HTMLHyperlinkElementUtils doesn't support hostname and search

Adobe XD UXP Plugin API
1

Following code prints undefined, /ru/docs/Web/API/FormData/append, undefined

var anchorElement = document.createElement('a');
    anchorElement.href = "https://developer.mozilla.org/ru/docs/Web/API/FormData/append";
    console.log("anchor details", anchorElement.hostname, anchorElement.pathname, anchorElement.search);
2

not all elements are supported in XD. Please see the reference page.