Wraps a block of content in an html tag, only if it has content present (See related posts)

Fed up of empty wrapper html tags when content isn't there? Then use this Rails helper...

  def tag_unless_empty(html_tag, options = {}, &block)
    html_options = options.stringify_keys

    if block_given?
      content = capture(&block)
      unless content.strip.empty?
        concat(tag(html_tag, html_options, true), block.binding)
        concat(content, block.binding)
        concat("#{html_tag}>", block.binding)
      end
    end
  end

Example:

<% tag_unless_empty :div, :class => "css_class" do %>
   <%# Nothing actually rendered here %>
   <%# or here %>
<% end %>

produces nothing, whereas

<% tag_unless_empty :div, :class => "css_class" do %>
   <%= 'Something rendered here' %>
<% end %>

produces

<div class="css_class">Something rendered herediv>