ruby-hyperloop.io/tutorials/hyperloopjs/index.html at master · explainer/ruby-hyperloop.io · GitHub

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<!doctype html>
<html>
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    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <meta name="google-site-verification" content="qjqVOvRhHfsuDbLOvaAnj2mkUZJ9Xwzg84TMVXduvUc" />

    <meta charset="UTF-8">
    <title>Hyperloop - Tutorials, Videos & Quickstarts</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <script src="https://unpkg.com/react@15/dist/react.min.js"></script>
    <script src="https://unpkg.com/react-dom@15/dist/react-dom.min.js"></script>

    <script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.5/marked.min.js"></script>


    <!-- Opal and Hyperloop -->
    <script src="https://rawgit.com/ruby-hyperloop/hyperloop-js/master/opal-compiler.min.js"></script>
    <script src="https://rawgit.com/ruby-hyperloop/hyperloop-js/master/hyperloop.min.js"></script>

    <!-- If you want local copies... -->
    <!-- <script src="../../javascripts/opal-compiler.js"></script> -->
    <!-- <script src="../../javascripts/hyperloop.js"></script> -->

    <script src="https://npmcdn.com/tether@1.2.4/dist/js/tether.min.js"></script>

    <script src="../../javascripts/bootstrap.min.js"></script>
    <script src="../../javascripts/codemirror.js"></script>
    <script src="../../javascripts/ruby.js"></script>
    <script src="../../javascripts/matchbrackets.js"></script>
    <script src="../../javascripts/react_player.js"></script>

    <!-- Components are compiled by Hyperloop Express -->
    <script type="text/ruby">

class CodeMirror < Hyperloop::Component
  param :code, type: String
  param :heading, default: "Code"
  param :rows, type: Integer, default: 0
  param :top_level_component, type: String

  before_mount do
    r=rand(2**256).to_s(36)[0..7]
    @div_code = "code_#{r}"
    @div_result = "result_#{r}"
  end

  after_mount do
  # puts params.code
    @editor = `CodeMirror(document.getElementById(#{@div_code}), {
      value: #{params.code.to_s},
      mode: 'text/x-ruby',
      matchBrackets: true,
      lineNumbers: false,
      indentUnit: 2,
      theme: 'github'
    });`

    `#{@editor}.on('change', #{lambda {on_change} })`
    `#{@editor}.setSize(null, #{@editor}.defaultTextHeight()*#{params.rows})` unless params.rows == 0
    execute_code
  end

  render(DIV) do
    div.card {
      div.card_header { params.heading }
      div(id: @div_code)
      div.card_header do
        img(src: '../../images/hyperloop-logo-small-white.png' , width:'25')
        span { ' ' }
        'Live editor results'
      end
      div.card_block(id: @div_result)
    }
  end

  def on_change
    execute_code
  end

  def execute_code
    begin
      code = `#{@editor}.getValue()`
      # puts code
      code += "\nElement['##{@div_result}'].render(#{params.top_level_component})"
      compiled_code = Opal::Compiler.new(code).compile

      `ReactDOM.unmountComponentAtNode(document.getElementById(#{@div_result}));`

      # Dispatchers and Receivers example works but Steps example breaks
      # Hyperloop::Context.reset!
      # `eval(#{compiled_code})`
      # Hyperloop::Application::Boot.run()

      # Steps example works but Dispatchers and Receivers example breaks
      `eval(#{compiled_code})`
      Hyperloop::Context.reset!
      Hyperloop::Application::Boot.run()

      component = Module.const_get params.top_level_component
      # we need to see if the component is valid - try checking if it can render static markup
      # the following line generates: `undefined method to_n for SimpleComponent`
      # if React.render_to_static_markup( component ).empty?
      #   invalid_component_message
      # end
    rescue Exception => e
      @time_out = after(0.1) do
        unable_to_compile_message e.message
      end
    end
  end

  def invalid_component_message
    message = div.text_danger do
      h3.text_danger {"Oops, invalid Component..."}
      p { "Your Component has been rejected by React. A valid Component must have a render macro and return just one HTML element." }
    end
    Element["##{@div_result}"].render{ message }
  end

  def unable_to_compile_message reason
    message = div.text_danger do
      h3.text_danger {"Can't compile..."}
      p { reason }
    end
    Element["##{@div_result}"].render{ message }
  end

end

</script>

    <script type="text/ruby">

Document.ready? do
   Element.find('div.codemirror-live-edit').each do |mount_point|
     heading = mount_point.attr('data-heading')
     rows = mount_point.attr('data-rows')
     top_level_component = mount_point.attr('data-top-level-component')
     code = Element[mount_point].find('pre').text.strip
     params = {code: code, top_level_component: top_level_component}
     params = params.merge({heading: heading}) if heading
     params = params.merge({rows: rows.to_i}) if rows
     codemirror_component = Object.const_get('CodeMirror')
     React.render(React.create_element(codemirror_component, params ), mount_point)
   end
end

</script>


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<p>This simple tutorial will teach you the basic of using a <strong>Components</strong> within a Hyperloop.js environment. </p>

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<p>This tutorial will teach you the basics of building a Hyperloop application that <strong>runs purely in your browser</strong> with no need for any back end system (like Rails, Node or Sinatra).
This work-along tutorial is an excellent place to start to learn the <strong>Hyperloop</strong> DSL without needing to learn how to install it. If you have not used the Hyperloop DSL before, this tutorial will get you going with minimal setup</p>

<p><strong>Skills covered</strong>: <a href="/docs/components/dsl-overview" class="component-blue"><b>C</b>omponents</a>, Opal syntax</p>

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