get_coupon_from_URL_parameter.js

var callbackFunction = function() {
    console.log("Coupon " + discount + " added")
}

var add_url_coupon = function() {
    queryString = window.location.search;
    urlParams = new URLSearchParams(queryString);
    if (urlParams.has('discount')) {
        discount = urlParams.get('discount')
        Jumpseller.addCouponToCart(discount, {
            callback: callbackFunction
        })
    }
}

$(document).ready(add_url_coupon);