Builder

Blueprint::HTML module provides the .build method for those cases when you don't need or don't want to create a class or struct to write HTML.

html = Blueprint::HTML.build do
  h1 { "Hello" }
  div do
    span { "World" }
  end
end

puts html

Output:

<h1>Hello</h1>

<div>
  <span>World</span>
</div>