Themes: Fix issue generating themes due to code in @grafana/data accessing…

Themes: Fix issue generating themes due to code in @grafana/data accessing window object during module load (#27441)

packages/grafana-data/src/valueFormats/categories.ts

@@ -4,7 +4,7 @@ import {
   dateTimeAsIsoNoDateIfToday,
   dateTimeAsUS,
   dateTimeAsUSNoDateIfToday,
-  dateTimeAsLocal,
+  getDateTimeAsLocalFormat,
   dateTimeFromNow,
   toClockMilliseconds,
   toClockSeconds,
@@ -176,7 +176,7 @@ export const getCategories = (): ValueFormatCategory[] => [
       { name: 'Datetime ISO (No date if today)', id: 'dateTimeAsIsoNoDateIfToday', fn: dateTimeAsIsoNoDateIfToday },
       { name: 'Datetime US', id: 'dateTimeAsUS', fn: dateTimeAsUS },
       { name: 'Datetime US (No date if today)', id: 'dateTimeAsUSNoDateIfToday', fn: dateTimeAsUSNoDateIfToday },
-      { name: 'Datetime local', id: 'dateTimeAsLocal', fn: dateTimeAsLocal },
+      { name: 'Datetime local', id: 'dateTimeAsLocal', fn: getDateTimeAsLocalFormat() },
       { name: 'From Now', id: 'dateTimeFromNow', fn: dateTimeFromNow },
     ],
   },

packages/grafana-data/src/valueFormats/dateTimeFormatters.ts

@@ -369,16 +369,19 @@ export const dateTimeAsIso = toDateTimeValueFormatter('YYYY-MM-DD HH:mm:ss');
 export const dateTimeAsIsoNoDateIfToday = toDateTimeValueFormatter('YYYY-MM-DD HH:mm:ss', 'HH:mm:ss');
 export const dateTimeAsUS = toDateTimeValueFormatter('MM/DD/YYYY h:mm:ss a');
 export const dateTimeAsUSNoDateIfToday = toDateTimeValueFormatter('MM/DD/YYYY h:mm:ss a', 'h:mm:ss a');
-export const dateTimeAsLocal = toDateTimeValueFormatter(
-  localTimeFormat({
-    year: 'numeric',
-    month: '2-digit',
-    day: '2-digit',
-    hour: '2-digit',
-    minute: '2-digit',
-    second: '2-digit',
-  })
-);
+
+export function getDateTimeAsLocalFormat() {
+  return toDateTimeValueFormatter(
+    localTimeFormat({
+      year: 'numeric',
+      month: '2-digit',
+      day: '2-digit',
+      hour: '2-digit',
+      minute: '2-digit',
+      second: '2-digit',
+    })
+  );
+}
 
 export function dateTimeFromNow(
   value: number,