Module | ActionView::Helpers::TagHelper
In: | lib/action_view/helpers/tag_helper.rb

Use these methods to generate HTML tags programmatically when you can‘t use a Builder. By default, they output XHTML compliant tags.

### Methods

cdata_section content_tag escape_once tag

### Included Modules

ERB::Util

### Public Instance methods

cdata_section(content)

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

      cdata_section("<hello world>")
       # => <![CDATA[<hello world>]]>

content_tag(name, content_or_options_with_block = nil, options = nil, &block)

Returns an HTML block tag of type `name` surrounding the `content`. Add HTML attributes by passing an attributes hash to `options`. For attributes with no value like (disabled and readonly), give it a value of true in the `options` hash. You can use symbols or strings for the attribute names.

      content_tag(:p, "Hello world!")
       # => <p>Hello world!</p>
      content_tag(:div, content_tag(:p, "Hello world!"), :class => "strong")
       # => <div class="strong"><p>Hello world!</p></div>
      content_tag("select", options, :multiple => true)
       # => <select multiple="multiple">...options...</select>

Instead of passing the content as an argument, you can also use a block in which case, you pass your `options` as the second parameter.

      <% content_tag :div, :class => "strong" do -%>
        Hello world!
      <% end -%>
       # => <div class="strong"><p>Hello world!</p></div>

escape_once(html)

Returns the escaped `html` without affecting existing escaped entities.

      escape_once("1 > 2 &amp; 3")
       # => "1 &lt; 2 &amp; 3"

tag(name, options = nil, open = false)

Returns an empty HTML tag of type `name` which by default is XHTML compliant. Setting `open` to true will create an open tag compatible with HTML 4.0 and below. Add HTML attributes by passing an attributes hash to `options`. For attributes with no value like (disabled and readonly), give it a value of true in the `options` hash. You can use symbols or strings for the attribute names.

      tag("br")
       # => <br />
      tag("br", nil, true)
       # => <br>
      tag("input", { :type => 'text', :disabled => true })
       # => <input type="text" disabled="disabled" />

[Validate]