Implement <script nomodule>

third_party/WebKit/Source/core/dom/ScriptLoader.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 197 matching lines @@
     //    for the string "module", the script's type is "module"."
     out_script_type = ScriptType::kModule;
     return true;
   }
 
   // - "If neither of the above conditions are true, then abort these steps
   //    at this point. No script is executed."
   return false;
 }
 
+bool ScriptLoader::BlockForNoModule(ScriptType script_type, bool nomodule) {
+  return nomodule && script_type == ScriptType::kClassic &&
+         RuntimeEnabledFeatures::moduleScriptsEnabled();
+}
+
 bool ScriptLoader::IsScriptTypeSupported(LegacyTypeSupport support_legacy_types,
                                          ScriptType& out_script_type) const {
   return IsValidScriptTypeAndLanguage(element_->TypeAttributeValue(),
                                       element_->LanguageAttributeValue(),
                                       support_legacy_types, out_script_type);
 }
 
 // https://html.spec.whatwg.org/#prepare-a-script
 bool ScriptLoader::PrepareScript(const TextPosition& script_start_position,
                                  LegacyTypeSupport support_legacy_types) {
@@ skipping 61 matching lines @@
     return false;
 
   // 10. "If scripting is disabled for the script element, then abort these
   //      steps at this point. The script is not executed."
   if (!context_document->CanExecuteScripts(kAboutToExecuteScript))
     return false;
 
   // 11. "If the script element has a nomodule content attribute
   //      and the script's type is "classic", then abort these steps.
   //      The script is not executed."
-  // TODO(japhet): Implement this step.
+  if (BlockForNoModule(script_type_, element_->NomoduleAttributeValue()))
+    return false;
 
   // 13.
   if (!IsScriptForEventSupported())
     return false;
 
   // 14. is handled below.
 
   // 15. "Let CORS setting be the current state of the element's
   //      crossorigin content attribute."
   CrossOriginAttributeValue cross_origin =
@@ skipping 542 matching lines @@
   //     then abort these steps at this point. The script is not executed.
   return DeprecatedEqualIgnoringCase(event_attribute, "onload") ||
          DeprecatedEqualIgnoringCase(event_attribute, "onload()");
 }
 
 String ScriptLoader::ScriptContent() const {
   return element_->TextFromChildren();
 }
 
 }  // namespace blink