init

node_modules/date-fns/esm/isSunday/index.js

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+import toDate from "../toDate/index.js";
+import requiredArgs from "../_lib/requiredArgs/index.js";
+/**
+ * @name isSunday
+ * @category Weekday Helpers
+ * @summary Is the given date Sunday?
+ *
+ * @description
+ * Is the given date Sunday?
+ *
+ * @param {Date|Number} date - the date to check
+ * @returns {Boolean} the date is Sunday
+ * @throws {TypeError} 1 argument required
+ *
+ * @example
+ * // Is 21 September 2014 Sunday?
+ * const result = isSunday(new Date(2014, 8, 21))
+ * //=> true
+ */
+export default function isSunday(dirtyDate) {
+  requiredArgs(1, arguments);
+  return toDate(dirtyDate).getDay() === 0;
+}