Introduction to TypeScript Training in Belgium

Delegates must be proficient JavaScript developers. However, the delivery time can be extended if have no prior knowledge of JavaScript.

• Understand the importance of TypeScript and where it fits in the web ecosystem
• Build a firm understanding of all core TypeScript features
• Be comfortable applying both Object Oriented and Functional paradigms
• Become comfortable with Algebraic Data Types and other advanced concepts

Introduction and Setup

• Why do we need TypeScript?
• What is Transpilation
• The difference between the TypeScript compiler and Babel
• Setting up a build environment with Webpack
• Support for TS in the IDE
• Configuring TypeScript via tsconfig.json
• Decoding the transpiled output

TypeScript Fundamental

• The basic types supported by TS
• The power of type inference
• Comparing any and unknown
• The difference between Casting and Type Assertions
• TypeScript as a superset of Modern JavaScript
• Enhancements to function declarations
• Using function types and higher order functions
• How function overloading works in TypeScript
• Numeric, String and const enumerations

Object Oriented TypeScript

• The TypeScript class model in depth
• Access modifiers and support for JavaScript private
• Enforcing contracts via interfaces
• Readonly properties and Accessors
• Support for generic types and constraints

Advanced TypeScript

• Advanced features of TS interfaces
• The difference between object literals and type literals
• Using string and number literals as Types
• Type Aliases, Unions and Intersections
• Smart Casting and Type Guards
• Defining mapped types and the infer keyword
• Utility types and type programming
• ts-toolbelt and utility-types
• Using class Decorators
• Understanding Symbols
• Generator functions
• Writing asynchronous TypeScript

Testing TypeScript

• Mock objects in a strongly typed world
• Leveraging the Builder pattern
• Testing asynchronous TypeScript