railties/lib/rails/templates/rails/mailers/mailer.html.erb

Summary

Maintainability
Test Coverage
<h1><%= @page_title %></h1>

<% if @preview.emails.any? %>
  <ul>
  <% @preview.emails.each do |email| %>
  <li><%= link_to email, url_for(controller: "rails/mailers", action: "preview", path: "#{@preview.preview_name}/#{email}") %></li>
  <% end %>
  </ul>
<% else %>
  <p>You have not defined any actions for <%= @preview %>.</p>
  <p>Read <%= link_to "Action Mailer Basics", "https://guides.rubyonrails.org/action_mailer_basics.html#previewing-emails" %> to learn how to define your first.</p>
<% end %>