Method: ActionView::Helpers::JavaScriptHelper#javascript_tag

Defined in:
lib/action_view/helpers/javascript_helper.rb

#javascript_tag(content_or_options_with_block = nil, html_options = {}, &block) ⇒ Object

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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# File 'lib/action_view/helpers/javascript_helper.rb', line 168

def javascript_tag(content_or_options_with_block = nil, html_options = {}, &block)
  content =
    if block_given?
      html_options = content_or_options_with_block if content_or_options_with_block.is_a?(Hash)
      capture(&block)
    else
      content_or_options_with_block
    end

  tag = content_tag(:script, javascript_cdata_section(content), html_options.merge(:type => Mime::JS))

  if block_called_from_erb?(block)
    concat(tag)
  else
    tag
  end
end