我想有我的引导菜单自动下拉悬停,而不是必须点击菜单标题。我还想去掉菜单标题旁边的小箭头。
当前回答
我希望这能有所帮助。查看链接https://jsfiddle.net/awb7gfb1/
<nav>
<div id="menubar" class=" collapse navbar-collapse row">
<ul id="dropdownNavbar" class="nav navbar-nav">
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn"><span class="glyphicon glyphicon-time"></span>
Time Card
<span class="caret"></span></button>
<div class="dropdown-content">
<a id="showTimeCard" href="#">My Time Card</a>
<a href="#">Sub Menu 2</a>
<a href="#">Sub Menu 3</a>
<a href="#">Sub Menu 4</a>
<a href="#">Sub Menu 5</a>
</div>
</li>
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn"><span class="glyphicon glyphicon-stats"></span>
Project
<span class="caret"></span></button>
<div class="dropdown-content">
<a href="#">Sub Menu 1</a>
<a href="#">Sub Menu 2</a>
<a href="#">Sub Menu 3</a>
</div>
</li>
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn"><span class="glyphicon glyphicon-user"></span>
HR Links
<span class="caret"></span></button>
<div class="dropdown-content">
<a href="#">Sub Menu 1</a>
<a href="#">Sub Menu 2</a>
</div>
</li>
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn">
<span class="glyphicon glyphicon-screenshot"></span>
Leave Tracker
<span class="caret"></span></button>
<div class="dropdown-content">
<a href="#">Sub Menu 1</a>
<a href="#">Sub Menu 2</a>
<a href="#">Sub Menu 3</a>
<a href="#">Sub Menu 4</a>
</div>
</li>
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn">
<span class="glyphicon glyphicon-briefcase"></span>
Accounts
<span class="caret"></span></button>
<div class="dropdown-content">
<a href="#">Sub Menu 1</a>
<a href="#">Sub Menu 2</a>
<a href="#">Sub Menu 3</a>
<a href="#">Sub Menu 4</a>
<a href="#">Sub Menu 5</a>
</div>
</li>
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn">
<span class="glyphicon glyphicon-headphones"></span>
Service Desk
<span class="caret"></span></button>
<div class="dropdown-content">
<a href="#">Sub Menu 1</a>
<a href="#">Sub Menu 2</a>
<a href="#">Sub Menu 3</a>
<a href="#">Sub Menu 4</a>
</div>
</li>
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn">
<span class="glyphicon glyphicon-file"></span>
Reports
<span class="caret"></span></button>
<div class="dropdown-content">
<a href="#">Sub Menu 1</a>
<a href="#">Sub Menu 2</a>
<a href="#">Sub Menu 3</a>
<a href="#">Sub Menu 4</a>
<a href="#">Sub Menu 5</a>
</div>
</li>
<li class="dropdown">
<button type="button" class="btn btn-primary dropbtn">
<span class="glyphicon glyphicon-cog"></span>
Settings
<span class="caret"></span></button>
<div class="dropdown-content">
<a href="#">Sub Menu 1</a>
<a href="#">Sub Menu 2</a>
<a href="#">Sub Menu 3</a>
</div>
</li>
</ul>
</div>
</nav>
还有CSS
.dropdown {
float: left;
padding-right: 1px;
}
.dropbtn{
border: 0px;
height: 30px;
border-radius: 0px 10px;
}
li button, .dropbtn {
display: inline-block;
color: white;
text-align: center;
}
li button:hover, .dropdown:hover .dropbtn {
background-color: #12A5F4;
}
.dropbtn.active {
background: #12A5F4;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #e8f3f4;
min-width: 100%;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.1);
z-index: 10;
}
.navbar-header{
overflow: visible;
z-index: 1;
}
.dropdown-content a {
color: black;
padding: 5px 10px;
display: block;
text-align: left;
}
.dropdown-content a:hover {
background-color: #d8dee2
}
.dropdown:hover .dropdown-content {
display: block;
}
#menubar{
padding-top: 5px;
overflow: visible;
z-index: 10;
padding-left: 0px;
padding-right: 0px;
margin: 0px;
}
#dropdownNavbar{
margin: 0px;
}
.navbar-toggle{
background-color: #3382d5;
}
.navbar-toggle span{
background-color: white;
}
其他回答
只是想补充一下,如果你有多个下拉列表(就像我一样),你应该这样写:
ul.nav li.dropdown:hover > ul.dropdown-menu {
display: block;
}
它会正常工作的。
最好的方法是用鼠标悬停来触发Bootstrap的点击事件。这样,它应该仍然保持触摸设备友好。
$('.dropdown').hover(function(){
$('.dropdown-toggle', this).trigger('click');
});
引导版本4和5解决方案。(兼容)
这些都是使用mouseover和mouseleave事件和一些屏幕宽度检查的完整解决方案。这比纯CSS解决方案更好。
Bootstrap v5 -纯JS(用于webpack)
export class BootstrapOpenMenuHover {
/**
* Constructor.
*/
constructor() {
this.windowWidth = window.innerWidth;
this.mobileBreakPoint = 991; // Put your menu break point here, when it switches to a hamburger icon.
this.dropdownNavItems = document.querySelectorAll(".dropdown-toggle.nav-link");
this.dropdownMenuItems = document.querySelectorAll(".dropdown-menu");
this.setEventListeners();
}
/**
* Set all of our event listeners.
*/
setEventListeners() {
const _self = this;
// To be safe set the width once the dom is loaded.
window.addEventListener('load', function () {
_self.windowWidth = window.innerWidth;
});
// Keep track of the width in the event of a resize.
window.addEventListener('resize', function () {
_self.windowWidth = window.innerWidth;
});
// Bind our hover events.
if (_self.dropdownNavItems !== null) {
for (let i = 0; i < _self.dropdownNavItems.length; i++) {
// On mouse enter.
_self.dropdownNavItems[i].addEventListener('mouseenter', function () {
if (_self.windowWidth >= _self.mobileBreakPoint) {
this.classList.add('show');
this.ariaExpanded = true;
this.dataset.bsToggle = null;
// Update the .dropdown-menu
this.nextElementSibling.classList.add('show');
this.nextElementSibling.dataset.bsPopper = 'none';
}
});
// On mouse leave.
_self.dropdownNavItems[i].addEventListener('mouseleave', function () {
if (_self.windowWidth >= _self.mobileBreakPoint) {
this.classList.remove('show');
this.ariaExpanded = false;
this.dataset.bsToggle = 'dropdown';
// Update the .dropdown-menu
this.nextElementSibling.classList.remove('show');
this.nextElementSibling.dataset.bsPopper = null;
}
});
}
}
// Bind events to .dropdown-menu items.
if (_self.dropdownMenuItems !== null) {
for (let i = 0; i < _self.dropdownMenuItems.length; i++) {
// On mouse enter.
_self.dropdownMenuItems[i].addEventListener('mouseenter', function () {
if (_self.windowWidth >= _self.mobileBreakPoint) {
this.classList.add('show');
this.dataset.bsPopper = 'none';
// Update the .dropdown-toggle
this.previousElementSibling.classList.add('show');
this.previousElementSibling.ariaExpanded = true;
this.previousElementSibling.dataset.bsToggle = null;
}
});
// On mouse leave.
_self.dropdownMenuItems[i].addEventListener('mouseleave', function () {
if (_self.windowWidth >= _self.mobileBreakPoint) {
this.classList.remove('show');
this.dataset.bsPopper = null;
// Update the .dropdown-toggle
this.previousElementSibling.classList.remove('show');
this.previousElementSibling.ariaExpanded = false;
this.previousElementSibling.dataset.bsToggle = 'dropdown';
}
});
}
}
}
}
const bootstrapOpenMenuHover = new BootstrapOpenMenuHover();
Bootstrap v4方案
这将允许您遵循顶级导航链接。
这是基于桌面和移动平台设计的。随意更改BREAK_POINT变量以满足您的需要:D。
jQuery
var WINDOW_WIDTH;
var BREAK_POINT = 991;
(function ($) {
/** Set window width onload */
WINDOW_WIDTH = $(window).width(); // Returns width of browser viewport
/** Set window width if the browser is resized */
$(window).resize(function () {
WINDOW_WIDTH = $(window).width(); // Returns width of browser viewport
});
/** Dropdown menu on mouseenter */
$(".nav-item.dropdown").on('mouseenter', function () {
console.log("mouseenter");
if (WINDOW_WIDTH >= BREAK_POINT) {
// Open up the dropdown
$(this).addClass('show'); // add the class show to the li parent
$(this).children('.nav-link').removeAttr('data-toggle'); // remove the data-toggle attribute so we can click and follow link
$(this).children('.dropdown-menu').addClass('show'); // add the class show to the dropdown div sibling
}
});
/** Dropdown menu on mouseleave */
$(".nav-item.dropdown").on('mouseleave', function () {
console.log("mouseleave");
if (WINDOW_WIDTH >= BREAK_POINT) {
// Close the dropdown
$(this).removeClass('show'); // add the class show to the li parent
$(this).children('.nav-link').attr('data-toggle', 'dropdown'); // remove the data-toggle attribute so we can click and follow link
$(this).children('.dropdown-menu').removeClass('show'); // add the class show to the dropdown div sibling
}
});
});
CSS
@media(min-width: 768px) {
.dropdown-menu {
margin-top: 0; // fixes closing on slow mouse transition
}
}
使用以下代码在鼠标悬停时打开子菜单(仅适用于桌面):
$('ul.nav li.dropdown').hover(function () {
if ($(window).width() > 767) {
$(this).find('.dropdown-menu').show();
}
}, function () {
if ($(window).width() > 767) {
$(this).find('.dropdown-menu').hide().css('display','');
}
});
如果你想让第一关菜单是可点击的,甚至在手机上也可以添加这个:
$('.dropdown-toggle').click(function() {
if ($(this).next('.dropdown-menu').is(':visible')) {
window.location = $(this).attr('href');
}
});
子菜单(下拉菜单)将打开鼠标悬停在桌面上,点击/触摸移动和平板电脑。 一旦子菜单打开,第二次单击将让您打开链接。 多亏了if ($(window).width() > 767),子菜单将在移动设备上采用全屏宽度。
这招对我很管用:
.dropdown:hover .dropdown-menu {
display: block;
}