From a5978467fdf7d7d0131c77c6bea73b849d07da9a Mon Sep 17 00:00:00 2001
From: "Michael[tm] Smith" <mike@w3.org>
Date: Wed, 28 Nov 2018 11:31:06 +0900
Subject: [PATCH] Allow rel=modulepreload for the link element

Fixes https://github.com/validator/validator/issues/733 Thanks @SimonSiefke
---
 CHANGELOG.md                                             | 6 ++++++
 src/nu/validator/checker/schematronequiv/Assertions.java | 6 +++++-
 src/nu/validator/datatype/LinkRel.java                   | 3 ++-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c082596f9..57145a8a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@ With a few exceptions, this is a record of mainly just user-facing
 changes—that is, either changes to the actual behavior of the checker, or
 changes to any options/interfaces the checker exposes for developers.
 
+# N.N.N
+05 November 2018
+NN XXX NNNN
+  - Disallow `accept-charset` values other than `UTF-8`
+  - Allow `rel=modulepreload` for the `link` element
+
 # 18.11.5
 05 November 2018
   - Fix bugs that can cause the command-line checker to emit broken JSON output
diff --git a/src/nu/validator/checker/schematronequiv/Assertions.java b/src/nu/validator/checker/schematronequiv/Assertions.java
index ab64b3f67..c885906fd 100644
--- a/src/nu/validator/checker/schematronequiv/Assertions.java
+++ b/src/nu/validator/checker/schematronequiv/Assertions.java
@@ -2688,7 +2688,9 @@ else if ("bdo" == localName && atts.getIndex("", "dir") < 0) {
                             .toLowerCase().split("\\s+"));
                 }
                 if (atts.getIndex("", "as") > -1
-                        && ((relList != null && !relList.contains("preload")
+                        && ((relList != null //
+                                && !(relList.contains("preload")
+                                        || relList.contains("modulepreload"))
                                 || !hasRel))) {
                     err("A \u201Clink\u201D element with an"
                             + " \u201Cas\u201D attribute must have a"
@@ -2753,6 +2755,7 @@ else if ("bdo" == localName && atts.getIndex("", "dir") < 0) {
                 if ((ancestorMask & BODY_MASK) != 0
                         && (relList != null
                                 && !(relList.contains("dns-prefetch")
+                                        || relList.contains("modulepreload")
                                         || relList.contains("pingback")
                                         || relList.contains("preconnect")
                                         || relList.contains("prefetch")
@@ -2767,6 +2770,7 @@ else if ("bdo" == localName && atts.getIndex("", "dir") < 0) {
                             + " \u201Citemprop\u201D attribute or has a"
                             + " \u201Crel\u201D attribute whose value contains"
                             + " \u201Cdns-prefetch\u201D,"
+                            + " \u201Cmodulepreload\u201D,"
                             + " \u201Cpingback\u201D,"
                             + " \u201Cpreconnect\u201D,"
                             + " \u201Cprefetch\u201D,"
diff --git a/src/nu/validator/datatype/LinkRel.java b/src/nu/validator/datatype/LinkRel.java
index b4cc46083..f334766d5 100644
--- a/src/nu/validator/datatype/LinkRel.java
+++ b/src/nu/validator/datatype/LinkRel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2017 Mozilla Foundation
+ * Copyright (c) 2013-2018 Mozilla Foundation
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
@@ -48,6 +48,7 @@ public final class LinkRel extends AbstractRel {
             registeredValues.add("icon");
             registeredValues.add("license");
             registeredValues.add("mask-icon");
+            registeredValues.add("modulepreload");
             registeredValues.add("next");
             registeredValues.add("pingback");
             registeredValues.add("preconnect");