Bootstrap导航浮动：对不起作用？

Question

I've got this Bootstrap nav:

 (function($) { $.fn.menumaker = function(options) { var cssmenu = $(this), settings = $.extend({ title: "Menu", format: "dropdown", sticky: false }, options); return this.each(function() { cssmenu.prepend('<div id="menu-button">' + settings.title + '</div>'); $(this).find("#menu-button").on('click', function(){ $(this).toggleClass('menu-opened'); var mainmenu = $(this).next('ul'); if (mainmenu.hasClass('open')) { mainmenu.hide().removeClass('open'); } else { mainmenu.show().addClass('open'); if (settings.format === "dropdown") { mainmenu.find('ul').show(); } } }); cssmenu.find('li ul').parent().addClass('has-sub'); multiTg = function() { cssmenu.find(".has-sub").prepend('<span class="submenu-button"></span>'); cssmenu.find('.submenu-button').on('click', function() { $(this).toggleClass('submenu-opened'); if ($(this).siblings('ul').hasClass('open')) { $(this).siblings('ul').removeClass('open').hide(); } else { $(this).siblings('ul').addClass('open').show(); } }); }; if (settings.format === 'multitoggle') multiTg(); else cssmenu.addClass('dropdown'); if (settings.sticky === true) cssmenu.css('position', 'fixed'); resizeFix = function() { if ($( window ).width() > 768) { cssmenu.find('ul').show(); } if ($(window).width() <= 768) { cssmenu.find('ul').hide().removeClass('open'); } }; resizeFix(); return $(window).on('resize', resizeFix); }); }; })(jQuery); (function($){ $(document).ready(function(){ $(document).ready(function() { $("#cssmenu").menumaker({ title: "Menu", format: "multitoggle" }); $("#cssmenu").prepend("<div id='menu-line'></div>"); var foundActive = false, activeElement, linePosition = 0, menuLine = $("#cssmenu #menu-line"), lineWidth, defaultPosition, defaultWidth; $("#cssmenu > ul > li").each(function() { if ($(this).hasClass('active')) { activeElement = $(this); foundActive = true; } }); if (foundActive === false) { activeElement = $("#cssmenu > ul > li").first(); } defaultWidth = lineWidth = activeElement.width(); defaultPosition = linePosition = activeElement.position().left; menuLine.css("width", lineWidth); menuLine.css("left", linePosition); $("#cssmenu > ul > li").hover(function() { activeElement = $(this); lineWidth = activeElement.width(); linePosition = activeElement.position().left; menuLine.css("width", lineWidth); menuLine.css("left", linePosition); }, function() { menuLine.css("left", defaultPosition); menuLine.css("width", defaultWidth); }); }); }); })(jQuery); 

 @import url(http://fonts.googleapis.com/css?family=Open+Sans); #cssmenu, #cssmenu ul, #cssmenu ul li, #cssmenu ul li a, #cssmenu #menu-button { margin: 0; padding: 0; border: 0; list-style: none; line-height: 1; display: block; position: relative; -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; } #cssmenu ol, ul { float: right;} #cssmenu:after, #cssmenu > ul:after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; } #cssmenu #menu-button { display: none; } #cssmenu { width: auto; font-family: 'Open Sans', sans-serif; line-height: 1; background: #ffffff; } #menu-line { position: absolute; top: 0; left: 0; height: 3px; background: #009ae1; -webkit-transition: all 0.25s ease-out; -moz-transition: all 0.25s ease-out; -ms-transition: all 0.25s ease-out; -o-transition: all 0.25s ease-out; transition: all 0.25s ease-out; } #cssmenu > ul > li { float: left; } #cssmenu.align-center > ul { font-size: 0; text-align: center; } #cssmenu.align-center > ul > li { display: inline-block; float: none; } #cssmenu.align-center ul ul { text-align: left; } #cssmenu.align-right > ul > li { float: right; } #cssmenu.align-right ul ul { text-align: right; } #cssmenu > ul > li > a { padding: 20px; font-size: 12px; text-decoration: none; text-transform: uppercase; color: #000000; -webkit-transition: color .2s ease; -moz-transition: color .2s ease; -ms-transition: color .2s ease; -o-transition: color .2s ease; transition: color .2s ease; } #cssmenu > ul > li:hover > a, #cssmenu > ul > li.active > a { color: #009ae1; } #cssmenu > ul > li.has-sub > a { padding-right: 25px; } #cssmenu > ul > li.has-sub > a::after { position: absolute; top: 21px; right: 10px; width: 4px; height: 4px; border-bottom: 1px solid #000000; border-right: 1px solid #000000; content: ""; -webkit-transform: rotate(45deg); -moz-transform: rotate(45deg); -ms-transform: rotate(45deg); -o-transform: rotate(45deg); transform: rotate(45deg); -webkit-transition: border-color 0.2s ease; -moz-transition: border-color 0.2s ease; -ms-transition: border-color 0.2s ease; -o-transition: border-color 0.2s ease; transition: border-color 0.2s ease; } #cssmenu > ul > li.has-sub:hover > a::after { border-color: #009ae1; } #cssmenu ul ul { position: absolute; left: -9999px; } #cssmenu li:hover > ul { left: auto; } #cssmenu.align-right li:hover > ul { right: 0; } #cssmenu ul ul ul { margin-left: 100%; top: 0; } #cssmenu.align-right ul ul ul { margin-left: 0; margin-right: 100%; } #cssmenu ul ul li { height: 0; -webkit-transition: height .2s ease; -moz-transition: height .2s ease; -ms-transition: height .2s ease; -o-transition: height .2s ease; transition: height .2s ease; } #cssmenu ul li:hover > ul > li { height: 32px; } #cssmenu ul ul li a { padding: 10px 20px; width: 160px; font-size: 12px; background: #333333; text-decoration: none; color: #dddddd; -webkit-transition: color .2s ease; -moz-transition: color .2s ease; -ms-transition: color .2s ease; -o-transition: color .2s ease; transition: color .2s ease; } #cssmenu ul ul li:hover > a, #cssmenu ul ul li a:hover { color: #ffffff; } #cssmenu ul ul li.has-sub > a::after { position: absolute; top: 13px; right: 10px; width: 4px; height: 4px; border-bottom: 1px solid #dddddd; border-right: 1px solid #dddddd; content: ""; -webkit-transform: rotate(-45deg); -moz-transform: rotate(-45deg); -ms-transform: rotate(-45deg); -o-transform: rotate(-45deg); transform: rotate(-45deg); -webkit-transition: border-color 0.2s ease; -moz-transition: border-color 0.2s ease; -ms-transition: border-color 0.2s ease; -o-transition: border-color 0.2s ease; transition: border-color 0.2s ease; } #cssmenu.align-right ul ul li.has-sub > a::after { right: auto; left: 10px; border-bottom: 0; border-right: 0; border-top: 1px solid #dddddd; border-left: 1px solid #dddddd; } #cssmenu ul ul li.has-sub:hover > a::after { border-color: #ffffff; } @media all and (max-width: 768px), only screen and (-webkit-min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min--moz-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (-o-min-device-pixel-ratio: 2/1) and (max-width: 1024px), only screen and (min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min-resolution: 192dpi) and (max-width: 1024px), only screen and (min-resolution: 2dppx) and (max-width: 1024px) { #cssmenu { width: 100%; } #cssmenu ul { width: 100%; display: none; } #cssmenu.align-center > ul, #cssmenu.align-right ul ul { text-align: left; } #cssmenu ul li, #cssmenu ul ul li, #cssmenu ul li:hover > ul > li { width: 100%; height: auto; border-top: 1px solid rgba(120, 120, 120, 0.15); } #cssmenu ul li a, #cssmenu ul ul li a { width: 100%; } #cssmenu > ul > li, #cssmenu.align-center > ul > li, #cssmenu.align-right > ul > li { float: none; display: block; } #cssmenu ul ul li a { padding: 20px 20px 20px 30px; font-size: 12px; color: #000000; background: none; } #cssmenu ul ul li:hover > a, #cssmenu ul ul li a:hover { color: #000000; } #cssmenu ul ul ul li a { padding-left: 40px; } #cssmenu ul ul, #cssmenu ul ul ul { position: relative; left: 0; right: auto; width: 100%; margin: 0; } #cssmenu > ul > li.has-sub > a::after, #cssmenu ul ul li.has-sub > a::after { display: none; } #menu-line { display: none; } #cssmenu #menu-button { display: block; padding: 20px; color: #000000; cursor: pointer; font-size: 12px; text-transform: uppercase; } #cssmenu #menu-button::after { content: ''; position: absolute; top: 20px; right: 20px; display: block; width: 15px; height: 2px; background: #000000; } #cssmenu #menu-button::before { content: ''; position: absolute; top: 25px; right: 20px; display: block; width: 15px; height: 3px; border-top: 2px solid #000000; border-bottom: 2px solid #000000; } #cssmenu .submenu-button { position: absolute; z-index: 10; right: 0; top: 0; display: block; border-left: 1px solid rgba(120, 120, 120, 0.15); height: 52px; width: 52px; cursor: pointer; } #cssmenu .submenu-button::after { content: ''; position: absolute; top: 21px; left: 26px; display: block; width: 1px; height: 11px; background: #000000; z-index: 99; } #cssmenu .submenu-button::before { content: ''; position: absolute; left: 21px; top: 26px; display: block; width: 11px; height: 1px; background: #000000; z-index: 99; } #cssmenu .submenu-button.submenu-opened:after { display: none; } } 

 <script src="http://code.jquery.com/jquery-latest.min.js"></script> <!doctype html> <body> <div id='cssmenu'> <ul> <li><a href='#'>Home</a></li> <li class='active has-sub'><a href='#'>Products</a> <ul> <li class='has-sub'><a href='#'>Product 1</a> <ul> <li><a href='#'>Sub Product</a></li> <li><a href='#'>Sub Product</a></li> </ul> </li> <li class='has-sub'><a href='#'>Product 2</a> <ul> <li><a href='#'>Sub Product</a></li> <li><a href='#'>Sub Product</a></li> </ul> </li> </ul> </li> <li><a href='#'>About</a></li> <li><a href='#'>Contact</a></li> </ul> </div> </body> 

Bootstrap NAV MENU As you can see I would like to also move the blue highlight on the right side.

I think this is something to do with JavaScript. Could you please help me?

Cheers

http://jsfiddle.net/arketipi1/nk9m9gnL/1/

Answer 1

The problem is that you only get the position of your menu elements relative to their parent <ul> (0). You should add the ul's left position, relative to the document, to the position of your menuitems to place your menuline above the active items:

// left position of your ul
var ulPosition = $('#cssmenu > ul').position().left;
var linePosition = activeElement.position().left;
// add it to your item position
var defaultPosition = ulPosition + linePosition;

menuLine.css("width", lineWidth);
menuLine.css("left", defaultPosition);

$("#cssmenu > ul > li").hover(function() {
    activeElement = $(this);
    lineWidth = activeElement.width();
    linePosition = activeElement.position().left;
    menuLine.css("width", lineWidth);
    // same here
    menuLine.css("left", linePosition + ulPosition);
 },
 ....

Change these lines at the end of your js and it will work. Check the fiddle

hint: You could further wrap this code in functions and make it much cleaner, allowing to call the menuline position on .resize() of your document for more efficiency and fancyness