End to-end apps with type script

End to-end apps with type script

• 1.
  End-to-end Apps withTypeScript Gil Fink CEO and Senior Consultant, sparXys
• 2.
  About Me • sparXysCEO 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.
  Agenda • The why •TypeScript syntax and language features • Building a simple end-to-end app with TypeScript • Summary
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  "JavaScript is theassembly language of the Web" Erik Meijer
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  “You can writelarge programs in JavaScript. You just can’t maintain them” Anders Hejlsberg
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  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.
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  What is TypeScript? “TypeScriptis a typed superset of JavaScript that compiles to plain JavaScript” ~typescriptlang.org
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  Hello TypeScript Demo
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  Some TypeScript Key Features Support standard JavaScript codewith 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
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  • 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!
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  From TypeScript to JavaScript classGreeter { 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
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  tsconfig.json • Enables toconfigure 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
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  tsconfig.json Demo
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  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
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  TypeScript Type Annotations • Youcan 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; }
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  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; })();
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  Modules • Uses ES2015modules 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;
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  Types, Classes, Modulesand Interfaces Demo
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  Building a SimpleEnd-to-End App with TypeScript Demo
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  TypeScript Versions • TypeScript1.0 • TypeScript 2.0 • Current version: TypeScript 2.2 (since last week )
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  Summary • Open sourcelanguage that compiles into JavaScript • Key features: • Code encapsulation • Maintainable code • Tooling support • Learn TypeScript today!
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  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
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  Thank You!