[英]when second parent menu is clicked show its submenu and hide the submenu of previously clicked parent menu
I have a vertical menu with submenus and I want to show the submenu only if the parent was clicked ,showing only one submenu at a time. 我有一个带有子菜单的垂直菜单,我想仅在单击父级时显示该子菜单,一次仅显示一个子菜单。 But the thing is when other parent menu is clicked its submenu is shown BUT the previous submenu also is seen.
但问题是,当单击其他父菜单时,其子菜单显示出来,但也可以看到先前的子菜单。 How do i hide the previous submenu??
如何隐藏上一个子菜单? please help .
请帮忙 。 I am new to javascript.
我是javascript新手。 Here is my html-css-javascript code.
这是我的html-css-javascript代码。
<div class="menu">
<ul >
<li><a href="#" onclick= "Myfunction('cert')">Contacts</a>
<div style="display: none;" id="cert">
<ul >
<li >Submenu 1</li>
<li>submenu 2</li>
</ul>
</div>
</li>
<li><a href="#" onclick="Myfunction('defect')">About</a>
<div style="display: none;" id="defect">
<ul >
<li>menu 1</li>
<li>menu 2</li>
</ul>
</div>
</li>
</ul>
script 脚本
function Myfunction(obj) {
var ele=document.getElementById(obj).style;
if(ele.display=="none") {
ele.display="block";
} else { ele.display="none"; }
}
The easiest way will be using a global JavaScript variable, although it's not very elegant. 最简单的方法是使用全局JavaScript变量,尽管它不是很优雅。 Since you're not using any JavaScript libraries like eg jQuery everything else will turn into a pile of DOM-traversing spaghetti code.
由于您没有使用任何JavaScript库(例如jQuery),其他所有内容都将变成一堆DOM遍历的意大利面条代码。
var openEle = null;
function Myfunction(obj) {
var ele = document.getElementById(obj);
if (openEle != null) {
openEle.style.display = "none");
}
if (ele.style.display == "none") {
openEle = ele;
ele.style.display = "block";
} else {
ele.style.display = "none";
}
}
You can use this: 您可以使用此:
var lastid;
function Myfunction(obj) {
var ele = document.getElementById(obj).style;
var elemLastId = document.getElementById(lastid);
if (elemLastId != null) {
elemLastId.style.display = "none";
}
lastid = obj;
if (ele.display == "none") {
ele.display = "block";
} else {
ele.display = "none";
}
}
I made a new variable to remember the last ID. 我创建了一个新变量来记住上一个ID。 So you can call it and apply
display:none
to it. 因此,您可以调用它并对其应用
display:none
。
<a class="Label">Contacts</a>
<div>
<ul class="Submenu">
<li>Menu 1</li>
<li>Menu 2</li>
</ul>
</div>
<a class="Label">About</a>
<div>
<ul class="Submenu">
<li>Menu 1</li>
<li>Menu 2</li>
</ul>
</div>
And : 和:
(function($) {
$(function() {
$('.Label').on('click', function() {
$('.Submenu').hide();
$(this).next().find('.Submenu').show();
});
});
})(jQuery);
That's the jQuery approach. 那就是jQuery的方法。 I'll let another couragous guy do it with native js :D
我让另一个勇敢的家伙用本地js来完成它:D
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