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node_modules/date-fns/closestTo.js

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+import { normalizeDates } from "./_lib/normalizeDates.js";
+import { closestIndexTo } from "./closestIndexTo.js";
+import { constructFrom } from "./constructFrom.js";
+
+/**
+ * The {@link closestTo} function options.
+ */
+
+/**
+ * The {@link closestTo} function result type. It resolves the proper data type.
+ * It uses the first argument date object type, starting from the date argument,
+ * then the start interval date, and finally the end interval date. If
+ * a context function is passed, it uses the context function return type.
+ */
+
+/**
+ * @name closestTo
+ * @category Common Helpers
+ * @summary Return a date from the array closest to the given date.
+ *
+ * @description
+ * Return a date from the array closest to the given date.
+ *
+ * @typeParam DateToCompare - Date to compare argument type.
+ * @typeParam DatesType - Dates array argument type.
+ * @typeParam Options - Options type.
+ *
+ * @param dateToCompare - The date to compare with
+ * @param dates - The array to search
+ *
+ * @returns The date from the array closest to the given date or undefined if no valid value is given
+ *
+ * @example
+ * // Which date is closer to 6 September 2015: 1 January 2000 or 1 January 2030?
+ * const dateToCompare = new Date(2015, 8, 6)
+ * const result = closestTo(dateToCompare, [
+ *   new Date(2000, 0, 1),
+ *   new Date(2030, 0, 1)
+ * ])
+ * //=> Tue Jan 01 2030 00:00:00
+ */
+export function closestTo(dateToCompare, dates, options) {
+  const [dateToCompare_, ...dates_] = normalizeDates(
+    options?.in,
+    dateToCompare,
+    ...dates,
+  );
+
+  const index = closestIndexTo(dateToCompare_, dates_);
+
+  if (typeof index === "number" && isNaN(index))
+    return constructFrom(dateToCompare_, NaN);
+
+  if (index !== undefined) return dates_[index];
+}
+
+// Fallback for modularized imports:
+export default closestTo;