TypeScript 101
- 1. TypeScript 101 Ross Terman www.xeq.com rterman@xeq.comt ed by Ross Terman
- 2. What is TypeScript TypeScript is a superset of JavaScript You can enter pure JavaScript into TypeScript TypeScript gives you type safety. TypeScript gives you encapsulation. TypeScript allows you to organize your code into Modules and Classes
- 4. TypeScript Features • Standard JavaScript Code • Static Typing • Encapsulation with Modules and Classes • Classes support Constructors, Properties, Fields and Functions • Interfaces • Lambda Functions => • Intellisense and syntax checking
- 5. Additional Keywords and Operators exports and imports constructor extends implements Interface public/private … Rest syntax => Arrow or lambda functions <typename> type conversion : assignment
- 6. Code Hierarchy Module Interface Class Fields Constructors Properties Functions
- 7. Types Type Inference Annotations Type Definition Files Primitive Types: Number, String, Boolean, Any, Null, Undefined Object Types
- 8. Functions Parameters – Required and Optional Arrow (lambda) functions Void for functions that return no value
- 9. Classes Class Members – Fields, Properties, Functions, Constructors Add functions to a class. Note lack of function keyword Define properties Complex Types (object types) – Instantiate with New keyword Types can be cast https://github.com/borisyankov/DefinetlyTyped Extending Types – super() function. Similar to base Immediately-invoked function expression – iffy
- 10. Interfaces Optional members Implementing Using an Interface as a type Extend interface
- 11. Modules Benefits – Separation of concern, maintainable, testable, reusable Open – Can be exposed for both Import and Export Asynchronous Module Definition - AMD
- 13. Contact Us Ross Terman – 305-726-6925 rterman@xeq.com @xeqinfo