RubyConfBR 2016: There is a Ruby in your Browser

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@brodock blog.gabrielmazetto.eti.br Gabriel Mazetto

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There is a Ruby in your Browser

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CREATE, COLLABORATE AND DEPLOY FROM IDEA TO PRODUCTION

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We are going to talk a lot about languages today...

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But first... Let's go back in time...

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1980 - 1988

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Hypertext Real-time RPC Computer Networking CERN, John Poole's ICS

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Tim Berners-Lee

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March, 1989

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Hypertext + TCP + DNS

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World Wide Web

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Dec, 1990

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WorldWideWeb First 'navigator'

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1991-1993

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Spreading the web Outside europe

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1993

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NCSA Mosaic 0.5

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CERN Releases WorldWideWeb source code

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1994

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Netscape Navigator 1.0

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1995

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Web needs to become More dynamic...

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Netscape hired Brendan Eich

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To implement Scheme* In the browser

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"Why the web needed 2 programming languages?" Java, Scripting Language

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Requirement: Syntax similar to Java

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Perl Python TCL Scheme

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Prototype language in 10 days...

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"We aimed to provide a 'glue language' for the web designers and part-time programmers"

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1996

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Alan Cooper Created VBScript

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Script language for the whole Windows ecosystem*

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As we are talking about languages...

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1995

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Ruby was born...

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"People want to express themselves when they program. They don't want to fight with the language" (2001, Matz)

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"You can do everything in assembler, but no one wants to program in assembler anymore" (2003, Matz)

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We <3 Ruby but...

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"...no one wants to program in assembler anymore" Can avoid Javascript (2016, Elia Schito)

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Why Javascript ? ? ?

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How to organize your code In javascript

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AMD CommonJS RequireJS *Harmony (ES6) Anonymous Closure Module Pattern Browserify jQuery plugin *DIY StealJS SystemJS

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Everything in JS is time-sensitive* (and could be incompatible)

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Frameworks, libraries Everything change from little time to time

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Packaging and delivery

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npm (gate) bower jspm volojs jamjs† spmjs† cpm† componentjs†

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leftpad

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Options are not but Noise and distraction

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Why not stick with Ruby?

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Decaf Browser: Webkit fork that runs Ruby (native) gh: timahoney/decaf

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Not the best alternative As it's hard to convince every browser...

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Why not write Ruby In JS?

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Opal is ~95% RubySpec ready

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Ruby runtime + Transpiler

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Native: Arrays, numbers, strings*, boolean, self -> this

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# this puts "hello rubyconf" # becames: (function(Opal) { var self = Opal.top, $scope = Opal, nil = Opal.nil, $breaker = Opal.breaker, $slice = Opal.slice; Opal.add_stubs(['$puts']); return self.$puts("Hello RubyConfBr") })(Opal);

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Packaging and Dependency

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$ gem install opal-* # With rails, add to your Gemfile and: $ bundle install # In your code: require 'my-awesome-framework'

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Sprockets Rails Integration:

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Some libraries To get started...

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opal-jquery

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# Gemfile gem 'opal' gem 'opal-jquery' # Your code: Document.ready? do alert "document is ready to go!" end # ... Element.find('#header').on :click do puts "The header was clicked!" end

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opal-rspec

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# Gemfile gem 'opal' gem 'opal-rspec' # Your code: describe User do it "can be created with a name" do expect(User.new).to_not be_persisted end end

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Frameworks

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Inesita.rb

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class Clock include Inesita::Component def initialize @time = Time.now end def render div class: 'clock' do text @time.strftime('%r') end end End $document.ready do Clock.new.mount_to($document['clock']) end

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React.rb

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class Nav < React::Component::Base def render div {"Our Nav Bar Goes Here including a login box"} end end

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Perguntas?