javascript_tag(content_or_options_with_block = nil, html_options = {}, &block) public

Returns a JavaScript tag with the content inside. Example: 

  javascript_tag "alert('All is good')"

Returns: 

  <script type="text/javascript">
  //<![CDATA[
  alert('All is good')
  //]]>
  </script>

html_options may be a hash of attributes for the <script> tag. Example: 

  javascript_tag "alert('All is good')", :defer => 'defer'
  # => <script defer="defer" type="text/javascript">alert('All is good')</script>

Instead of passing the content as an argument, you can also use a block in which case, you pass your html_options as the first parameter. 

  <%= javascript_tag :defer => 'defer' do -%>
    alert('All is good')
  <% end -%>
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