yield in ERB without rails

Question

How can I use yield for template inheritance in erb? I want to use erb in a plain ruby CGI script and want to use a base template and subtemplate like it Rails wit

Answer 1

app.rb

require 'erb'

class Template
    def render(template_name="base")
        ERB.new(File.read("#{template_name}.erb")).result(binding)
    end
end

result = Template.new.render do
    ERB.new(File.read("index.erb")).result
end

puts result

base.erb

    <%= render "footer" %>
    <%=yield %>

index.erb

Index Page

footer.erb

Footer here

output image: