【发布时间】：2018-08-12 00:41:30
【问题描述】：
这几乎可以按预期工作，单击屏幕时下拉菜单会关闭，但在打开新下拉菜单时它们会保持打开状态。我希望它在打开新下拉菜单时也关闭打开的下拉菜单。为了使它做到这一点，我必须在脚本中进行哪些更改？提前谢谢你。
/* When the user clicks on the button, toggle between hiding and showing the dropdown content */
function myFunction(event) {
event.stopPropagation();
document.getElementById("myDropdown").classList.toggle("show");
}
function myFunction2(event) {
event.stopPropagation();
document.getElementById("myDropdown2").classList.toggle("show");
}
function myFunction3(event) {
event.stopPropagation();
document.getElementById("myDropdown3").classList.toggle("show");
}
// Close the dropdown menu if the user clicks outside of it
window.onclick = function(event) {
document.getElementById("myDropdown").classList.remove("show");
document.getElementById("myDropdown2").classList.remove("show");
document.getElementById("myDropdown3").classList.remove("show");
}/* Dropdown Button */
.dropbtn {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
/* Dropdown button on hover & focus */
.dropbtn:hover,
.dropbtn:focus {
background-color: #3e8e41;
}
/* The container <div> - needed to position the dropdown content */
.dropdown {
position: relative;
display: inline-block;
}
/* Dropdown Content (Hidden by Default) */
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
}
/* Links inside the dropdown */
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
/* Change color of dropdown links on hover */
.dropdown-content a:hover {
background-color: #f1f1f1
}
/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */
.show {
display: block;
}
/* Dropdown Button */
.dropbtn2 {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
/* Dropdown button on hover & focus */
.dropbtn2:hover,
.dropbtn2:focus {
background-color: #3e8e41;
}
/* The container <div> - needed to position the dropdown content */
.dropdown2 {
position: relative;
display: inline-block;
}
/* Dropdown Content (Hidden by Default) */
.dropdown-content2 {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
}
/* Links inside the dropdown */
.dropdown-content2 a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
/* Change color of dropdown links on hover */
.dropdown-content2 a:hover {
background-color: #f1f1f1
}
/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */
.show {
display: block;
}
/* Dropdown Button */
.dropbtn3 {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor: pointer;
}
/* Dropdown button on hover & focus */
.dropbtn3:hover,
.dropbtn3:focus {
background-color: #3e8e41;
}
/* The container <div> - needed to position the dropdown content */
.dropdown3 {
position: relative;
display: inline-block;
}
/* Dropdown Content (Hidden by Default) */
.dropdown-content3 {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
}
/* Links inside the dropdown */
.dropdown-content3 a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
}
/* Change color of dropdown links on hover */
.dropdown-content3 a:hover {
background-color: #f1f1f1
}
/* Show the dropdown menu (use JS to add this class to the .dropdown-content container when the user clicks on the dropdown button) */
.show {
display: block;
}<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js">
</script>
<table>
<tr>
<td>
<div class="dropdown">
<button onclick="myFunction(event)" class="dropbtn">Dropdown</button>
<div id="myDropdown" class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
</td>
<td>
<div class="dropdown2">
<button onclick="myFunction2(event)" class="dropbtn2">Dropdown2</button>
<div id="myDropdown2" class="dropdown-content2">
<a href="#">Link 4</a>
<a href="#">Link 5</a>
<a href="#">Link 6</a>
</div>
</div>
</td>
<td>
<div class="dropdown3">
<button onclick="myFunction3(event)" class="dropbtn3">Dropdown3</button>
<div id="myDropdown3" class="dropdown-content3">
<a href="#">Link 7</a>
<a href="#">Link 8</a>
<a href="#">Link 9</a>
</div>
</div>
</td>
</tr>
</table>
</body>
</html>【问题讨论】：
标签： javascript jquery drop-down-menu navigation