phenomlab

li#thecategories {
        min-width: 250px;
        font-size: 90%;
        overflow: auto;
        height: calc(100vh - 110px);
}
ul.tree-branch {
    border-left: 1px solid var(--bs-link-color);
    margin-left: 22px;
}

phenomlab

$(document).ready(function() {
    $.getJSON('/api/categories', function(data, status) {
        $.each(data.categories, function(key, value) {
            var categorylist = $(" \
	<li class='dropdown-item tree-root'><span class='category-menu'><i class='fal " + this.icon + "'></i><a style='display: inherit;' class='dropdown-item rounded-1' href='/category/" + this.slug + "'>" + this.name + "</a></span></li> \
		<ul class='tree-branch' style='list-style: none;'>" +
                this.children.map(c => `<li class='dropdown-item tree-node'><span class='category-menu-tree-node'><i class='fal ${c.icon}'></i><a class='dropdown-item rounded-1' style='display: inherit;' href='/category/${c.slug}'>${c.name}</a></span></li>`).join(" ") +
                "</ul>"
            );
            if ($(window).width() < 767) {

phenomlab

2-D, two-dimensional
2FA, two-factor authentication
2G, second generation
3-D, three-dimensional
3G, 3rd Generation
3GPP, 3rd Generation Partnership Project
5G, 5th Generation
24x7, 24 hours a day seven days a week
24/7, 24 hours a day seven days a week
AA, Anti-alias