javascript - 在悬停和单击时创建下拉导航

Question

我有一个使用 CSS 和 jQuery 创建的下拉菜单，我试图在悬停 和点击 时制作下拉菜单。

默认情况下，我希望在单击时显示下拉列表，但是给定类 .dropdown-hover 我希望它在鼠标悬停时显示。

这是我目前拥有的 JSFiddle: http://jsfiddle.net/dR8hL/1/

现在，无论将什么类应用于下拉菜单，它都会在悬停时显示，我不确定如何解决这个问题。

HTML

<div class="dropdown dropdown-hover">Dropdown on hover                
    <ul class="dropdown-menu">
        <li><a href="#">Profile</a></li>
        <li><a href="#">Settings</a></li>
        <li><a href="#">Log out</a></li>
    </ul>
</div>

<div class="dropdown">Dropdown on click                
    <ul class="dropdown-menu">
        <li><a href="#">Profile</a></li>
        <li><a href="#">Settings</a></li>
        <li><a href="#">Log out</a></li>
    </ul>
</div>

CSS

.dropdown {
    cursor: pointer;
    outline: none;
    position: relative;
    width: auto;
}

.dropdown .dropdown-menu {
    background-color: #fff;
    border: 1px solid #eee;
    border-radius: inherit;
    font-weight: inherit;
    left: 0;
    margin-left: 0px;
    opacity: 0;
    pointer-events: none;
    position: absolute;
    right: 0;
    text-transform: none;
    width: 200px;
    z-index: 99999;

    -webkit-transition: all 0.3s ease-in;
    -moz-transition: all 0.3s ease-in;
    -ms-transition: all 0.3s ease-in;
    -o-transition: all 0.3s ease-in;
    transition: all 0.3s ease-in;
}

.dropdown .dropdown-menu a { text-decoration: none; }

.dropdown .dropdown-menu p { 
    margin: 0; 
    padding: 10px 15px; 
}

.dropdown .dropdown-menu span { line-height: inherit; }

.dropdown ul.dropdown-menu { list-style-type: none; }

.dropdown .dropdown-menu li {
    display: block;
    padding: 5px 10px;
}

.dropdown .dropdown-menu li:hover { background-color: #f3f8f8; }

.dropdown.dropdown-active .dropdown-menu {
    opacity: 1;
    pointer-events: auto;
}

jQuery

function DropDown(el) {
    this.dd = el;
    this.initEvents();
}

DropDown.prototype = {
    initEvents: function () {
        var obj = this;

        // Determine if dropdown is on hover or on click
        if ($(".dropdown").hasClass("dropdown-hover")) {
            // Toggle .dropdown-active on hover
            $(".dropdown").mouseenter(function (event) {
                $(this).addClass("dropdown-active");
                event.stopPropagation();
            });

            $(".dropdown-menu").mouseleave(function () {
                $(".dropdown").removeClass("dropdown-active");
            });
        } else {
            // Toggle .dropdown-active on click
            obj.dd.on('click', function (event) {
                $(this).toggleClass('dropdown-active');
                event.stopPropagation();
            });
        }
    }
}

$(function () {
    var dd = new DropDown($('.dropdown'));

    $(document).click(function () {

        // Remove class from all dropdowns
        $('.dropdown').removeClass('dropdown-active');
    });
});

Answer 1

你能不能只针对 .dropdown-hover 类。你不应该需要 if 语句

        $(".dropdown-hover").mouseenter(function (event) {
            event.stopPropagation();
            $(this).addClass("dropdown-active");                
        });
        $(".dropdown-hover").mouseleave(function () {
            $(".dropdown").removeClass("dropdown-active");
        });

        // Toggle .dropdown-active on click
        obj.dd.on('click', function (event) {
            event.stopPropagation();
            $(this).toggleClass('dropdown-active');                
        });

已更新 JSFiddle http://jsfiddle.net/47mSS/