DROPDOWN HTML & CSS

<div class="context">
    <a class="dropdown">Dropdown<i class='bx bx-chevron-down'></i></a>
    <ul class="hidden">
        <li><a href="#"><i class="bx bx-plus"></i>New tab to the right</a></li>
        <li class="divisor"></li>
        <li><a href="#"><i class="bx bx-save"></i>Save</a></li>
        <li><a href="#"><i class="bx bx-printer"></i>Print</a></li>
        <li><a href="#"><i class="bx bx-undo"></i>Undo</a></li>
        <li class="divisor"></li>
        <li><a href="#"><i class="bx bx-comment"></i>Comment</a></li>
        <li><a href="#"><i class="bx bx-expand-horizontal"></i>Inspect</a></li>
    </ul>
</div>

/* ===== Boxicons CSS ===== */
@import url("https://unpkg.com/boxicons@2.1.1/css/boxicons.min.css");

.context {
    position: relative;
}

.context .dropdown {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 220px;
    gap: 4px;
    background-color: rgb(0, 0, 0, 0);
    border: 1px solid rgb(0, 0, 0, .1);
    cursor: pointer;
    padding: 12px 20px;
    border-radius: 10px;
    transition: .3s;
}
.context .dropdown:hover {
    background-color: rgb(0, 0, 0, .1);
    border: 1px solid rgb(0, 0, 0, 0);
}
.context .dropdown i {
    margin-top: 2px;
    font-size: 1.3em;
    pointer-events: none;
    transform: rotate(0);
    transition: .3s;
}
.context .dropdown i.rotate {
    transform: rotate(180deg);
}

.context ul {
    position: absolute;
    left: 50%;
    transform: translate(-50%, 10px);
    opacity: 1;
    width: 100%;
    padding: 0;
    border-radius: 10px;
    border: 1px solid rgb(0, 0, 0, .1);
    color: rgb(20, 20, 20);
    list-style-type: none;
    animation: fade-in-context .3s;
}
.context ul li a{
    display: flex;
    align-items: center;
    color: #000;
    text-decoration: none;
    width: 100%;
    padding: 14px 20px;
    box-sizing: border-box;
    border-radius: 7px;
    cursor: pointer;
    user-select: none;
    transition: .3s;
    background-color:rgb(200, 200, 200, 0);
    font-size: 1em;
}
.context ul li a:hover {
    background-color: rgb(0, 0, 0, .1);
}
.context ul li a i {
    color: rgb(20, 20, 20, .7);
    font-size: 18px;
    margin-right: 10px;
}
.context ul .divisor {
    width: 100%;
    height: 1px;
    background-color: rgb(100, 100, 100, .2);
}

@keyframes fade-in-context {
  0% { transform: translate(-50%, 0); opacity: 0; }
  100% { transform: translate(-50%, 10px); opacity: 1; }
}

.context .hidden {
    display: none;
}

const dropDowns = document.querySelectorAll(".dropdown");
dropDowns.forEach((dropDown, index) => {
    dropDown.addEventListener("click", handleOnClickDropDown);
});
function handleOnClickDropDown(e) {
    e.target.parentNode.children[1].classList.toggle("hidden");
    e.target.children[0].classList.toggle("rotate");
}