Cookie Consent - Create height for fixed popup with vanilla javascript

cookieconsent-create-height-for-fixed-popup.html

<link rel="stylesheet" type="text/css" href="//cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.1.0/cookieconsent.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.1.0/cookieconsent.min.js"></script>
<script>
    window.addEventListener("load", function () {
        var wrapper = document.body,
            cookieBarOptions = {
                "palette": {
                    "popup": {
                        "background": "#000"
                    },
                    "button": {
                        "background": "#f1d600"
                    }
                }
            },
            getCookieBar = function () {
                return document.querySelector(".cc-window");
            },
            getCookieBarHeight = function () {
                return getComputedStyle(getCookieBar())["height"];
            },
            getCookieBarBottomPosition = function () {
                return (getComputedStyle(getCookieBar())["bottom"]);
            },
            setCookeBarHeight = function () {
                wrapper.style.marginBottom = getCookieBarHeight();
                wrapper.style.paddingBottom = getCookieBarBottomPosition();
            },
            setCookeBarHeightEmpty = function () {
                wrapper.style.marginBottom = "";
                wrapper.style.paddingBottom = "";
            },
            throttle = (function (type, name, obj) {
                obj = obj || window;
                var running = false;
                var func = function () {
                    if (running) {
                        return;
                    }
                    running = true;
                    requestAnimationFrame(function () {
                        obj.dispatchEvent(new CustomEvent(name));
                        running = false;
                    });
                };
                obj.addEventListener(type, func);
            })("resize", "rafResize");

        cookieBarOptions.onPopupOpen = function () {
            setCookeBarHeight();
            window.addEventListener("rafResize", setCookeBarHeight);
        };

        cookieBarOptions.onPopupClose = function () {
            setCookeBarHeightEmpty();
            window.removeEventListener("rafResize", setCookeBarHeight);
        };

        window.cookieconsent.initialise(cookieBarOptions);
    });
</script>