js

    const currentDate = new Date();
    // Sunday - Saturday : 0 - 6.
    const currentDayOfWeek = currentDate.getDay();
    // 1 - 31.
    const currentDayOfMonth = currentDate.getDate();
    // thursday would be: 7 - 4.
    const daysUntilSunday = 7 - currentDayOfWeek;
    // currentDayOfMonth + 7 would be the same day,but
    // next week,then just subtract the difference between
    // now and sunday.
    const nextSunday = new Date().setDate(currentDayOfMonth + 7 - currentDayOfWeek);
    const nextSundayAt3pm = new Date(nextSunday).setHours(15,0);

Moment.js

使用moment.js，您可以获取并设置星期几 https://momentjs.com/docs/#/get-set/day/

您需要做的就是创建一个新的Moment，然后将日期设置为周日。但是..

  

如果给出的值是0到6，则结果日期将在当前（星期日至星期六）的一周之内。

由于它将周日识别为一周的开始，因此您需要在当前周的开始时获取星期日，然后在日期前加上7天以从今天开始获取下一个星期日。

换句话说，您将天数加7。

    // 0 - 6 sets it to a date of the week within the current week.
    // if you provide a number greater than 6,it will bubble in to
    // later weeks.
    // i.e. 7 = 0 + 6 + 1. where 0 would be the previous Sunday,6 would
    // set it to Saturday of the current week,then adding an additional 1
    // will set it to the Sunday of the next week.
    const nextSunday = new moment(7); // sets the date to next Sunday.

    // now just set the time to 3pm.
    nextSunday.hour(15);