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/**
* @preserve
* Project: Bootstrap Hover Dropdown
* Author: Cameron Spear
* Version: v2.2.1
* Contributors: Mattia Larentis
* Dependencies: Bootstrap's Dropdown plugin, jQuery
* Description: A simple plugin to enable Bootstrap dropdowns to active on hover and provide a nice user experience.
* License: MIT
* Homepage: 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()).add(this.parent().children('.dropdown-menu'));
return this.each(function () {
var $this = $(this),
$parent = $this.parent(),
defaults = {
delay: 500,
hoverDelay: 0,
instantlyCloseOthers: true
},
data = {
delay: $(this).data('delay'),
hoverDelay: $(this).data('hover-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, timeoutHover;
$parent.hover(function (event) {
// so a neighbor can't open the dropdown
if(!$parent.hasClass('show') && !$this.is(event.target)) {
// stop this event, stop executing any code
// in this callback but continue to propagate
return true;
}
openDropdown(event);
}, function () {
if($this.parents(".navbar").find(".navbar-toggler").is(":visible")) {
// If we're inside a navbar, don't do anything when the
// navbar is collapsed, as it makes the navbar pretty unusable.
return;
}
// clear timer for hover event
window.clearTimeout(timeoutHover)
timeout = window.setTimeout(function () {
$this.attr('aria-expanded', 'false');
$parent.removeClass('show');
$parent.children('.dropdown-menu').removeClass('show');
$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('show') && !$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 = $(this);
var subTimeout;
if($this.parents(".navbar").find(".navbar-toggler").is(":visible")) {
// If we're inside a navbar, don't do anything when the
// navbar is collapsed, as it makes the navbar pretty unusable.
return;
}
$this.hover(function () {
window.clearTimeout(subTimeout);
$this.addClass('show');
$this.children('.dropdown-menu').addClass('show');
// always close submenu siblings instantly
$this.siblings().children('.dropdown-menu').removeClass('show');
}, function () {
var $submenu = $this.children('.dropdown-menu'),
// $parent = $this.parent('dropdown-submenu');
subTimeout = window.setTimeout(function () {
$submenu.removeClass('show');
$this.removeClass('show');
}, settings.delay);
});
});
function openDropdown(event) {
if($this.parents(".navbar").find(".navbar-toggler").is(":visible")) {
// If we're inside a navbar, don't do anything when the
// navbar is collapsed, as it makes the navbar pretty unusable.
return;
}
// clear dropdown timeout here so it doesnt close before it should
window.clearTimeout(timeout);
// restart hover timer
window.clearTimeout(timeoutHover);
// delay for hover event.
timeoutHover = window.setTimeout(function () {
$allDropdowns.find(':focus').blur();
if(settings.instantlyCloseOthers === true) {
$allDropdowns.removeClass('show');
// $allDropdowns.children('.dropdown-menu').removeClass('show');
}
// clear timer for hover event
window.clearTimeout(timeoutHover);
$this.attr('aria-expanded', 'true');
$parent.addClass('show');
$parent.children('.dropdown-menu').addClass('show');
$this.trigger(showEvent);
}, settings.hoverDelay);
}
});
};
$(document).ready(function () {
// apply dropdownHover to all elements with the data-hover="dropdown" attribute
$('[data-hover="dropdown"]').dropdownHover();
});
})(jQuery, window);