Add placeholder client logic to date primitive

src/components/ResponsiveDate.tsx

@@ -1,40 +1,66 @@
+'use client';
+
 import { formatDate } from '@/utility/date';
 import { clsx } from 'clsx/lite';
+import { useEffect, useState } from 'react';
 
 export default function ResponsiveDate({
   date,
   className,
   titleLabel,
+  timezone: timezoneFromProps,
 }: {
   date: Date
   className?: string
   titleLabel?: string
+  timezone?: string | null
 }) {
+  const [timezone, setTimezone] = useState(timezoneFromProps);
+
+  useEffect(() => {
+    if (timezoneFromProps === null) {
+      setTimezone(Intl.DateTimeFormat().resolvedOptions().timeZone);
+    }
+  }, [timezoneFromProps]);
+
+  const showPlaceholderContent = timezone === null;
+
+  const titleDateFormatted = formatDate(date).toLocaleUpperCase();
+
   const title = titleLabel
-    ? `${titleLabel}: ${formatDate(date).toLocaleUpperCase()}`
-    : formatDate(date).toLocaleUpperCase();
+    ? `${titleLabel}: ${titleDateFormatted}`
+    : titleDateFormatted;
+
+  const contentClass = showPlaceholderContent && 'opacity-0 select-none';
+
   return (
     <span
-      title={title}
-      className={clsx(className, 'uppercase')}
+      title={showPlaceholderContent ? 'LOADING LOCAL TIME' : title}
+      className={clsx(
+        'uppercase rounded-md transition-colors',
+        showPlaceholderContent && 'bg-dim',
+        className,
+      )}
     >
       {/* Small */}
       <span
-        className="xs:hidden"
+        className={clsx('xs:hidden', contentClass)}
         aria-hidden
       >
-        {formatDate(date, 'short')}
+        {formatDate(date, 'short', showPlaceholderContent)}
       </span>
       {/* Medium */}
       <span
-        className="hidden xs:inline-block sm:hidden"
+        className={clsx('hidden xs:inline-block sm:hidden', contentClass)}
         aria-hidden
       >
-        {formatDate(date, 'medium')}
+        {formatDate(date, 'medium', showPlaceholderContent)}
       </span>
       {/* Large */}
-      <span className="hidden sm:inline-block">
-        {formatDate(date)}
+      <span
+        className={clsx('hidden sm:inline-block', contentClass)}
+      >
+        {formatDate(date, undefined, showPlaceholderContent)}
       </span>
     </span>
   );

src/photo/PhotoDate.tsx

@@ -10,6 +10,7 @@ export default function PhotoDate({
   photo: Photo
   className?: string
   dateType?: 'takenAt' | 'createdAt' | 'updatedAt'
+  timezone?: string | null
 }) {
   const date = useMemo(() => {
     const date = new Date(dateType === 'takenAt'
@@ -41,6 +42,7 @@ export default function PhotoDate({
       date,
       className,
       titleLabel: getTitleLabel(),
+      timezone: null,
     }} />
   );
 }

src/site/globals.css

@@ -164,6 +164,10 @@
     @apply
       bg-white dark:bg-black
   }
+  .bg-dim {
+    @apply
+      bg-gray-100 dark:bg-gray-900/75
+  }
   .bg-content {
     @apply
       bg-white border-gray-200

src/utility/date.ts

@@ -1,25 +1,41 @@
 import { format, parseISO, parse } from 'date-fns';
 
-const DATE_STRING_FORMAT_TINY     = 'dd MMM yy';
-const DATE_STRING_FORMAT_SHORT    = 'dd MMM yyyy';
-const DATE_STRING_FORMAT_MEDIUM   = 'dd MMM yy h:mma';
-const DATE_STRING_FORMAT          = 'dd MMM yyyy h:mma';
-const DATE_STRING_FORMAT_POSTGRES = 'yyyy-MM-dd HH:mm:ss';
+const DATE_STRING_FORMAT_TINY               = 'dd MMM yy';
+const DATE_STRING_FORMAT_TINY_PLACEHOLDER   = '00 000 00';
+
+const DATE_STRING_FORMAT_SHORT              = 'dd MMM yyyy';
+const DATE_STRING_FORMAT_SHORT_PLACEHOLDER  = '00 000 0000';
+
+const DATE_STRING_FORMAT_MEDIUM             = 'dd MMM yy h:mma';
+const DATE_STRING_FORMAT_MEDIUM_PLACEHOLDER = '00 000 00 00:0000';
+
+const DATE_STRING_FORMAT_LONG               = 'dd MMM yyyy h:mma';
+const DATE_STRING_FORMAT_LONG_PLACEHOLDER   = '00 000 0000 00:0000';
+
+const DATE_STRING_FORMAT_POSTGRES           = 'yyyy-MM-dd HH:mm:ss';
 
 type AmbiguousTimestamp = number | string;
 
 type Length = 'tiny' | 'short' | 'medium' | 'long';
 
-export const formatDate = (date: Date, length: Length = 'long') => {
+export const formatDate = (
+  date: Date,
+  length: Length = 'long',
+  showPlaceholder?: boolean,
+) => {
   switch (length) {
-  case 'tiny':
-    return format(date, DATE_STRING_FORMAT_TINY);
-  case 'short':
-    return format(date, DATE_STRING_FORMAT_SHORT);
-  case 'medium':
-    return format(date, DATE_STRING_FORMAT_MEDIUM);
-  default:
-    return format(date, DATE_STRING_FORMAT);
+  case 'tiny': return showPlaceholder
+    ? DATE_STRING_FORMAT_TINY_PLACEHOLDER
+    : format(date, DATE_STRING_FORMAT_TINY);
+  case 'short': return showPlaceholder
+    ? DATE_STRING_FORMAT_SHORT_PLACEHOLDER
+    : format(date, DATE_STRING_FORMAT_SHORT);
+  case 'medium': return showPlaceholder
+    ? DATE_STRING_FORMAT_MEDIUM_PLACEHOLDER
+    : format(date, DATE_STRING_FORMAT_MEDIUM);
+  default: return showPlaceholder
+    ? DATE_STRING_FORMAT_LONG_PLACEHOLDER
+    : format(date, DATE_STRING_FORMAT_LONG);
   }
 };