aliexpress total cost userscript

aliexpress_total_cost.js

// ==UserScript==
// @name        New script - aliexpress.com
// @namespace   Violentmonkey Scripts
// @match       https://www.aliexpress.com/item/\d*.html
// @grant       none
// @version     1.0
// @author      -
// @description 3/24/2022, 5:28:33 PM
// ==/UserScript==

(function() {
    let $ = document.querySelector.bind(document);
    let updateTotal = function() {
        let totalEle = document.querySelector("#total_cost_ele");
        if (!totalEle) {
            let pp = document.querySelectorAll(".product-price")[0];
            totalEle = document.createElement("span");
            totalEle.id = "total_cost_ele";
            pp.insertBefore(document.createElement("br"), pp.firstChild);
            pp.insertBefore(totalEle, pp.firstChild);
            let totalTextEle = document.createElement("span");
            totalTextEle.textContent = "Total: ";
            totalEle.style = totalTextEle.style = "font-size: large; font-weight: bold;";
            pp.insertBefore(totalTextEle, pp.firstChild);
        }
        // now to calculate total..
        let totalCost = null;
        try {
            let baseCost = Number($(".product-price-value").textContent.match(/\d+(?:(?:\.|\,)\d+)?/)[0].replace(",", "."));
            let shippingCost = $(".dynamic-shipping-line").textContent.match(/\d+(?:(?:\.|\,)\d+)?/);
            if(shippingCost && shippingCost[0]){
              shippingCost=Number(shippingCost[0].replace(",", "."));
            }else{
              shippingCost=0;
            }
            totalCost = baseCost + shippingCost;
        } catch (ex) {
            totalCost = "error calculating totalCost: " + ex.toString() + " - this script has crashed";
            crash = ex;
            totalEle.textContent = totalCost;
            throw ex;
        }
        totalEle.textContent = totalCost.toFixed(2);
        setTimeout(updateTotal, 500);
    };
    updateTotal();
})();