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How to ensure well-formed HTML5? #1243

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tkrotoff opened this issue Feb 16, 2015 · 1 comment
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How to ensure well-formed HTML5? #1243

tkrotoff opened this issue Feb 16, 2015 · 1 comment
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topic/HTML5

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@tkrotoff
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HTML5 allows the integration of SVG and MathML and this seems to be unsupported by Nokogiri:

require 'nokogiri'

html = <<-EOXML
<!DOCTYPE html>
<html>
  <head>
    <title>Test</title>
  </head>
  <body>
    <a title="RSS" href="/feed.xml">
      <svg class="icon icon-rss" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 8 8">
        <path class="background" fill="#f28c36"
              d="M 1.5,0 C 0.669,0 0,0.669 0,1.5 l 0,5 C 0,7.331 0.669,8 1.5,8 l 5,0 C 7.331,8 8,7.331 8,6.5 l 0,-5 C 8,0.669 7.331,0 6.5,0 l -5,0 z M 1,1 A 6,6 0 0 1 7,7 L 6,7 A 5,5 0 0 0 1,2 L 1,1 z M 1,3 A 4,4 0 0 1 5,7 L 4,7 A 3,3 0 0 0 1,4 L 1,3 z M 2,5 C 2.5522847,5 3,5.4477153 3,6 3,6.5522847 2.5522847,7 2,7 1.4477153,7 1,6.5522847 1,6 1,5.4477153 1.4477153,5 2,5 z"></path>
        <path class="foreground" fill="white"
              d="M 1,1 1,2 A 5,5 0 0 1 6,7 L 7,7 A 6,6 0 0 0 1,1 z M 1,3 1,4 A 3,3 0 0 1 4,7 L 5,7 A 4,4 0 0 0 1,3 z M 2,5 C 1.4477153,5 1,5.4477153 1,6 1,6.5522847 1.4477153,7 2,7 2.5522847,7 3,6.5522847 3,6 3,5.4477153 2.5522847,5 2,5 z"></path>
      </svg>
    </a>
  </body>
</html>
EOXML

doc = Nokogiri::HTML html

puts doc.errors

Output:

Tag svg invalid
Tag path invalid
Tag path invalid

(This HTML5 code is valid according to http://validator.w3.org/check)
(I'm using Nokogiri through HTML::Proofer for a Jekyll website)
@doktorbro doktorbro mentioned this issue Feb 25, 2015
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@gkellogg gkellogg mentioned this issue Jun 10, 2015
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@flavorjones
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Nokogiri's underlying HTML parsers (libxml2 for CRuby, nekoHTML for JRuby) are HTML4 parsers, and so for some time there hasn't been much we can do to help with HTML5 other than to recommend that people use the Nokogumbo gem, which extends Nokogiri's API and provides an HTML5 parser.

I'm happy to let you know that #2204 is driving the merger of Nokogumbo and its HTML5 parser, and so Nokogiri v1.12 will support HTML5 once it is release. Please follow that issue for status updates.

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@flavorjones @tkrotoff