Calculate an expected delivery date (accounting for holidays) in business days using JavaScript?

Question

After revisiting this script, and some modifications, the following is available to allow a user to add a feature that calculates the expected delivery date.

Answer 1

Your main problem was that adding safety each time meant you were adding multiple days each time it looped, instead of 1. So first loop = 1, second = 1+2, etc.

I believe this works as you'd like:

var businessDays = 10; // this will come from a form
var counter = 0;  // I have a counter
var safety = 0;  // I have a safety variable
var ship = today = new Date();  // I have the current date and an initialized shipping variable but the buy date will come from a form
console.log(">>> today = " + today);
// now the loop...

while( ++safety <30 ){
ship.setDate(ship.getDate()+1 );
switch( ship.getDay() ){

    case 0: // Sunday
    case 6: // Saturday

    break;

    default:
        counter++;
    }

if( counter >= businessDays ) break;

}
  // add a number of days
// the expected shipping date


console.log(">>> days  = " + businessDays);
console.log(">>> ship = " + ship);