JSFiddle - React, Tailwind, and code Playground

by Leo Chen

HTML

<div id="header">
    <div class="empty"></div>
    <div class="nav">
        <ul>
            <li class="options1">
                <a href="javascript:;">選項1</a>
                <div class="child none">
                  <ul>
                    <li>
                        <a href="javascript:;">子選項1</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項2</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項3</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項4</a>
                    </li>
                  </ul>
                </div>
            </li>
            <li class="options2">
                <a href="javascript:;">選項2</a>
                <div class="child none">
                  <ul>
                    <li>
                        <a href="javascript:;">子選項1</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項2</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項3</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項4</a>
                    </li>
                  </ul>
                </div>
            </li>
            <li class="options3">
                <a href="javascript:;">選項3</a>
                <div class="child none">
                  <ul>
                    <li>
                        <a href="javascript:;">子選項1</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項2</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項3</a>
                    </li>
                    <li>
                        <a href="javascript:;">子選項4</a>
                    </li>
                  </ul>
                </div>
            </li>
...

CSS

*{
    margin: 0px;
    padding: 0px;
}

ul,li {
    list-style: none;
}

a {
    color: yellow;
    text-decoration: none;
}

#header {
    width: 100%;
    height: 250px;
    background-color: #dc143c;
}

.empty {
    width: 100%;
    height: 200px;
}

.nav {
    width: 100%;
    height: 50px;
    background-color: #000;
    padding-left: 30px;
}

.nav>ul>li {
    float: left;
    position: relative;
}

.nav>ul>li>a {
    width: 57px;
    height: 35px;
    padding-top: 15px;
    padding-left: 13px;
    display: block;
}

.nav>ul>li>a:hover {
    background-color: #e6e6fa;
    color: #dc143c;
}

.child {
    position: absolute;
    width: 280px;
    height: 50px;
    top: -50px;
}

.child li {
    float: left;
}

.child li>a{
    background-color: #000;
    width: 63px;
    height: 35px;
    padding-top: 15px;
    padding-left: 7px;
    display: block;
}

.child li>a:hover{
    background-color: #e6e6fa;
    color: #dc143c;
}

.none {
    display: none;
}

JavaScript

$(function(){
    $('.nav>ul>li').hover(function(){
        $(this).find('.child').removeClass('none');
    },function(){
         $(this).find('.child').addClass('none');
    });
});