Ruby on Rails/Examples/HTML4.01
Rails generates XHTML by default. It can be made to generate HTML4.01 that can be validated with The W3C HTML validator.
DOCTYPE
[edit | edit source]Layouts begin with the HTML4.01 Strict DOCTYPE:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">ApplicationHelper
[edit | edit source]application_helper.rb looks something like this:
moduleHtml4ize# Supports making alternative versions of Rails helpers that output HTML# 4.01 markup as opposed to XHTML. Example:## html4_version_of :submit_tag## ..which creates a submit_tag_html4 helper that takes the same options as# submit_tag but which renders HTML 4.01.#defhtml4_version_ofhelper_namedefine_method"#{helper_name}_html4"do|*args|html=sendhelper_name,*argshtml.gsub!" />",">"htmlendenddefhtml4_versions_of*helper_nameshelper_names.eachdo|helper_name|html4_version_ofhelper_nameendendclass<<selfdefincludedreceiverreceiver.extendHtml4izeendendend# Methods added to this helper will be available to all templates in the application.moduleApplicationHelperincludeHtml4izehtml4_versions_of:stylesheet_link_tag,:image_tag,:text_field,:submit_tag...end# Extend FormBuilder with our own helper methodsclassActionView::Helpers::FormBuilderincludeHtml4izehtml4_versions_of:text_field,:check_box,:hidden_field,:submit...endViews
[edit | edit source]Views can then refer to the newly-wrapped helpers:
...<%= image_tag_html4 "logo.png" %> ... <% form_for :person do |form| %> <div><b>Name:</b><%=form.text_field_html4:name%></div>...<divclass="submit"><%=form.submit_html4"Save"%></div><% end %>