var div = document.getElementById("vrijwilligerswerk");
if (!div)
    div = document.getElementById("Vrijwilligerswerk");
const iframe = document.createElement("iframe");
iframe.src = "https://www.vrijwilligerswerk.be/widget/8a61390f-8650-4153-94c5-cebf07f63510/search";
iframe.style.height = "100%"; iframe.style.width = "100%";
iframe.style.overflow = "hidden";
// div.style.overflow = "hidden";       
iframe.style.border = "none";
iframe.style.height = '800px';
div.appendChild(iframe);
iframe.contentDocument.onreadystatechange = function () {
    if (iframe.contentDocument.readyState === "complete") {
        iframe.style.height = iframe.contentDocument.body.scrollHeight + 'px';
    }
}