Issue #618 - Implement async attribute for inline module scripts. (uplift)

This commit does several things:
- Moves the pref check from ScriptLoader to ns[I]Document so it can be called on
the document.
- Changes the atrribute freezing function to a better name that takes the
document as a parameter.
- Sets the proper async/defer attributes on HTML script elements based on
keywords and whether they are module scripts or not.

2 files changed, 15 insertions, 0 deletions

diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index d0634b0f9..de793bfab 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -12745,3 +12745,16 @@ nsIDocument::GetSelection(ErrorResult& aRv)
 
   return nsGlobalWindow::Cast(window)->GetSelection(aRv);
 }
+
+bool
+nsIDocument::ModuleScriptsEnabled()
+{
+  static bool sEnabledForContent = false;
+  static bool sCachedPref = false;
+  if (!sCachedPref) {
+    sCachedPref = true;
+    Preferences::AddBoolVarCache(&sEnabledForContent, "dom.moduleScripts.enabled", false);
+  }
+
+  return nsContentUtils::IsChromeDoc(this) || sEnabledForContent;
+}
\ No newline at end of file
diff --git a/dom/base/nsIDocument.h b/dom/base/nsIDocument.h
index 506acc7e4..29afa5439 100644
--- a/dom/base/nsIDocument.h
+++ b/dom/base/nsIDocument.h
@@ -2872,6 +2872,8 @@ public:
   virtual void ScheduleIntersectionObserverNotification() = 0;
   virtual void NotifyIntersectionObservers() = 0;
 
+  bool ModuleScriptsEnabled();
+
 protected:
   bool GetUseCounter(mozilla::UseCounter aUseCounter)
   {