module ActionView::Helpers::TagHelper

def build_tag_values(*args)

def build_tag_values(*args)
  tag_values = []
  args.each do |tag_value|
    case tag_value
    when Hash
      tag_value.each do |key, val|
        tag_values << key.to_s if val && key.present?
      end
    when Array
      tag_values.concat build_tag_values(*tag_value)
    else
      tag_values << tag_value.to_s if tag_value.present?
    end
  end
  tag_values
end

def cdata_section(content)

# => world]]>
cdata_section("hello]]>world")

# =>
cdata_section(File.read("hello_world.txt"))

# => ]]>
cdata_section("")

and end with (and may not contain) the string ]]>. otherwise be recognized as markup. CDATA sections begin with the string are used to escape blocks of text containing characters which would Returns a CDATA section with the given +content+. CDATA sections

def cdata_section(content) splitted = content.to_s.gsub(/\]\]>/, "]]]]><![CDATA[>") "<![CDATA[#{splitted}]]>".html_safe end

def content_tag(name, content_or_options_with_block = nil, options = nil, escape = true, &block) # => Hello world! <% end -%> Hello world! <%= content_tag :div, class: "strong" do -%> # => content_tag("select", options, multiple: true) # => Hello world! content_tag(:div, "Hello world!", class: ["strong", { highlight: current_user.admin? }]) # => Hello world! content_tag(:div, "Hello world!", class: ["strong", "highlight"]) # => Hello world! content_tag(:div, content_tag(:p, "Hello world!"), class: "strong") # => Hello world! content_tag(:p, "Hello world!") ==== Examples symbols or strings for the attribute names. readonly), which you can give a value of true in the +options+ hash. You can use The +options+ hash can be used with attributes with no value like (disabled and ==== Options Note: this is legacy syntax, see +tag+ method description for details. Set escape to false to disable escaping. in which case, you pass your +options+ as the second parameter. Instead of passing the content as an argument, you can also use a block HTML attributes by passing an attributes hash to +options+. Returns an HTML block tag of type +name+ surrounding the +content+. Add def content_tag(name, content_or_options_with_block = nil, options = nil, escape = true, &block) if block_given? options = content_or_options_with_block if content_or_options_with_block.is_a?(Hash) tag_builder.content_tag_string(name, capture(&block), options, escape) else tag_builder.content_tag_string(name, content_or_options_with_block, options, escape) end end def escape_once(html) # => "<< Accept & Checkout" escape_once("<< Accept & Checkout") # => "1 < 2 & 3" escape_once("1 < 2 & 3") Returns an escaped version of +html+ without affecting existing escaped entities. def escape_once(html) ERB::Util.html_escape_once(html) end def tag(name = nil, options = nil, open = false, escape = true) # => tag("div", class: { highlight: current_user.admin? }) # => tag("div", data: { name: 'Stephen', city_state: %w(Chicago IL) }) # => tag("img", { src: "open & shut.png" }, false, false) # => tag("img", src: "open & shut.png") # => tag("input", type: 'text', class: ["strong", "highlight"]) # => tag("input", type: 'text', disabled: true) # => tag("br", nil, true) # => tag("br") ==== Examples pointing to a hash of sub-attributes. HTML5 data-* attributes can be set with a single +data+ key +disabled+ and +readonly+. Use +true+ with boolean attributes that can render with no value, like You can use symbols or strings for the attribute names. ==== Options escaping. hash to +options+. Set +escape+ to false to disable attribute value with HTML 4.0 and below. Add HTML attributes by passing an attributes compliant. Set +open+ to true to create an open tag compatible It returns an empty HTML tag of type +name+ which by default is XHTML tag(name, options = nil, open = false, escape = true) The following format is for legacy syntax support. It will be deprecated in future versions of \Rails. === Legacy syntax # => # => > prefixed attributes: aria: or data: objects into aria- and data- Transforms keys nested within ERB. Includes or omits boolean attributes based on their truthiness. Transforms a Hash into HTML attributes, ready to be interpolated into === Building HTML attributes tag.br # => # A void element: tag.div # => # A standard element: if no content is passed, and omits closing tags for those elements. {HTML5 void elements}[https://www.w3.org/TR/html5/syntax.html#void-elements] The tag builder respects # => tag.img src: 'open & shut.png', escape: false # => tag.img src: 'open & shut.png' +escape+. The generated tag names and attributes are escaped by default. This can be disabled using # => tag.div data: { city_state: %w( Chicago IL ) } from 1.4.3. This may come in handy when using jQuery's HTML5-aware .data() BigDecimals. Data attribute values are encoded to JSON, with the exception of strings, symbols, and Thus data-user-id can be accessed as dataset.userId. # => tag.article data: { user_id: 123 } To play nicely with JavaScript conventions, sub-attributes are dasherized. single +data+ or +aria+ key pointing to a hash of sub-attributes. HTML5 data-* and aria-* attributes can be set with a # => tag.input type: 'text', disabled: true Pass +true+ for any attributes that can render with no values, like +disabled+ and +readonly+. # => tag.section id: dom_id(@post) # => tag.section class: %w( kitties puppies ) Use symbol keyed options to add attributes to the generated tag. ==== Options # => The next great American novel starts here. <% end %> The next great American novel starts here. <%= tag.p do %> Content can also be captured with a block, which is useful in templates: tag.div tag.p('Hello world!') # => Hello world! tag.h1 'All titles fit to print' # => All titles fit to print Tags can pass content to embed within it: ==== Passing content where tag name can be e.g. br, div, section, article, or any tag really. tag.(optional content, options) Builds HTML5 compliant tags with a tag proxy. Every tag can be built with: === Building HTML tags Returns an HTML tag. def tag(name = nil, options = nil, open = false, escape = true) if name.nil? tag_builder else name = ERB::Util.xml_name_escape(name) if escape "<#{name}#{tag_builder.tag_options(options, escape) if options}#{open ? ">" : " />"}".html_safe end end def tag_builder def tag_builder @tag_builder ||= TagBuilder.new(self) end def token_list(*args) # => "123 foo bar" token_list(nil, false, 123, "", "foo", { bar: true }) # => "foo" token_list({ foo: true, bar: false }) # => "foo bar" token_list("foo", "foo bar") # => "foo bar" token_list("foo", "bar") ==== Examples Returns a string of tokens built from +args+. def token_list(*args) tokens = build_tag_values(*args).flat_map { |value| CGI.unescape_html(value.to_s).split(/\s+/) }.uniq safe_join(tokens, " ") end

Classes ActionView::Helpers::TagHelper::TagBuilder Instance Methods # build_tag_values # cdata_section # content_tag # escape_once # tag # tag_builder # token_list Defined in lib/action_view/helpers/tag_helper.rb