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TypeScript: JavaScript for on Steroids

TypeScript: JavaScript for on Steroids

This session gives a brief introduction to TypeScript. The source code can be found at https://github.com/toedter/typescript-contacts-demo. TypeScript was created by Microsoft (Anders Hejlsberg) and is licensed under Apache 2.0. The main Web resource is typescriptlang.org. Here you find all information and you can play around live with a nice editor (seeing the original TypeScript and the compiled JavaScript). Currently the TypeScript compiler runs either as a node.js module or using Windows Scripting host. This slide deck is licensed under a Creative Commons Attribution 4.0 International License.

Kai Toedter

June 19, 2015
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  1. TypeScript
    JavaScript on Steroids
    Kai Tödter
    6/23/2015 1
    © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License.

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  2. Who am I?
     Senior Software System Architect
    at Siemens Building Technologies
     Web Technology Fan
     Open Source Lover
     E-mail: [email protected]
     Twitter: twitter.com/kaitoedter
     Google+: gplus.to/toedter
     Blog: toedter.com/blog
    6/23/2015 2
    © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License.

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  3. Show Hands!
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 3

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  4. TypeScript?
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 4

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  5. After this
    session I’ll have
    an idea what
    TypeScript is all
    about!
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 5

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  6. Outline
     Why JavaScript scares many Java/OO
    developers
     TypeScript Introduction
     Demos & Live Coding
    6/23/2015 6
    © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License.

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  7. JavaScript?
    Many Java/OO developers don’t like JavaScript regarding
    writing larger applications. Some reasons are:
     No static typing
     No reliable code completion (only best guess)
     Hard to refactor
     Not object-oriented, especially
     No structuring mechanisms like Interfaces, Classes,
    Modules
     …
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 7

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  8. Who fixes that?
     Dart
     Great language by Google: dartlang.org
     Team has to learn new language
     Either runs on Dart VM or compiles to JavaScript
     CoffeeScript
     Ruby-like, concise syntax
     Compiles to JavaScript
     coffescript.org
     BabelJS
     JavaScript compiler
     babeljs.io
     Traceur
     JavaScript compiler
     github.com/google/traceur-compiler
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 8

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  9. TypeScript: Summary
     Typed Superset of JavaScript
     Almost all valid JavaScript is valid TypeScript*
     Compiles to JavaScript
     Provides optional static type checking at compile time
     For most existing JavaScript libraries there are type
    definitions available
     Provides Interfaces, Classes, Modules, Enums, Generics and
    more
     Open Source: Apache 2.0 License
     Created by Microsoft
    * Exceptions mostly related to type inference
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 9

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  10. How to get started?
     www.typescriptlang.org
     Install node.js (nodejs.org)
     Invoke “npm install –g typescript”
     Compile a TypeScript file:
    “tsc myTypeScript.ts”
     Results in “myTypeScript.js”
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 10

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  11. www.typescriptlang.org
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 11

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  12. Play!
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 12

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  13. Definitely Typed
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 13

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  14. WebStorm/IntelliJ IDEA
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 14

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  15. Eclipse
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 15

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  16. Visual Studio
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 16

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  17. Live Demo
    https://github.com/toedter/typescript-contacts-demo
    https://github.com/toedter/chatty
    https://github.com/toedter/webapp-tutorial
    https://github.com/toedter/angular2-typescript-demo
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 17

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  18. 6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 18
    Discussion

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  19. License
     This work is licensed under a Creative Commons
    Attribution 4.0 International License.
     See http://creativecommons.org/licenses/by/4.0/
    6/23/2015 © Kai Tödter, Licensed under a Creative Commons Attribution 4.0 International License. 19

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