JSFiddle - React, Tailwind, and code Playground

JavaScript

var today = new Date();
var business_days = 14;

var deliveryDate = today; //will be incremented by the for loop
var total_days = business_days; //will be used by the for loop
for(var days=1; days <= total_days; days++) {
	deliveryDate = new Date(today.getTime() + (days *24*60*60*1000));
	if(deliveryDate.getDay() == 0 || deliveryDate.getDay() == 6) {
		//it's a weekend day so we increase the total_days of 1
		total_days++
	}
}

console.log(deliveryDate);