Question

我制作了一个下拉菜单，但它无法正常工作。请参阅小提琴或代码：https://jsfiddle.net/9u6fc7wp/

＆＃13;

$(document).ready(function() {
  $(function() {
    $(".links>li>a:not(.sub-menu a)").mouseenter(function() {
      $(".sub-menu-bg").addClass("menu-bg-up");

      setTimeout(function() {
        $(".sub-menu").fadeIn();
      }, 700);
    });
    $(".sub-menu-bg").mouseleave(function() {
      $(".sub-menu").fadeOut();
      setTimeout(function() {
        $(".sub-menu-bg").removeClass("menu-bg-up");
      }, 500);
    });
  }());
});

＆＃13;

#wrapper {
  height: 300px;
}
footer {
  background: white;
  color: #8a8a8a;
  font-family: TWcenMTregular;
  font-size: 1em;
  text-transform: uppercase;
  padding: 1vh 0;
  position: relative;
  z-index: 9100;
  width: 100%;
}
footer .links {
  text-align: center;
  list-style: none;
}
footer .links>li {
  float: left;
  width: 24%;
  position: relative;
}
footer .links li::after {
  content: ' | ';
  float: right;
}
footer .links li:last-child::after {
  content: '';
}
footer .links li a {
  color: #8a8a8a;
}
footer .links li:hover > a {
  color: #9ebe2d;
}
footer .links li:hover .sub-menu li:first-child a {
  color: #9ebe2d;
}
footer .sub-menu {
  position: absolute;
  bottom: 100%;
  left: initial;
  padding: 0px 0;
  margin: 0!important;
  font-family: TWcenMTregular;
  font-size: 1em;
  width: 100%;
  height: 150px;
  display: none;
}
footer .sub-menu li {
  text-align: center;
}
footer .sub-menu li:first-child {
  font-family: prismRegular;
  padding: 0 0 10px 0;
}
footer .sub-menu li::after {
  content: '';
  margin: 0;
}
footer .sub-menu li a {
  color: #8a8a8a;
}
footer .sub-menu li a:hover {
  color: #9ebe2d;
}
footer .sub-menu-bg {
  background: rgba(255, 255, 255, 0.8);
  position: absolute;
  bottom: 100%;
  left: initial;
  z-index: -5;
  width: 100%;
  display: block;
  transition: 0.7s;
  -webkit-transition: 0.7s;
  -moz-transition: 0.7s;
  -o-transition: 0.7s;
  -ms-transition: 0.7s;
  height: 0;
}
.menu-bg-up {
  height: 165px !important;
}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<footer>
  <ul class="links">
    <li><a href="#">link1</a>
      <ul class="sub-menu">
        <li><a href="#">link1</a>
        </li>
        <li><a href="#">link2</a>
        </li>
        <li><a href="#">link3</a>
        </li>
        <li><a href="#">link4</a>
        </li>
      </ul>
    </li>
    <li><a href="#">link2</a>
      <ul class="sub-menu">
        <li><a href="#">link1</a>
        </li>
        <li><a href="#">link2</a>
        </li>
        <li><a href="#">link3</a>
        </li>
        <li><a href="#">link4</a>
        </li>
      </ul>
    </li>
    <li><a href="#">link3</a>
    </li>
    <li><a href="#">link4</a>
    </li>
  </ul>
  <div class="sub-menu-bg"></div>
</footer>

＆＃13;

如果慢慢移动鼠标，它可以正常工作。我使用了超时功能，使子菜单链接出现在后面。如果将光标移动到其中一个链接并立即移动到将显示链接的空白处。当光标与链接接触时，下拉菜单消失。它必须仅在光标离开页脚时消失。对我来说，似乎选择器不能正常工作，而这应该解决问题。我只想在第一个.links>li

的孩子上使用mouseenter

如果只能用CSS完成，请告诉我如何操作。我尽我所能。我希望我能清楚地解释这个问题并随意提问。

提前致谢。

Answer 1

您可以在CSS中完成所有操作。我在下面给出了一个例子;

https://jsfiddle.net/9u6fc7wp/1/

.links {
  position: relative;
  width: 24%;
}
.links > a::after {
  content: "|";
  float: right;
}
.sub-menu {
  visibility: hidden;
  /* hides sub-menu */
  opacity: 0;
  position: absolute;
  top: -172px;
  left: 0;
  width: 100%;
  transform: translateY(2em);
  z-index: -1;
  transition: all 0.3s ease-in-out 0s, visibility 0s linear 0.3s, z-index 0s linear 0.01s;
}
.links:hover .sub-menu {
  visibility: visible;
  /* shows sub-menu */
  opacity: 1;
  z-index: 1;
  transform: translateY(0%);
  transition-delay: 0s, 0s, 0.3s;
  /* this removes the transition delay so the menu will be visible while the other styles transition */
}
/* presentational */

body {
  padding: 2%;
  font: 18px/1.4 sans-serif;
}
footer {
  position: relative;
  top: 200px;
}
footer a {
  color: #8a8a8a;
  display: block;
  padding: 0.5em 0px;
  text-decoration: none;
}
footer a:hover {
  color: #9ebe2d;
}
footer ul,
footer ul li {
  list-style-type: none;
  padding: 0;
  margin: 0;
}
footer > ul {
  background: white;
  text-align: center;
}
footer > ul > li {
  display: inline-block;
}
footer > ul > li:first-child {
  border-left: none;
}
.sub-menu {
  background: white;
}

<div id="wrapper"></div>
<footer>
  <ul>
    <li class="links"><a href="#">link1</a>
      <ul class="sub-menu">
        <li><a href="#">link1</a>
        </li>
        <li><a href="#">link2</a>
        </li>
        <li><a href="#">link3</a>
        </li>
        <li><a href="#">link4</a>
        </li>
      </ul>
    </li>
    <li class="links"><a href="#">link2</a>
      <ul class="sub-menu">
        <li><a href="#">link1</a>
        </li>
        <li><a href="#">link2</a>
        </li>
        <li><a href="#">link3</a>
        </li>
        <li><a href="#">link4</a>
        </li>
      </ul>
    </li>
    <li class="links"><a href="#">link3</a>
    </li>
    <li class="links"><a href="#">link4</a>
    </li>
  </ul>
  <div class="sub-menu-bg"></div>
</footer>

使用下拉菜单

1 个答案: