Bootstrap 中下拉菜单修改成鼠标悬停直接显示[原创]_javascript技巧

.nav > li:hover .dropdown-menu {display: block;}

//关闭click.bs.dropdown.data-api事件，使顶级菜单可点击
$(document).off('click.bs.dropdown.data-api');
//自动展开
$('.nav .dropdown').mouseenter(function(){
$(this).addClass('open');
});
//自动关闭
$('.nav .dropdown').mouseleave(function(){
$(this).removeClass('open');
});