I currently have this code. This opens the YT search in a new tab when you click the middle-mouse button:

(function() {
    'use strict';
 
    var searchIcon = document.getElementById("search-icon-legacy");
    if (searchIcon) {
        searchIcon.addEventListener("mousedown", function(event) {
            event.preventDefault();
            var searchInput = document.getElementsByClassName("ytd-searchbox")[3].value.trim();
            if (event.which === 2 && searchInput) {
                window.open("https://www.youtube.com/results?search_query=" + encodeURIComponent(searchInput), "_blank");
            }
        });
    }
})();

Picture

I’m now trying to focus the search suggestions by middle-clicking them, but I’m struggling because I don’t know how to bring them into focus like the search button, which is an element.