Here’s a way to get the date for the next occurrence of a specific day of the week.
/*!
* Get the date for a specific day of the week
* (c) 2021 Chris Ferdinandi, MIT License, https://gomakethings.com
* @param {String} dayName The day of the week (case-insensitive)
* @return {Date} The date object
*/
function getNextDay (dayName) {
// The current day
let date = new Date();
let now = date.getDay();
// Days of the week
let days = ['sunday', 'monday', 'tuesday', 'wednesday', 'thursday', 'friday', 'saturday'];
// The index for the day you want
let day = days.indexOf(dayName.toLowerCase());
// Find the difference between the current day and the one you want
// If it's the same day as today (or a negative number), jump to the next week
let diff = day - now;
diff = diff < 1 ? 7 + diff : diff;
// Get the timestamp for the desired day
let nextDayTimestamp = date.getTime() + (1000 * 60 * 60 * 24 * diff);
// Get the next day
return new Date(nextDayTimestamp);
}Now, you can do something like this:
var nextMonday = getNextDay('Monday');
// You can use lowercase, too
var nextSaturday = getNextDay('saturday');
// You can even do weird mixed case
var nextFriday = getNextDay('friDay');