!(function (e, t) {
    if ('object' == typeof exports && 'undefined' != typeof module) {
        module.exports = t();
    } else {
        if ('function' == typeof define && define.amd) {
            define(t);
        } else {
            (e = 'undefined' != typeof globalThis ? globalThis : e || self).dayjs_plugin_weekOfYear = t();
        }
    }
})(this, function () {
    'use strict';

    var e = 'week';
    var t = 'year';
    return function (i, n, r) {
        var f = n.prototype;
        f.week = function (i) {
            if (void 0 === i) {
                i = null;
            }
            if (null !== i) {
                return this.add(7 * (i - this.week()), 'day');
            }
            var n = this.$locale().yearStart || 1;
            if (11 === this.month() && this.date() > 25) {
                var f = r(this).startOf(t).add(1, t).date(n);
                var s = r(this).endOf(e);
                if (f.isBefore(s)) {
                    return 1;
                }
            }
            var a = r(this).startOf(t).date(n).startOf(e).subtract(1, 'millisecond');
            var o = this.diff(a, e, true);
            return o < 0 ? r(this).startOf('week').week() : Math.ceil(o);
        };
        f.weeks = function (e) {
            if (void 0 === e) {
                e = null;
            }
            return this.week(e);
        };
    };
});