Enhance your Javascript with Typescript - Félix Billon

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aOS Aachen
December 1st 2017
Enhance your Javascript with Typescript
@felix_billon

aOS Aachen
December 1st 2017
Félix Billon
Web developper Co-lead Organisateur
@felix_billon
felixbillon
http://shakedatcode.com
Member

aOS Aachen
December 1st 2017
Raise of TypeScript

aOS Aachen
December 1st 2017
Raise of TypeScript in 2017
• Top 20, RedMonk Q117 Programming Language Rankings
• Third most loved Programming Language in Stack Overflow 2017 Developer Survey
• TypeScript at Slack
• Why we chose Typescript (reddit)
• Typescript is now an official language used at Google
• …

aOS Aachen
December 1st 2017
TypeScript ?
• Typed superset of Javascript.
• Made in Microsoft.
• Open source on github.
• Main features : transpilation and
static typings.

aOS Aachen
December 1st 2017
Transpilation
@felix_billon

aOS Aachen
December 1st 2017
ECMAScript
• ECMAScript is a standard for a scripting languages.
• Well-known implementations of the ECMAScript standard :
javascript, actionscript, …
Browser
JS EngineEcmaScript
implements
Edge : Chakra
Chrome : V8
Firefox : SpiderMonkey
…

aOS Aachen
December 1st 2017
ECMAScript : version history
ES5
ES6
ES2ES1 ES3
ES4
ES7 ES8
1997 1998 1999
2008
2009
2015
2016 2017
ES9
2018

aOS Aachen
December 1st 2017
Technical Committee 39

aOS Aachen
December 1st 2017
Implementation rate of ES6 -> Browser

aOS Aachen
December 1st 2017
Implementation rate of ES6 -> NodeJS

aOS Aachen
December 1st 2017
Transpilation : exemple

aOS Aachen
December 1st 2017
Static typings
@felix_billon

aOS Aachen
December 1st 2017
What's the purpose
• Spottings common error.
• Improve readbility of code.
• Enhance IDE features : code navigation, autocompletion, refactoring,
…

aOS Aachen
December 1st 2017
Basic
• Basic Types : boolean, number, string, array, object, void …
• Example :
• Type inference.
• Be careful : any.
• Typings are used only during compilation.
function foo(bar: string): void { ... }
let list: number[] = [1,2,3];

aOS Aachen
December 1st 2017
TypeScript Definition File
• File wich have .d.ts extention, describe and type javascript code.
• Use external NPM’s package in my TypeScript Project :
1. Write in TS -> nothing to do
2. Write in JS but it shipped with its .d.ts -> nothing to do
3. Write in JS without its .d.ts -> fetch it on NPM @types (to search TypeSearch)

aOS Aachen
December 1st 2017
Framework compatible

aOS Aachen
December 1st 2017
Architecture and integration
@felix_billon

aOS Aachen
December 1st 2017
Architecture

aOS Aachen
December 1st 2017
Integration in IDE

aOS Aachen
December 1st 2017
Integration in JS Tooling

aOS Aachen
December 1st 2017
Conclusion
• Brings more robustness and scalability on your codebase.
• Smooth learning curve and well integrated in front-end environment.
• Big active community.

aOS Aachen
December 1st 2017
Usefull link
ESNext :
• Free Ebook :
http://exploringjs.com/es6.html et
http://exploringjs.com/es2016-
es2017/index.html
• Free Ebook :
https://leanpub.com/understandin
ges6/read
Typescript :
• Official website :
www.typescriptlang.org
• Free Ebook :
https://github.com/basarat/type
script-book

aOS Aachen
December 1st 2017
Thanks to our sponsors!
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Enhance your Javascript with Typescript - Félix Billon

1. aOS Aachen December 1st 2017 Enhance your Javascript with Typescript @felix_billon

2. aOS Aachen December 1st 2017 Félix Billon Web developper Co-lead Organisateur @felix_billon felixbillon http://shakedatcode.com Member

3. aOS Aachen December 1st 2017 Raise of TypeScript

4. aOS Aachen December 1st 2017 Raise of TypeScript in 2017 • Top 20, RedMonk Q117 Programming Language Rankings • Third most loved Programming Language in Stack Overflow 2017 Developer Survey • TypeScript at Slack • Why we chose Typescript (reddit) • Typescript is now an official language used at Google • …

5. aOS Aachen December 1st 2017 TypeScript ? • Typed superset of Javascript. • Made in Microsoft. • Open source on github. • Main features : transpilation and static typings.

6. aOS Aachen December 1st 2017 Transpilation @felix_billon

7. aOS Aachen December 1st 2017 ECMAScript • ECMAScript is a standard for a scripting languages. • Well-known implementations of the ECMAScript standard : javascript, actionscript, … Browser JS EngineEcmaScript implements Edge : Chakra Chrome : V8 Firefox : SpiderMonkey …

8. aOS Aachen December 1st 2017 ECMAScript : version history ES5 ES6 ES2ES1 ES3 ES4 ES7 ES8 1997 1998 1999 2008 2009 2015 2016 2017 ES9 2018

9. aOS Aachen December 1st 2017 Technical Committee 39

10. aOS Aachen December 1st 2017 Implementation rate of ES6 -> Browser

11. aOS Aachen December 1st 2017 Implementation rate of ES6 -> NodeJS

12. aOS Aachen December 1st 2017 Transpilation : exemple

13. aOS Aachen December 1st 2017 Static typings @felix_billon

14. aOS Aachen December 1st 2017 What's the purpose • Spottings common error. • Improve readbility of code. • Enhance IDE features : code navigation, autocompletion, refactoring, …

15. aOS Aachen December 1st 2017 Basic • Basic Types : boolean, number, string, array, object, void … • Example : • Type inference. • Be careful : any. • Typings are used only during compilation. function foo(bar: string): void { ... } let list: number[] = [1,2,3];

16. aOS Aachen December 1st 2017 TypeScript Definition File • File wich have .d.ts extention, describe and type javascript code. • Use external NPM’s package in my TypeScript Project : 1. Write in TS -> nothing to do 2. Write in JS but it shipped with its .d.ts -> nothing to do 3. Write in JS without its .d.ts -> fetch it on NPM @types (to search TypeSearch)

17. aOS Aachen December 1st 2017 Framework compatible

18. aOS Aachen December 1st 2017 Architecture and integration @felix_billon

19. aOS Aachen December 1st 2017 Architecture

20. aOS Aachen December 1st 2017 Integration in IDE

21. aOS Aachen December 1st 2017 Integration in JS Tooling

22. aOS Aachen December 1st 2017 Conclusion • Brings more robustness and scalability on your codebase. • Smooth learning curve and well integrated in front-end environment. • Big active community.

23. aOS Aachen December 1st 2017 Usefull link ESNext : • Free Ebook : http://exploringjs.com/es6.html et http://exploringjs.com/es2016- es2017/index.html • Free Ebook : https://leanpub.com/understandin ges6/read Typescript : • Official website : www.typescriptlang.org • Free Ebook : https://github.com/basarat/type script-book

24. aOS Aachen December 1st 2017 Thanks to our sponsors! Platinum Diamond

Editor's Notes

report surge in popularity RedMonk popularity stackoverflow (Tags) et github (pull request), 17ème alors que 31 en 2016 janvier TypeScript 9th most popular and Slack : communication tools Reddit : American social news aggregation, web content rating, and discussion website TypeScript chez google officiel depuis mars 2017 : utilisé pour google analytics, Firebase et Google cloud plateform and internal tools such as bug tracking, remployee reviews, …
Plage lagon Boucan Canot
ECMA = W3C (css, html and web api) Js is interpret language = new version of ES is out -> update browser and JS engine embed in it
Version history : 2.0 succinte (MAJ syntaxe), 3.0 quelques ajouts (try/catch, regex,…), 4.0 aborted, 5.0 (getter,setter, …), 6.0 juin 2015 et 7.0 juin 2016 2008 small Javascript community, language wasn’t so popular… 2015 huge active community, high expectation. ES6 : arrow function, class, Map et Set, desctructuration, promise ES7 : operateur exponentiel et propriété tableau include ES8 : async/await, padding string ES9 : champs privé, déclaration des champs
Ecma-262 = ecmascript Spec environ 600 page Disponible en ligne Tc39 groupe
Drop support of IE 11 et version antérieur de chrome et firefox …
From 6.4.0
- Compiling is the general term for taking source code written in one language and transforming into another - Transpiling is a specific term for taking source code written in one language and transforming into another language that has a similar level of abstraction DEMO 1 : tsconfig, transpilation -> target et module
Add type annotation. Onboard a new developper.
NPM package manager like nuget for C#, composer PHP or gem for ruby.
Core compiler, a partir d’un contexte (config + fichier) : AST -> token -> … emiter (transpilation) et checker (static type check) Standalone TS compiler (cli) Language service (fournit des services comme l’autocompletion, find all reference, …). Depuis la 2.3 possibilité de brancher des plugins pour avoir ces features autres par que dans typescript (template angular2, vueJs, graphQL …) Tsserver : executable node, wrap services et core compiler et les expose à travers un protocl JSON

Enhance your Javascript with Typescript - Félix Billon

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Enhance your Javascript with Typescript - Félix Billon

Editor's Notes