var priceWidths = document.querySelectorAll(".flex-left");
for (var i = 0; i < priceWidths.length; i++) {
    if (typeof priceWidths[i].querySelectorAll(".first-price .big")[0] !== "undefined") {
        var priceWidth = priceWidths[i].querySelectorAll(".first-price .small-price")[0].offsetWidth;
    }
    var popupIcon = priceWidths[i].querySelectorAll(".slider-ln-popup")[0];
    if (typeof popupIcon !== "undefined") {
        popupIcon.style.width = "20px";
        popupIcon.style.right = 0;
        popupIcon.style.transform = "translate(-" + (priceWidth - 20) + "px, 15px)";
    }
}