我改写了一个示例,发现here有点像“真实”菜单,因为它应该在用户单击时折叠。

我喜欢这样一个事实,即菜单的所有视觉方面都在CSS中处理,而JavaScript仅在处理用户选择选项时处理所需的操作时起作用。我觉得这是最适合我的特定应用程序的方法。

但是,我发现分配给每个链接的onclick事件在收起菜单时被删除(或忽略)。

我发布了2个版本,其中一个版本的工作方式是当用户选择一个选项时,将触发所需的onclick事件,另一个版本可以很好地放置菜单,但也可以吞下onclick事件。我正在寻找一种解决方案,它将两个结果合并到一个工作菜单中,这也满足了单击后将其放开的要求。

编辑刚刚注意到我已注释掉一些额外的代码(这是在找出仅css解决方案之前的尝试。我正在调用mouseleave,没有任何效果。

这两个版本之间的唯一区别是添加了CSS子句:

#menuwrapper ul:active{
    display:none;
}

可以“运行”但不会折叠菜单的版本

   var display = document.getElementById("display");
   $(document).ready(function() {
     $('li.menu_clickable').click(function() {
       if (this.children.length === 1) {
         //$(this).trigger('mouseleave');
         display.innerHTML = 'you clicked ' + this.innerHTML;
       }
     });
   });
/* Define the body style */

body {
  font-family: Arial;
  font-size: 12px;
}
#maindiv {
  position: absolute;
  left: 200px;
  top: 0px;
}
/* We remove the margin, padding, and list style of UL and LI components */

#menuwrapper ul,
#menuwrapper ul li {
  margin: 0;
  padding: 0;
  list-style: none;
}
/* We apply background color and border bottom white and width to 150px */

#menuwrapper ul li {
  background-color: #7f95db;
  border-bottom: solid 1px white;
  width: 150px;
  cursor: pointer;
}
/* We apply the background hover color when user hover the mouse over of the li component */

#menuwrapper ul li:hover {
  background-color: #6679e9;
  position: relative;
  z-index: 100;
}
/* We apply the link style */

#menuwrapper ul li a {
  padding: 5px 15px;
  color: #ffffff;
  display: inline-block;
  text-decoration: none;
}
/**** SECOND LEVEL MENU ****/

/* We make the position to absolute for flyout menu and hidden the ul until the user hover the parent li item */

#menuwrapper ul li ul {
  position: absolute;
  display: none;
}
/* When user has hovered the li item, we show the ul list by applying display:block, note: 150px is the individual menu width.  */

#menuwrapper ul li:hover ul {
  left: 150px;
  top: 0px;
  display: block;
}
/* we apply different background color to 2nd level menu items*/

#menuwrapper ul li ul li {
  background-color: #cae25a;
}
/* We change the background color for the level 2 submenu when hovering the menu */

#menuwrapper ul li:hover ul li:hover {
  background-color: #b1b536;
}
/* We style the color of level 2 links */

#menuwrapper ul li ul li a {
  color: #454444;
  display: inline-block;
  width: 120px;
}
/**** THIRD LEVEL MENU ****/

/* We need to hide the 3rd menu, when hovering the first level menu */

#menuwrapper ul li:hover ul li ul {
  position: absolute;
  display: none;
}
/* We show the third level menu only when they hover the second level menu parent */

#menuwrapper ul li:hover ul li:hover ul {
  display: block;
  left: 150px;
  top: 0;
}
/* We change the background color for the level 3 submenu*/

#menuwrapper ul li:hover ul li:hover ul li {
  background: #86d3fa;
}
/* We change the background color for the level 3 submenu when hovering the menu */

#menuwrapper ul li:hover ul li:hover ul li:hover {
  background: #358ebc;
}
/* We change the level 3 link color */

#menuwrapper ul li:hover ul li:hover ul li a {
  color: #ffffff;
}
/* Hide the menu when a link is clicked on */

/*
#menuwrapper ul:active{
    display:none;
}
*/

/* Clear float */

.clear {
  clear: both;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="menuwrapper">
  <ul>
    <li class="menu_clickable"><a href="#">Home</a>
    </li>
    <li class="menu_clickable"><a href="#">Products</a>
      <ul>
        <li class="menu_clickable"><a href="#">Product 1</a>
          <ul>
            <li class="menu_clickable"><a href="#">Sub Product 1</a>
            </li>
            <li class="menu_clickable"><a href="#">Sub Product 2</a>
            </li>
            <li class="menu_clickable"><a href="#">Sub Product 3</a>
            </li>
          </ul>
        </li>
        <li class="menu_clickable"><a href="#">Product 2</a>
        </li>
        <li class="menu_clickable"><a href="#">Product 3</a>
        </li>
      </ul>
    </li>
    <li><a href="#">About Us</a>
      <ul>
        <li class="menu_clickable"><a href="#">Faqs</a>
        </li>
        <li class="menu_clickable"><a href="#">Contact Us</a>
        </li>
        <li class="menu_clickable"><a href="#">Where are we?</a>
        </li>
      </ul>
    </li>
    <li class="menu_clickable"><a href="#">Help</a>
  </ul>
</div>

<div id="maindiv">
  <div>
    <label id="display">click an option</label>
  </div>
  <div>
    <button onclick="alert('hey!');">
      some button
    </button>under the menu
  </div>
  <div>
    <input value="some input box">under the menu
  </div>
</div>


折叠菜单的版本,但不触发onclick

   var display = document.getElementById("display");
   $(document).ready(function() {
     $('li.menu_clickable').click(function() {
       if (this.children.length === 1) {
         //$(this).trigger('mouseleave');
         display.innerHTML = 'you clicked ' + this.innerHTML;
       }
     });
   });
/* Define the body style */

body {
  font-family: Arial;
  font-size: 12px;
}
#maindiv {
  position: absolute;
  left: 200px;
  top: 0px;
}
/* We remove the margin, padding, and list style of UL and LI components */

#menuwrapper ul,
#menuwrapper ul li {
  margin: 0;
  padding: 0;
  list-style: none;
}
/* We apply background color and border bottom white and width to 150px */

#menuwrapper ul li {
  background-color: #7f95db;
  border-bottom: solid 1px white;
  width: 150px;
  cursor: pointer;
}
/* We apply the background hover color when user hover the mouse over of the li component */

#menuwrapper ul li:hover {
  background-color: #6679e9;
  position: relative;
  z-index: 100;
}
/* We apply the link style */

#menuwrapper ul li a {
  padding: 5px 15px;
  color: #ffffff;
  display: inline-block;
  text-decoration: none;
}
/**** SECOND LEVEL MENU ****/

/* We make the position to absolute for flyout menu and hidden the ul until the user hover the parent li item */

#menuwrapper ul li ul {
  position: absolute;
  display: none;
}
/* When user has hovered the li item, we show the ul list by applying display:block, note: 150px is the individual menu width.  */

#menuwrapper ul li:hover ul {
  left: 150px;
  top: 0px;
  display: block;
}
/* we apply different background color to 2nd level menu items*/

#menuwrapper ul li ul li {
  background-color: #cae25a;
}
/* We change the background color for the level 2 submenu when hovering the menu */

#menuwrapper ul li:hover ul li:hover {
  background-color: #b1b536;
}
/* We style the color of level 2 links */

#menuwrapper ul li ul li a {
  color: #454444;
  display: inline-block;
  width: 120px;
}
/**** THIRD LEVEL MENU ****/

/* We need to hide the 3rd menu, when hovering the first level menu */

#menuwrapper ul li:hover ul li ul {
  position: absolute;
  display: none;
}
/* We show the third level menu only when they hover the second level menu parent */

#menuwrapper ul li:hover ul li:hover ul {
  display: block;
  left: 150px;
  top: 0;
}
/* We change the background color for the level 3 submenu*/

#menuwrapper ul li:hover ul li:hover ul li {
  background: #86d3fa;
}
/* We change the background color for the level 3 submenu when hovering the menu */

#menuwrapper ul li:hover ul li:hover ul li:hover {
  background: #358ebc;
}
/* We change the level 3 link color */

#menuwrapper ul li:hover ul li:hover ul li a {
  color: #ffffff;
}
/* Hide the menu when a link is clicked on */


#menuwrapper ul:active{
    display:none;
}


/* Clear float */

.clear {
  clear: both;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="menuwrapper">
  <ul>
    <li class="menu_clickable"><a href="#">Home</a>
    </li>
    <li class="menu_clickable"><a href="#">Products</a>
      <ul>
        <li class="menu_clickable"><a href="#">Product 1</a>
          <ul>
            <li class="menu_clickable"><a href="#">Sub Product 1</a>
            </li>
            <li class="menu_clickable"><a href="#">Sub Product 2</a>
            </li>
            <li class="menu_clickable"><a href="#">Sub Product 3</a>
            </li>
          </ul>
        </li>
        <li class="menu_clickable"><a href="#">Product 2</a>
        </li>
        <li class="menu_clickable"><a href="#">Product 3</a>
        </li>
      </ul>
    </li>
    <li><a href="#">About Us</a>
      <ul>
        <li class="menu_clickable"><a href="#">Faqs</a>
        </li>
        <li class="menu_clickable"><a href="#">Contact Us</a>
        </li>
        <li class="menu_clickable"><a href="#">Where are we?</a>
        </li>
      </ul>
    </li>
    <li class="menu_clickable"><a href="#">Help</a>
  </ul>
</div>

<div id="maindiv">
  <div>
    <label id="display">click an option</label>
  </div>
  <div>
    <button onclick="alert('hey!');">
      some button
    </button>under the menu
  </div>
  <div>
    <input value="some input box">under the menu
  </div>
</div>

最佳答案

您可以尝试使用mousedown而不是单击

   var display = document.getElementById("display");
   $(document).ready(function() {
     $('li.menu_clickable').mousedown(function() {
       if (this.children.length === 1) {
         //$(this).trigger('mouseleave');
         display.innerHTML = 'you clicked ' + this.innerHTML;
       }
     });
   });
/* Define the body style */

body {
  font-family: Arial;
  font-size: 12px;
}
#maindiv {
  position: absolute;
  left: 200px;
  top: 0px;
}
/* We remove the margin, padding, and list style of UL and LI components */

#menuwrapper ul,
#menuwrapper ul li {
  margin: 0;
  padding: 0;
  list-style: none;
}
/* We apply background color and border bottom white and width to 150px */

#menuwrapper ul li {
  background-color: #7f95db;
  border-bottom: solid 1px white;
  width: 150px;
  cursor: pointer;
}
/* We apply the background hover color when user hover the mouse over of the li component */

#menuwrapper ul li:hover {
  background-color: #6679e9;
  position: relative;
  z-index: 100;
}
/* We apply the link style */

#menuwrapper ul li a {
  padding: 5px 15px;
  color: #ffffff;
  display: inline-block;
  text-decoration: none;
}
/**** SECOND LEVEL MENU ****/

/* We make the position to absolute for flyout menu and hidden the ul until the user hover the parent li item */

#menuwrapper ul li ul {
  position: absolute;
  display: none;
}
/* When user has hovered the li item, we show the ul list by applying display:block, note: 150px is the individual menu width.  */

#menuwrapper ul li:hover ul {
  left: 150px;
  top: 0px;
  display: block;
}
/* we apply different background color to 2nd level menu items*/

#menuwrapper ul li ul li {
  background-color: #cae25a;
}
/* We change the background color for the level 2 submenu when hovering the menu */

#menuwrapper ul li:hover ul li:hover {
  background-color: #b1b536;
}
/* We style the color of level 2 links */

#menuwrapper ul li ul li a {
  color: #454444;
  display: inline-block;
  width: 120px;
}
/**** THIRD LEVEL MENU ****/

/* We need to hide the 3rd menu, when hovering the first level menu */

#menuwrapper ul li:hover ul li ul {
  position: absolute;
  display: none;
}
/* We show the third level menu only when they hover the second level menu parent */

#menuwrapper ul li:hover ul li:hover ul {
  display: block;
  left: 150px;
  top: 0;
}
/* We change the background color for the level 3 submenu*/

#menuwrapper ul li:hover ul li:hover ul li {
  background: #86d3fa;
}
/* We change the background color for the level 3 submenu when hovering the menu */

#menuwrapper ul li:hover ul li:hover ul li:hover {
  background: #358ebc;
}
/* We change the level 3 link color */

#menuwrapper ul li:hover ul li:hover ul li a {
  color: #ffffff;
}
/* Hide the menu when a link is clicked on */


#menuwrapper ul:active{
    display:none;

}


/* Clear float */

.clear {
  clear: both;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="menuwrapper">
  <ul>
    <li class="menu_clickable"><a href="#">Home</a>
    </li>
    <li class="menu_clickable"><a href="#">Products</a>
      <ul>
        <li class="menu_clickable"><a href="#">Product 1</a>
          <ul>
            <li class="menu_clickable"><a href="#">Sub Product 1</a>
            </li>
            <li class="menu_clickable"><a href="#">Sub Product 2</a>
            </li>
            <li class="menu_clickable"><a href="#">Sub Product 3</a>
            </li>
          </ul>
        </li>
        <li class="menu_clickable"><a href="#">Product 2</a>
        </li>
        <li class="menu_clickable"><a href="#">Product 3</a>
        </li>
      </ul>
    </li>
    <li><a href="#">About Us</a>
      <ul>
        <li class="menu_clickable"><a href="#">Faqs</a>
        </li>
        <li class="menu_clickable"><a href="#">Contact Us</a>
        </li>
        <li class="menu_clickable"><a href="#">Where are we?</a>
        </li>
      </ul>
    </li>
    <li class="menu_clickable"><a href="#">Help</a>
  </ul>
</div>

<div id="maindiv">
  <div>
    <label id="display">click an option</label>
  </div>
  <div>
    <button onclick="alert('hey!');">
      some button
    </button>under the menu
  </div>
  <div>
    <input value="some input box">under the menu
  </div>
</div>

10-05 20:16
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