bootstrap-hover-dropdown.js
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/**
* Project: Bootstrap Hover Dropdown
* Author: Cameron Spear
* Contributors: Mattia Larentis
*
* Dependencies: Bootstrap's Dropdown plugin, jQuery
*
* A simple plugin to enable Bootstrap dropdowns to active on hover and provide a nice user experience.
*
* License: MIT
*
* http://cameronspear.com/blog/bootstrap-dropdown-on-hover-plugin/
*/
;(function ($, window, undefined) {
// outside the scope of the jQuery plugin to
// keep track of all dropdowns
var $allDropdowns = $();
// if instantlyCloseOthers is true, then it will instantly
// shut other nav items when a new one is hovered over
$.fn.dropdownHover = function (options) {
// don't do anything if touch is supported
// (plugin causes some issues on mobile)
if('ontouchstart' in document) return this; // don't want to affect chaining
// the element we really care about
// is the dropdown-toggle's parent
$allDropdowns = $allDropdowns.add(this.parent());
return this.each(function () {
var $this = $(this),
$parent = $this.parent(),
defaults = {
delay: 500,
instantlyCloseOthers: true
},
data = {
delay: $(this).data('delay'),
instantlyCloseOthers: $(this).data('close-others')
},
showEvent = 'show.bs.dropdown',
hideEvent = 'hide.bs.dropdown',
// shownEvent = 'shown.bs.dropdown',
// hiddenEvent = 'hidden.bs.dropdown',
settings = $.extend(true, {}, defaults, options, data),
timeout;
$parent.hover(function (event) {
// so a neighbor can't open the dropdown
if(!$parent.hasClass('open') && !$this.is(event.target)) {
// stop this event, stop executing any code
// in this callback but continue to propagate
return true;
}
openDropdown(event);
}, function () {
timeout = window.setTimeout(function () {
$parent.removeClass('open');
$this.trigger(hideEvent);
}, settings.delay);
});
// this helps with button groups!
$this.hover(function (event) {
// this helps prevent a double event from firing.
// see https://github.com/CWSpear/bootstrap-hover-dropdown/issues/55
if(!$parent.hasClass('open') && !$parent.is(event.target)) {
// stop this event, stop executing any code
// in this callback but continue to propagate
return true;
}
openDropdown(event);
});
// handle submenus
$parent.find('.dropdown-submenu').each(function (){
var $this = $(this);
var subTimeout;
$this.hover(function () {
window.clearTimeout(subTimeout);
$this.children('.dropdown-menu').show();
// always close submenu siblings instantly
$this.siblings().children('.dropdown-menu').hide();
}, function () {
var $submenu = $this.children('.dropdown-menu');
subTimeout = window.setTimeout(function () {
$submenu.hide();
}, settings.delay);
});
});
function openDropdown(event) {
$allDropdowns.find(':focus').blur();
if(settings.instantlyCloseOthers === true)
$allDropdowns.removeClass('open');
window.clearTimeout(timeout);
$parent.addClass('open');
$this.trigger(showEvent);
}
});
};
$(document).ready(function () {
// apply dropdownHover to all elements with the data-hover="dropdown" attribute
$('[data-hover="dropdown"]').dropdownHover();
});
})(jQuery, this);