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 -%>

Source Code

# File action_view/helpers/javascript_helper.rb, line 174
def javascript_tag(content_or_options_with_block = nil, html_options = {}, &block)
  if block_given?
    html_options = content_or_options_with_block if content_or_options_with_block.is_a?(Hash)
    content = capture(&block)
  else
    content = content_or_options_with_block
  end

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

  if block_given? && block_is_within_action_view?(block)
    concat(javascript_tag, block.binding)
  else
    javascript_tag
  end
end