Universal Groovy allows applications written in Groovy to run on both client-side and server-side by converting Groovy code to JavaScript. It shares the same codebase between the frontend and backend. Grooscript is a library that compiles Groovy to equivalent JavaScript code, allowing Groovy developers to write code once and run it on both server and client without learning a new language. Developers benefit from being able to use the same Java tools, environment and testing frameworks like Spock for both frontend and backend code.

1. Universal Groovy
JCConf 2016
吳欣展 pcbill

4. Isomorphic / Universal
Applications which run both client-side and server-side.
The backend and frontend share the same code.

5. Library (JAR)
Groovy 2.3+(for traits) to javascript ECMA 5
Apache 2 License
Converted code needs grooscript.js
Tools: gradle, grails, npm/bower
Grooscript

6. WHY?
You have all the Java tools and IDE’s
Don’t repeat code in 2 languages
Single development environment
Don’t learn another “to Javascript” tool
Static typed if you want to
Using Spock to test your codes

7. FUN !!!

8. LINKS
Website: http://grooscript.org
Documentation: http://grooscript.org/doc.html
Github: https://github.com/chiquitinxx/grooscript
Demos: https://github.com/chiquitinxx/grooscript-demos
Twitter @grooscript
Try live!: http://grooscript.org/conversions.html

9. Groovy
UI
component
def <-> var
Expando <->
Javascript object
[ ] <-> [ ]
{ } <-> function() { }
HTML
Builder
Javascript

10. form(id: 'addTodos') {
h3 'TODO'
ul {
todos.each {
li it
}
li {
input(type: 'text', id: 'actualTodo', value: actualTodo)
button {
yield "Add #${todos.size() + 1}"
}
}
}
}

12. Reactjs?
http://grooscript.org/react_example.html
Angularjs?
https://devsoap.com/writing-angularjs-applications-in-groovy/

13. Q & A