JavaScript for getting the previous Monday

Question

I would like for the previous Monday to appear in the field where a user enters today\'s date.

E.g.: If today\'s date is entered 29-Jan-16 t

Answer 1

The easiest solution is to go back the number of days based on today's date. For example, if today's day(0) is Sunday, you can go back 6 days to find the previous Monday. If Today is Monday, you can go back 7 days. Therefore using a modulo will help you in this scenario simply because the number of days you will need to go back is %7 plus 6. Let me break it down in simple steps.

var today=new Date();

This will give you today's date. Now,

var todaysDay=today.getDay();

This will give you your day starting with zero.

var goBack=today.getDay()%7+6;

Now, declare a new date.

var lastMonday=new Date().setDate(today.getDate()-goBack);

Now, this will give you a numeric date value. Convert it back to Date

var desiredDate=new Date(lastMonday);