v1.0 with SW PWA enabled

frontend/node_modules/date-fns/locale/en-US/_lib/localize.mjs

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+import { buildLocalizeFn } from "../../_lib/buildLocalizeFn.mjs";
+
+const eraValues = {
+  narrow: ["B", "A"],
+  abbreviated: ["BC", "AD"],
+  wide: ["Before Christ", "Anno Domini"],
+};
+
+const quarterValues = {
+  narrow: ["1", "2", "3", "4"],
+  abbreviated: ["Q1", "Q2", "Q3", "Q4"],
+  wide: ["1st quarter", "2nd quarter", "3rd quarter", "4th quarter"],
+};
+
+// Note: in English, the names of days of the week and months are capitalized.
+// If you are making a new locale based on this one, check if the same is true for the language you're working on.
+// Generally, formatted dates should look like they are in the middle of a sentence,
+// e.g. in Spanish language the weekdays and months should be in the lowercase.
+const monthValues = {
+  narrow: ["J", "F", "M", "A", "M", "J", "J", "A", "S", "O", "N", "D"],
+  abbreviated: [
+    "Jan",
+    "Feb",
+    "Mar",
+    "Apr",
+    "May",
+    "Jun",
+    "Jul",
+    "Aug",
+    "Sep",
+    "Oct",
+    "Nov",
+    "Dec",
+  ],
+
+  wide: [
+    "January",
+    "February",
+    "March",
+    "April",
+    "May",
+    "June",
+    "July",
+    "August",
+    "September",
+    "October",
+    "November",
+    "December",
+  ],
+};
+
+const dayValues = {
+  narrow: ["S", "M", "T", "W", "T", "F", "S"],
+  short: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"],
+  abbreviated: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"],
+  wide: [
+    "Sunday",
+    "Monday",
+    "Tuesday",
+    "Wednesday",
+    "Thursday",
+    "Friday",
+    "Saturday",
+  ],
+};
+
+const dayPeriodValues = {
+  narrow: {
+    am: "a",
+    pm: "p",
+    midnight: "mi",
+    noon: "n",
+    morning: "morning",
+    afternoon: "afternoon",
+    evening: "evening",
+    night: "night",
+  },
+  abbreviated: {
+    am: "AM",
+    pm: "PM",
+    midnight: "midnight",
+    noon: "noon",
+    morning: "morning",
+    afternoon: "afternoon",
+    evening: "evening",
+    night: "night",
+  },
+  wide: {
+    am: "a.m.",
+    pm: "p.m.",
+    midnight: "midnight",
+    noon: "noon",
+    morning: "morning",
+    afternoon: "afternoon",
+    evening: "evening",
+    night: "night",
+  },
+};
+
+const formattingDayPeriodValues = {
+  narrow: {
+    am: "a",
+    pm: "p",
+    midnight: "mi",
+    noon: "n",
+    morning: "in the morning",
+    afternoon: "in the afternoon",
+    evening: "in the evening",
+    night: "at night",
+  },
+  abbreviated: {
+    am: "AM",
+    pm: "PM",
+    midnight: "midnight",
+    noon: "noon",
+    morning: "in the morning",
+    afternoon: "in the afternoon",
+    evening: "in the evening",
+    night: "at night",
+  },
+  wide: {
+    am: "a.m.",
+    pm: "p.m.",
+    midnight: "midnight",
+    noon: "noon",
+    morning: "in the morning",
+    afternoon: "in the afternoon",
+    evening: "in the evening",
+    night: "at night",
+  },
+};
+
+const ordinalNumber = (dirtyNumber, _options) => {
+  const number = Number(dirtyNumber);
+
+  // If ordinal numbers depend on context, for example,
+  // if they are different for different grammatical genders,
+  // use `options.unit`.
+  //
+  // `unit` can be 'year', 'quarter', 'month', 'week', 'date', 'dayOfYear',
+  // 'day', 'hour', 'minute', 'second'.
+
+  const rem100 = number % 100;
+  if (rem100 > 20 || rem100 < 10) {
+    switch (rem100 % 10) {
+      case 1:
+        return number + "st";
+      case 2:
+        return number + "nd";
+      case 3:
+        return number + "rd";
+    }
+  }
+  return number + "th";
+};
+
+export const localize = {
+  ordinalNumber,
+
+  era: buildLocalizeFn({
+    values: eraValues,
+    defaultWidth: "wide",
+  }),
+
+  quarter: buildLocalizeFn({
+    values: quarterValues,
+    defaultWidth: "wide",
+    argumentCallback: (quarter) => quarter - 1,
+  }),
+
+  month: buildLocalizeFn({
+    values: monthValues,
+    defaultWidth: "wide",
+  }),
+
+  day: buildLocalizeFn({
+    values: dayValues,
+    defaultWidth: "wide",
+  }),
+
+  dayPeriod: buildLocalizeFn({
+    values: dayPeriodValues,
+    defaultWidth: "wide",
+    formattingValues: formattingDayPeriodValues,
+    defaultFormattingWidth: "wide",
+  }),
+};