Get next date from weekday in JavaScript

Question

How can one return the next date of a given weekday (it could be either a number 0-6 or names Sunday-Saturday).

Example, if today, on Friday

Answer 1

Here is another simple solution

//takes dayIndex from sunday(0) to saturday(6)
function nextDate(dayIndex) {
    var today = new Date();
    today.setDate(today.getDate() + (dayIndex - 1 - today.getDay() + 7) % 7 + 1);
    return today;
}
document.write("Next Sunday is: "+nextDate(0).toLocaleString()+"
");
document.write("Next Thursday is: "+nextDate(4).toLocaleString()+"
");
document.write("Next Saturday is: "+nextDate(6).toLocaleString());