Javascript Date: next month

Question

I\'ve been using Javascript\'s Date for a project, but noticed today that my code that previously worked is no longer working correctly. Instead of producing Feb as expected

Answer 1

If you use moment.js, they have an add function. Here's the link - https://momentjs.com/docs/#/manipulating/add/

moment().add(7, 'months');

I also wrote a recursive function based on paxdiablo's answer to add a variable number of months. By default this function would add a month to the current date.

function addMonths(after = 1, now = new Date()) {
        var current;
        if (now.getMonth() == 11) {
            current = new Date(now.getFullYear() + 1, 0, 1);
        } else {
            current = new Date(now.getFullYear(), now.getMonth() + 1, 1);            
        }
        return (after == 1) ? current : addMonths(after - 1, new Date(now.getFullYear(), now.getMonth() + 1, 1))
    }

Example

console.log('Add 3 months to November', addMonths(3, new Date(2017, 10, 27)))

Output -

Add 3 months to November Thu Feb 01 2018 00:00:00 GMT-0800 (Pacific Standard Time)