获取一周中特定日期的下一个日期

Question

Given a start date of 2014-07-08 (Tuesday) I would want to perform a check to find the closest day of the week.

For example, I need to be able to perform the following calls:

• First Monday (should return 2014-07-14)
• First Wednesday (should return 2014-07-09)
• First Saturday (should return 2014-07-12)
• Etc.

I know moment.js lets you do something like

moment("2014-07-08").day(1)

To get the date of Monday this week, however I need to know if the DOW is before/after the current date and apply the offset accordingly; if that makes any sense..

Any thoughts?

Answer 1

Just add 7 if the day of the week you are looking for is or was before the current day of the week:

var date = moment("2014-07-08");
var dow = date.day();
var nextX = date.day(X + dow <= X ? 7 : 0);