fix(busy): Show pulse if only UI are recalculating (#4137)

* fix(busy): Show pulse if only UI are recalculating

Because UI elements don't get spinners

Author: gadenbuie

NEWS.md

@@ -4,6 +4,8 @@
 
 * Small improvements to the default pulse busy indicator to better blend with any background. It's also now slightly smaller by default. (#4122)
 
+* When spinners and the pulse busy indicators are enabled, Shiny now shows the pulse indicator when dynamic UI elements are recalculating if no other spinners are present in the app. (#4137)
+
 ## Bug fixes
 
 * Fixed a bug in `conditionalPanel()` that would cause the panel to repeatedly show/hide itself when the provided condition was not boolean. (@kamilzyla, #4127)

inst/www/shared/busy-indicators/busy-indicators.css

@@ -100,7 +100,9 @@
   &.shiny-busy::after {
     @include shiny-page-busy;
   }
-  &.shiny-busy:has(.recalculating)::after {
+  // Hide the pulse if there are spinners on the page
+  // (Note: UI outputs don't get spinners)
+  &.shiny-busy:has(.recalculating:not(.shiny-html-output))::after {
     display: none;
   }
   &.shiny-busy:has(#shiny-disconnected-overlay)::after {