Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

End to-end apps with type script

201 views

Published on

TypeScript session delivered in JavaScript Israel

Published in: Technology
  • Be the first to comment

End to-end apps with type script

  1. 1. End-to-end Apps with TypeScript Gil Fink CEO and Senior Consultant, sparXys
  2. 2. About Me • sparXys CEO and Senior consultant • Microsoft MVP in the last 8 years • Pro Single Page Application Development (Apress) co- author • 4 Microsoft Official Courses (MOCs) co-author • GDG Rishon and AngularUP co-organizer
  3. 3. Agenda • The why • TypeScript syntax and language features • Building a simple end-to-end app with TypeScript • Summary
  4. 4. "JavaScript is the assembly language of the Web" Erik Meijer
  5. 5. “You can write large programs in JavaScript. You just can’t maintain them” Anders Hejlsberg
  6. 6. Let’s Be Serious • JavaScript is really a powerful language: o Functional o Dynamic o Can run everywhere • Huge community • Big eco-system • Tools – IDEs, debuggers, test tools and etc.
  7. 7. What is TypeScript? “TypeScript is a typed superset of JavaScript that compiles to plain JavaScript” ~typescriptlang.org
  8. 8. Hello TypeScript Demo
  9. 9. Some TypeScript Key Features Support standard JavaScript code with static typing Encapsulation through classes and modules Support for constructors, properties and functions Interfaces and enums support Lambda and generics support Intellisense and syntax checking
  10. 10. • Modules • Classes • Arrow functions • Default parameters • Destructuring • Spread and rest • Let and const • for...of • Object literal methods • Shorthand properties • Computed properties • Octal / binary literals • Symbols • Template strings Features from the near Future of the Web (ES2015/6), Today Choose your compilation scenario. It is up to you!
  11. 11. From TypeScript to JavaScript class Greeter { greeting: string; constructor(message: string) { this.greeting = message; } greet() { return “Hi," + this.greeting; } } TypeScript Code JavaScript Code TypeScript Compiler var Greeter = (function () { function Greeter(message) { this.greeting = message; } Greeter.prototype.greet = function () { return “Hi," + this.greeting; }; return Greeter; })(); tsc.js
  12. 12. tsconfig.json • Enables to configure the compiler options: o Target language (ES3, ES5, ES6) o Module system (AMD, ES6, CommonJS and etc.) o Source map generation o Remove comments when compiling o And more
  13. 13. tsconfig.json Demo
  14. 14. Some Important Side Notes • All JavaScript code is TypeScript code o Simply copy and paste • All JavaScript libraries work with TypeScript o You will need a declaration file to work with the library
  15. 15. TypeScript Type Annotations • You can add type annotations to variables and functions • If not added, types are inferred by their context var str: string = ‘hello’; // str is annotated as string function foo(name: string) : string { // parameter and function annotated return ‘hello’ + name; }
  16. 16. Classes and Interfaces • You can define classes (same as in ES2015) • You can define interfaces o And implement them later interface IGreeter { greet(): void; } class Greeter implements IGreeter { greeting: string; greet() { console.log(this.greeting); } } var Greeter = (function () { function Greeter() { } Greeter.prototype.greet = function () { console.log(this.greeting); }; return Greeter; })();
  17. 17. Modules • Uses ES2015 modules syntax export interface IGreeter { greet(): void; } export class Greeter implements IGreeter { greeting: string; greet() { console.log(this.greeting); } } var Greeter = (function () { function Greeter() { } Greeter.prototype.greet = function () { console.log(this.greeting); }; return Greeter; }()); exports.Greeter = Greeter;
  18. 18. Types, Classes, Modules and Interfaces Demo
  19. 19. Building a Simple End-to-End App with TypeScript Demo
  20. 20. TypeScript Versions • TypeScript 1.0 • TypeScript 2.0 • Current version: TypeScript 2.2 (since last week )
  21. 21. Summary • Open source language that compiles into JavaScript • Key features: • Code encapsulation • Maintainable code • Tooling support • Learn TypeScript today!
  22. 22. Resources • TypeScript – http://www.typescriptlang.org • TypeScript Source Code - https://github.com/Microsoft/TypeScript • My Website – http://www.gilfink.net • Follow me on Twitter – @gilfink
  23. 23. Thank You!

×