This extension is part of the Sinatra::Contrib project. Run gem install sinatra-contrib to have it available.

Sinatra::Capture¶ ↑

Extension that enables blocks inside other extensions. It currently works for erb, slim and haml. Enables mixing of different template languages.

Example:

# in hello_world.erb

Say
<% a = capture do %>World<% end %>
Hello <%= a %>!

# in hello_world.slim

| Say
- a = capture do
  | World
|  Hello #{a}!

# in hello_world.haml

Say
- a = capture do
  World
  Hello #{a.strip}!

You can also use nested blocks.

Example

# in hello_world.erb

Say
<% a = capture do %>
  <% b = capture do %>World<% end %>
    <%= b %>!
<% end %>
Hello <%= a.strip %>

The main advantage of capture is mixing of different template engines.

Example

# in mix_me_up.slim

- two = capture do
  - erb "<%= 1 + 1 %>"
| 1 + 1 = #{two}

Usage¶ ↑

Classic Application¶ ↑

In a classic application simply require the helpers, and start using them:

require "sinatra"
require "sinatra/capture"

# The rest of your classic application code goes here...

Modular Application¶ ↑

In a modular application you need to require the helpers, and then tell the application you will use them:

require "sinatra/base"
require "sinatra/capture"

class MyApp < Sinatra::Base
  helpers Sinatra::Capture

  # The rest of your modular application code goes here...
end