javascript - 在下拉菜单中显示图像

标签 javascript jquery html css

我想在下拉菜单中的列表项上悬停时显示图像，我不能完全按照我想要的方式单独使用 css，我想在悬停时在右侧显示图像左边对应的名字。

由于使用 css 时必须具有父子关系，所以到目前为止我编写的代码不起作用，我没有经验，所以也许解决方案真的很简单，如果是这样的话请原谅。

html:

<body>
<div class="menu-wrap">
    <nav class="menu">
        <ul class="clearfix">
            <li class="current-item"><a href="#">Home</a>
            </li>
            <li><a href="#">Collaboratori</a>                
                <div class="sub-menu-collab">
                    <div>
                         <ul class="listanomi">
                            <li><a href="#">Paolo</a></li>
                            <li><a href="#">Luca</a></li>
                            <li><a href="#">Anna</a></li>
                            <li><a href="#">Mara</a></li>
                        </ul>
                        <img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Paolo">
                        <img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Luca">              
                        <img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Anna">
                        <img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Mara">
                    </div>
                </div>
            </li>
    </nav>
</div>

</body>

CSS:

.clearfix:after {
    display:block;
    clear:both;
}

/*----- Menu Outline -----*/
.menu-wrap {
    width:100%;
    box-shadow:0px 1px 3px rgba(0,0,0,0.2);
    background:#3e3436;
}

.menu {
    width:1000px;
    margin:0px auto;
}

.menuimage {
    float: right;
    clear: none;
    padding: 40px;
    opacity: 1;
    position: relative;
    transition:all linear 0.15s;
}

.menu > .listanomi > li:hover .menuimage{
    opacity: 1;
}

.listanomi {
    float: left;
}

.menu li {
    margin:0px;
    list-style:none;
    font-family: 'Playfair Display', serif;
    text-transform: uppercase;
    text-decoration: none;
}

.menu a {
    transition:all linear 0.15s;
    color:#a1a1a1;
}

.menu li:hover > a, .menu .current-item > a {
    text-decoration:none;
    color:#e8e8e8;
}

.menu .arrow {
    font-size:11px;
    line-height:0%;
}

/*----- Top Level -----*/
.menu > ul > li {
    float:left;
    display:inline-block;
    position:relative;
    font-size:16px;
    text-decoration: none;
}

.menu > ul > li > a {
    padding:10px 40px;
    display:inline-block;
    text-shadow:0px 1px 0px rgba(0,0,0,0.4);
    text-decoration: none;
}

.menu > ul > li:hover > a, .menu > ul > .current-item > a {
    background:#2e2728;
    text-decoration: none;
}

/*----- Bottom Level -----*/
.menu li:hover .sub-menu-collab, .menu li:hover .sub-menu-mat, .menu li:hover .sub-menu-arte {
    z-index:1;
    opacity:1;
}

.sub-menu-collab {
    width:150%;
    padding:5px 0px;
    position:absolute;
    top:100%;
    left:0%;
    z-index:-1;
    opacity:0;
    transition:opacity linear 0.15s;
    box-shadow:0px 2px 3px rgba(0,0,0,0.2);
    background:#2e2728;
    text-decoration: none;
}


.sub-menu-collab li, .sub-menu-mat li, .sub-menu-arte li {
    display:block;
    font-size:16px;
    text-decoration: none;
}

.sub-menu-collab li a, .sub-menu-mat li a, .sub-menu-arte li a {
    padding:10px 30px;
    display:block;
    text-decoration: none;
}

.sub-menu-collab li a:hover, .sub-menu-mat li a:hover, .sub-menu-arte li a:hover {
    background:#3e3436;
    text-decoration: none;
}

.current-item a {
    background:#3e3436;
}

jsfiddle 上的代码:code

谢谢!

最佳答案

你犯了两个错误:

  1. 在css中使用父子关系时，需要指向子img在本例中为父元素。

<li> <a href="#">Anna</a> <img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Anna"> </li>

  1. CSS 选择应该是

    .menu .listanomi > li:hover .menuimage { opacity: 1; }

.listanomi不是 .menu 的直接子代.

注意:我还将 img float 更改为绝对到右上角。

这里的工作示例:

.clearfix:after {
  display: block;
  clear: both;
}
/*----- Menu Outline -----*/

.menu-wrap {
  width: 100%;
  box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.2);
  background: #3e3436;
}
.menu {
  width: 1000px;
  margin: 0px auto;
}
.menuimage {
  clear: none;
  padding: 40px;
  opacity: 0;
  position: absolute;
  top: 0;
  right: 0;
  transition: all linear 0.15s;
}
.menu .listanomi > li:hover .menuimage {
  opacity: 1;
}
.listanomi {
  float: left;
}
.menu li {
  margin: 0px;
  list-style: none;
  font-family: 'Playfair Display', serif;
  text-transform: uppercase;
  text-decoration: none;
}
.menu a {
  transition: all linear 0.15s;
  color: #a1a1a1;
}
.menu li:hover > a,
.menu .current-item > a {
  text-decoration: none;
  color: #e8e8e8;
}
.menu .arrow {
  font-size: 11px;
  line-height: 0%;
}
/*----- Top Level -----*/

.menu > ul > li {
  float: left;
  display: inline-block;
  position: relative;
  font-size: 16px;
  text-decoration: none;
}
.menu > ul > li > a {
  padding: 10px 40px;
  display: inline-block;
  text-shadow: 0px 1px 0px rgba(0, 0, 0, 0.4);
  text-decoration: none;
}
.menu > ul > li:hover > a,
.menu > ul > .current-item > a {
  background: #2e2728;
  text-decoration: none;
}
/*----- Bottom Level -----*/

.menu li:hover .sub-menu-collab,
.menu li:hover .sub-menu-mat,
.menu li:hover .sub-menu-arte {
  z-index: 1;
  opacity: 1;
}
.sub-menu-collab {
  width: 150%;
  padding: 5px 0px;
  position: absolute;
  top: 100%;
  left: 0%;
  z-index: -1;
  opacity: 0;
  transition: opacity linear 0.15s;
  box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.2);
  background: #2e2728;
  text-decoration: none;
}
.sub-menu-mat {
  width: 120%;
  padding: 5px 0px;
  position: absolute;
  top: 100%;
  left: 0%;
  z-index: -1;
  opacity: 0;
  transition: opacity linear 0.15s;
  box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.2);
  background: #2e2728;
  text-decoration: none;
}
.sub-menu-arte {
  width: 150%;
  padding: 5px 0px;
  position: absolute;
  top: 100%;
  left: -50%;
  z-index: -1;
  opacity: 0;
  transition: opacity linear 0.15s;
  box-shadow: 0px 2px 3px rgba(0, 0, 0, 0.2);
  background: #2e2728;
  text-decoration: none;
}
.sub-menu-collab li,
.sub-menu-mat li,
.sub-menu-arte li {
  display: block;
  font-size: 16px;
  text-decoration: none;
}
.sub-menu-collab li a,
.sub-menu-mat li a,
.sub-menu-arte li a {
  padding: 10px 30px;
  display: block;
  text-decoration: none;
}
.sub-menu-collab li a:hover,
.sub-menu-mat li a:hover,
.sub-menu-arte li a:hover {
  background: #3e3436;
  text-decoration: none;
}
.sub-menu-collab li a:visited,
.sub-menu-mat li a:visited,
.sub-menu-arte li a:visited {
  text-decoration: none;
  color: #989898;
}
.menu li a:visited {
  text-decoration: none;
  color: #999999;
}
.menu li a:active {
  text-decoration: none;
  color: #999999;
}
.current-item a {
  background: #3e3436;
}
<body>
  <div class="menu-wrap">
    <nav class="menu">
      <ul class="clearfix">
        <li class="current-item"><a href="#">Home</a>
        </li>
        <li><a href="#">Collaboratori</a>	
          <div class="sub-menu-collab">
            <div>
              <ul class="listanomi">
                <li><a href="#">Paolo</a><img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Paolo">
                </li>
                <li><a href="#">Luca</a><img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Luca">
                </li>
                <li><a href="#">Anna</a><img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Anna">
                </li>
                <li><a href="#">Mara</a><img class="menuimage" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSR6KryU6yZY04TXZ7qgzBYtX61idklEgJGxnee_MausSGZJQqvmRXEbvo" title="Mara">
                </li>
              </ul> 
            </div>
          </div>
        </li>
        <li><a href="#">Materie di Competenza</a>
          <ul class="sub-menu-mat">
            <li><a href="#">penale</a>
            </li>
            <li><a href="#">civile</a>
            </li>
            <li><a href="#">punto c</a>
            </li>
            <li><a href="#">punto d</a>
            </li>
          </ul>
        </li>
        <li><a href="#">Arte</a>
          <ul class="sub-menu-arte">
            <li><a href="#">mostre</a>
            </li>
            <li><a href="#">eventi</a>
            </li>
            <li><a href="#">punto c</a>
            </li>
            <li><a href="#">punto d</a>
            </li>
          </ul>
        </li>
        <li><a href="#">Contatti</a>
        </li>
      </ul>
    </nav>
  </div>

</body>

关于javascript - 在下拉菜单中显示图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33724648/

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