- Patch #1260800 by David_Rothstein, lewisnyman, yoroy, nod_, thedavidmeister,...

- Patch #1260800 by David_Rothstein, lewisnyman, yoroy, nod_, thedavidmeister, effulgentsia: kill the overlay for widths below 640 pixels.

core/misc/drupal.js

@@ -112,6 +112,15 @@ Drupal.detachBehaviors = function (context, settings, trigger) {
   }
 };
 
+/**
+ * Helper to test document width for mobile configurations.
+ * @todo Temporary solution for the mobile initiative.
+ */
+Drupal.checkWidthBreakpoint = function (width) {
+  width = width || Drupal.settings.widthBreakpoint || 640;
+  return (document.documentElement.clientWidth > width);
+};
+
 /**
  * Encode special characters in a plain-text string for display as HTML.
  *

core/modules/overlay/overlay-parent.js

@@ -23,6 +23,12 @@ Drupal.behaviors.overlayParent = {
       // permalinks open the overlay.
       .triggerHandler('hashchange.drupal-overlay');
 
+    // Do not use the overlay on devices with low screen width.
+    // @todo Replace with conditional loading.
+    if(!Drupal.checkWidthBreakpoint()) {
+      return;
+    }
+
     $(document)
       // Instead of binding a click event handler to every link we bind one to
       // the document and only handle events that bubble up. This allows other