How to find business days in current month with Javascript?

Question

How can i create function for finding numbers of business days of current month? Can you code in simple javascript without Jquery.

    function daysInMonth(i         


        

Answer 1

Arrow function style with chaining:

(
    (year, month) => 
        new Array(32 - new Date(year, month, 32).getDate())
        .fill(1)
        .filter(
            (id, index) =>
                [0, 6].indexOf(
                    new Date(year, month, index + 1).getDay()) === -1
                ).length
)(2017, 5)