diff --git a/lib/rules/style/sheet.js b/lib/rules/style/sheet.js
index 53bffdfba..b4a38bf7c 100644
--- a/lib/rules/style/sheet.js
+++ b/lib/rules/style/sheet.js
@@ -17,16 +17,23 @@ exports.name = rule;
exports.check = function (sr, done) {
if (!sr.config.styleSheet) return done();
const url = `https://www.w3.org/StyleSheets/TR/2016/${sr.config.styleSheet}`;
+ const dark = 'https://www.w3.org/StyleSheets/TR/2016/dark';
const sels = [
`head > link[rel=stylesheet][href='${url}']`,
- `head > link[rel=stylesheet][href='https:${url}']`,
`head > link[rel=stylesheet][href='${url}.css']`,
- `head > link[rel=stylesheet][href='https:${url}.css']`,
];
const lnk = sr.jsDocument.querySelectorAll(sels.join(', '));
if (!lnk.length) sr.error(missing, 'not-found');
- else if (util.nextAll(lnk, 'link[rel=stylesheet], style').length) {
- sr.error(notLast, 'last');
+ else {
+ const siblings = util.nextAll(lnk, 'link[rel=stylesheet], style');
+ if (
+ siblings.length ||
+ (siblings.length === 1 &&
+ (siblings[0].href !== dark ||
+ siblings[0].href !== `${dark}.css`))
+ ) {
+ sr.error(notLast, 'last');
+ }
}
done();
};
diff --git a/test/docs/headers/simple-dark-mode.html b/test/docs/headers/simple-dark-mode.html
new file mode 100644
index 000000000..e5f5e2b8c
--- /dev/null
+++ b/test/docs/headers/simple-dark-mode.html
@@ -0,0 +1,103 @@
+
+
+
+ Simple baseline headers valid document
+
+
+ Abstract
+
+ We are the internets!
+
+ Status of This Document
+ This section describes the status of this document at the time of its publication.
+ Other documents may supersede this document. A list of current W3C publications and the
+ latest revision of this technical report can be found in the
+ W3C technical reports index at
+ https://www.w3.org/TR/.
+
+ If you wish to make comments regarding this document, please send them to
+ public-html@w3.org
+ (subscribe ,
+ archives ).
+
+
+ It's a valid test!
+
+
+ Publication as a Working Draft does not imply endorsement by the W3C Membership. This is a
+ draft document and may be updated, replaced or obsoleted by other documents at any time. It is
+ inappropriate to cite this document as other than work in progress.
+
+
+ This document was produced by a group operating under the
+ 5 February 2004
+ W3C Patent Policy .
+ W3C maintains a
+ public list of
+ any patent disclosures made in connection with the deliverables of the group; that page
+ also includes instructions for disclosing a patent. An individual who has actual knowledge of
+ a patent which the individual believes contains
+ Essential
+ Claim(s) must disclose the information in accordance with
+ section 6 of the
+ W3C Patent Policy .
+
+
+ Table of Contents
+
+
+
+
diff --git a/test/rules.js b/test/rules.js
index bf1425e48..766517b2a 100644
--- a/test/rules.js
+++ b/test/rules.js
@@ -475,6 +475,10 @@ const tests = {
style: {
sheet: [
{ doc: 'headers/simple.html', config: { styleSheet: 'W3C-WD' } },
+ {
+ doc: 'headers/simple-dark-mode.html',
+ config: { styleSheet: 'W3C-WD' },
+ },
{
doc: 'headers/fails.html',
config: { styleSheet: 'W3C-WD' },