example - count how many time method is being invoked
....................... 45
Chapter 14: Importing external libraries
........................................................................................................ 46
Section 14.1: Finding definition files
............................................................................................................................ 46
Section 14.2: Importing a module from npm
............................................................................................................ 47
Section 14.3: Using global external libraries without typings
.................................................................................. 47
Section 14.4: Finding definition files with TypeScript 2.x
.......................................................................................... 47
Chapter 15: Modules - exporting and importing
......................................................................................... 49
Section 15.1: Hello world module
................................................................................................................................ 49
Section 15.2: Re-export
............................................................................................................................................... 49
Section 15.3: Exporting/Importing declarations
....................................................................................................... 51
Chapter 16: Publish TypeScript definition files
............................................................................................ 52
Section 16.1: Include definition file with library on npm
........................................................................................... 52
Chapter 17: Using TypeScript with webpack
................................................................................................ 53
Section 17.1: webpack.config.js
................................................................................................................................... 53
Chapter 18: Mixins
....................................................................................................................................................... 54
Section 18.1: Example of Mixins
.................................................................................................................................. 54
Chapter 19: How to use a JavaScript library without a type definition file
................................. 55
Section 19.1: Make a module that exports a default any
......................................................................................... 55
Section 19.2: Declare an any global
.......................................................................................................................... 55
Section 19.3: Use an ambient module
....................................................................................................................... 56
Chapter 20: TypeScript installing typescript and running the typescript compiler tsc
........ 57
Section 20.1: Steps
....................................................................................................................................................... 57
Chapter 21: Configure typescript project to compile all files in typescript.
................................ 59
Section 21.1: TypeScript Configuration file setup
..................................................................................................... 59
Chapter 22: Integrating with Build Tools
........................................................................................................ 61
Section 22.1: Browserify
.............................................................................................................................................. 61
Section 22.2: Webpack
............................................................................................................................................... 61
Section 22.3: Grunt
...................................................................................................................................................... 62
Section 22.4: Gulp
........................................................................................................................................................ 62
Section 22.5: MSBuild
.................................................................................................................................................. 63
Section 22.6: NuGet
..................................................................................................................................................... 63
Section 22.7: Install and configure webpack + loaders
........................................................................................... 64
Chapter 23: Using TypeScript with RequireJS
............................................................................................. 65
Section 23.1: HTML example using RequireJS CDN to include an already compiled TypeScript file
................. 65
Section 23.2: tsconfig.json example to compile to view folder using RequireJS import style
............................ 65
Chapter 24: TypeScript with AngularJS
......................................................................................................... 66
Section 24.1: Directive
................................................................................................................................................. 66
Section 24.2: Simple example
.................................................................................................................................... 67
Section 24.3: Component
............................................................................................................................................ 67
Chapter 25: TypeScript with SystemJS
........................................................................................................... 69
Section 25.1: Hello World in the browser with SystemJS
......................................................................................... 69
Chapter 26: Using TypeScript with React (JS & native)
......................................................................... 72
Section 26.1: ReactJS component written in TypeScript
......................................................................................... 72
Section 26.2: TypeScript & react & webpack
........................................................................................................... 73
Chapter 27: TSLint - assuring code quality and consistency
............................................................... 75
Section 27.1: Configuration for fewer programming errors
.................................................................................... 75
Section 27.2: Installation and setup
........................................................................................................................... 75
Section 27.3: Sets of TSLint Rules
.............................................................................................................................. 76
Section 27.4: Basic tslint.json setup
........................................................................................................................... 76
Section 27.5: Using a predefined ruleset as default
................................................................................................ 76
Chapter 28: tsconfig.json
........................................................................................................................................ 78
Section 28.1: Create TypeScript project with tsconfig.json
..................................................................................... 78
Section 28.2: Configuration for fewer programming errors
................................................................................... 79
Section 28.3: compileOnSave
..................................................................................................................................... 80
Section 28.4: Comments
............................................................................................................................................. 80
Section 28.5: preserveConstEnums
........................................................................................................................... 81
Chapter 29: Debugging
............................................................................................................................................ 82
Section 29.1: TypeScript with ts-node in WebStorm
................................................................................................ 82
Section 29.2: TypeScript with ts-node in Visual Studio Code
................................................................................. 83
Section 29.3: JavaScript with SourceMaps in Visual Studio Code
.......................................................................... 84
Section 29.4: JavaScript with SourceMaps in WebStorm
....................................................................................... 84
Chapter 30: Unit Testing
......................................................................................................................................... 86
Section 30.1: tape
......................................................................................................................................................... 86
Section 30.2: jest (ts-jest)
........................................................................................................................................... 87
Section 30.3: Alsatian
.................................................................................................................................................. 89
Section 30.4: chai-immutable plugin
......................................................................................................................... 89
Credits
.............................................................................................................................................................................. 91
You may also like
........................................................................................................................................................ 93
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