When translating CSS
selectors to XPath queries with Nokogiri::CSS.xpath_for
, the XPathVisitor
class allows for changing some of the behaviors related to builtin xpath functions and quirks of HTML5
.
# File lib/nokogiri/css/xpath_visitor.rb, line 57 def initialize(builtins: BuiltinsConfig::NEVER, doctype: DoctypeConfig::XML) unless BuiltinsConfig::VALUES.include?(builtins) raise(ArgumentError, "Invalid values #{builtins.inspect} for builtins: keyword parameter") end unless DoctypeConfig::VALUES.include?(doctype) raise(ArgumentError, "Invalid values #{doctype.inspect} for doctype: keyword parameter") end @builtins = builtins @doctype = doctype end
builtins:
(BuiltinsConfig
) Determine when to use Nokogiri’s built-in xpath functions for performance improvements.
doctype:
(DoctypeConfig
) Make document-type-specific accommodations for CSS
queries.
# File lib/nokogiri/css/xpath_visitor.rb, line 74 def config { builtins: @builtins, doctype: @doctype } end
a Hash representing the configuration of the XPathVisitor
, suitable for use as part of the CSS
cache key.
© 2008–2018 Aaron Patterson, Mike Dalessio, Charles Nutter, Sergio Arbeo,
Patrick Mahoney, Yoko Harada, Akinori MUSHA, John Shahid, Lars Kanis
Licensed under the MIT License.
https://nokogiri.org/rdoc/Nokogiri/CSS/XPathVisitor.html