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下拉菜单隐藏在图像后面

[英]dropdown is hidden behind image

 原文  2018-09-25 07:43:45  5   4    html/ css/ twitter-bootstrap/ drop-down-menu

问题描述

My Dropdown is hiding behind the image ( owl carousal one) when scroll down the nav bar then hover works properly.当向下滚动导航栏然后悬停正常工作时，我的下拉菜单隐藏在图像后面（owl carousal one）。

Issue showing only in the upper area where the image is there.问题仅显示在图像所在的上部区域。

I tried by giving z-index.我尝试通过给出 z-index。 By giving higher value to navbar than image slider.通过为导航栏提供比图像滑块更高的值。 But that doesn't work.但这不起作用。

And I tried overflow value also.我也试过溢出值。

I gave overflow: visible;我给了溢出：可见； to navbar but still, it's not visible.到导航栏，但仍然不可见。

Screenshot of error dropdown错误下拉菜单的屏幕截图

未完全显示的下拉列表 

 jQuery(document).ready(function($) { $("#owl-demo").owlCarousel({ navigation : true, slideSpeed : 300, paginationSpeed : 500, items: 1, singleItem: true, autoPlay : 4000 }); }); $('body').on('mouseenter mouseleave','.dropdown',function(e){ var _d=$(e.target).closest('.dropdown'); _d.addClass('show'); setTimeout(function(){ _d[_d.is(':hover')?'addClass':'removeClass']('show'); $('[data-toggle="dropdown"]', _d).attr('aria-expanded',_d.is(':hover')); },300); });
 /*sticky header position*/ .sticky.is-sticky { position: fixed; left: 0; right: 0; top: 0; z-index: 999; width: 100%; } header { background: transparent !important; } /*body {*/ /*min-height: 1200px;*/ /*}*/ nav { background-color: #000000; min-height: 85px; color: white; opacity: 0.7; } .dropdown:hover>.dropdown-menu { display: block; overflow: visible; z-index: 1000; position: inherit; margin-top: 10%; } nav ul li a { color: white !important; } .top-div { font-size: 14px; background-color: black; color: white; padding-top: 10px; } .top-div p .fa-map-marker{ margin-left: 4%; } .top-div pi { margin-right: 0.5%; margin-left: 3%; color: #c6b52d; } /* Ow; Slider CSS*/ #owl-demo { z-index: 30; } .owl-wrapper { positon: relative; } .owl-controls { position: absolute; bottom: 10px; left: 0; right: 0; margin-left: auto; margin-right: auto; } .owl-theme .owl-controls .owl-page span { background: #fff !important; } .owl-img { width: 100%; } .owl-text-overlay { position: absolute; text-align: center; width: 60%; top: 50%; transform: translateY(-50%); left: 0; right: 0; margin-left: auto; margin-right: auto; color: #fff; background-color: rgba(0, 0, 0, 0.4); background: rgba(0, 0, 0, 0.4); padding-bottom: 20px; font-family: "Open Sans", sans-serif; border-radius: 15px 50px 30px 5px; }
 <!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Imagine</title> <link href="https://fonts.googleapis.com/css?family=Ubuntu:300,400,800" rel="stylesheet"> <link rel="stylesheet" href="main.css"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.css"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.theme.min.css"> <script src="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.js"></script> </head> <body> <!--top header--> <header> <!--most top info --> <!--<div style="height: 40px; background: red"></div>--> <!-- End most top info --> <nav class="navbar navbar-expand-lg navbar-light top-navbar" data-toggle="sticky-onscroll"> <div class="container"> <a class="navbar-brand" href="#"> <img src="assets/images/Logo-white.png" height="70" alt=""> </a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse justify-content-end" id="navbarSupportedContent"> <ul class="navbar-nav pull-right"> <li class="nav-item"> <a class="nav-link active" href="#">Home</a> </li> <li class="nav-item"> <a class="nav-link" href="about-us.html">Who We Are</a> </li> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Dropdown link </a> <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink"> <a class="dropdown-item" href="#">Action</a> <a class="dropdown-item" href="#">Another action</a> <a class="dropdown-item" href="#">Something else here</a> </div> </li> <li class="nav-item"> <a class="nav-link" href="#">Support & Service</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Contact Us</a> </li> </ul> </div> </div> </nav> </header> <div class="owl-carousel owl-theme" id="owl-demo"> <div> <div class="owl-text-overlay hidden-xs"> <h2 class="owl-title">Arrow</h2> <p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p> </div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628443/arrow_dqnmmf.jpg"></div> <div> <div class="owl-text-overlay hidden-xs"> <h2 class="owl-title">Flash</h2> <p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p> </div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628444/flash_pxythx.jpg"></div> </div>

4 个解决方案

解决方案1
 4 已采纳  2018-09-25 07:52:45

Add z-index to nav .将z-index添加到nav 。

The z-index property specifies the stack order of an element. z-index 属性指定元素的堆栈顺序。

Reference参考

 jQuery(document).ready(function($) { $("#owl-demo").owlCarousel({ navigation : true, slideSpeed : 300, paginationSpeed : 500, items: 1, singleItem: true, autoPlay : 4000 }); }); $('body').on('mouseenter mouseleave','.dropdown',function(e){ var _d=$(e.target).closest('.dropdown'); _d.addClass('show'); setTimeout(function(){ _d[_d.is(':hover')?'addClass':'removeClass']('show'); $('[data-toggle="dropdown"]', _d).attr('aria-expanded',_d.is(':hover')); },300); });
 /*sticky header position*/ .sticky.is-sticky { position: fixed; left: 0; right: 0; top: 0; z-index: 999; width: 100%; } header { background: transparent !important; } /*body {*/ /*min-height: 1200px;*/ /*}*/ nav { background-color: #000000; min-height: 85px; color: white; opacity: 0.7; z-index: 999999; //Add this } .dropdown:hover>.dropdown-menu { display: block; overflow: visible; z-index: 1000; position: inherit; margin-top: 10%; } nav ul li a { color: white !important; } .top-div { font-size: 14px; background-color: black; color: white; padding-top: 10px; } .top-div p .fa-map-marker{ margin-left: 4%; } .top-div pi { margin-right: 0.5%; margin-left: 3%; color: #c6b52d; } /* Ow; Slider CSS*/ #owl-demo { z-index: 30; } .owl-wrapper { positon: relative; } .owl-controls { position: absolute; bottom: 10px; left: 0; right: 0; margin-left: auto; margin-right: auto; } .owl-theme .owl-controls .owl-page span { background: #fff !important; } .owl-img { width: 100%; } .owl-text-overlay { position: absolute; text-align: center; width: 60%; top: 50%; transform: translateY(-50%); left: 0; right: 0; margin-left: auto; margin-right: auto; color: #fff; background-color: rgba(0, 0, 0, 0.4); background: rgba(0, 0, 0, 0.4); padding-bottom: 20px; font-family: "Open Sans", sans-serif; border-radius: 15px 50px 30px 5px; }
 <!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Imagine</title> <link href="https://fonts.googleapis.com/css?family=Ubuntu:300,400,800" rel="stylesheet"> <link rel="stylesheet" href="main.css"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.css"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.css"> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.theme.min.css"> <script src="https://cdnjs.cloudflare.com/ajax/libs/owl-carousel/1.3.3/owl.carousel.min.js"></script> </head> <body> <!--top header--> <header> <!--most top info --> <!--<div style="height: 40px; background: red"></div>--> <!-- End most top info --> <nav class="navbar navbar-expand-lg navbar-light top-navbar" data-toggle="sticky-onscroll"> <div class="container"> <a class="navbar-brand" href="#"> <img src="assets/images/Logo-white.png" height="70" alt=""> </a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse justify-content-end" id="navbarSupportedContent"> <ul class="navbar-nav pull-right"> <li class="nav-item"> <a class="nav-link active" href="#">Home</a> </li> <li class="nav-item"> <a class="nav-link" href="about-us.html">Who We Are</a> </li> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Dropdown link </a> <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink"> <a class="dropdown-item" href="#">Action</a> <a class="dropdown-item" href="#">Another action</a> <a class="dropdown-item" href="#">Something else here</a> </div> </li> <li class="nav-item"> <a class="nav-link" href="#">Support & Service</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Contact Us</a> </li> </ul> </div> </div> </nav> </header> <div class="owl-carousel owl-theme" id="owl-demo"> <div> <div class="owl-text-overlay hidden-xs"> <h2 class="owl-title">Arrow</h2> <p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p> </div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628443/arrow_dqnmmf.jpg"></div> <div> <div class="owl-text-overlay hidden-xs"> <h2 class="owl-title">Flash</h2> <p class="owl-caption hidden-sm">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent iaculis purus vel enim suscipit, vitae volutpat ante scelerisque. Pellentesque blandit malesuada dui, sed aliquet risus molestie non.</p> </div><img class="owl-img" src="https://res.cloudinary.com/jbennett45/image/upload/v1474628444/flash_pxythx.jpg"></div> </div>

解决方案2
 1  2018-09-25 08:46:41

You need to add z-index: 999 to the .navbar class.您需要将z-index: 999添加到.navbar类。 This is the overall parent of the dropdown menu.这是下拉菜单的整体父级。

Just a sidenote: You may want to change the color text for the submenu items as they are currently white, matching the background image and not visible.只是一个旁注：您可能想要更改子菜单项的颜色文本，因为它们当前是白色的，与背景图像匹配并且不可见。

Here is working fiddle: https://jsfiddle.net/Ly06krt3/20/这是工作小提琴： https : //jsfiddle.net/Ly06krt3/20/

解决方案3
 0  2018-09-25 08:50:23

只需将 z-index 添加到下拉列表中，它应该大于图像及其父级（如果有）的 z-index。

解决方案4
 0  2020-08-05 21:34:30

If Z-index is not working, another possibility is that Overflow is set to hidden.如果 Z-index 不起作用，另一种可能是溢出设置为隐藏。 Which is what happened to me just now.这就是刚刚发生在我身上的事情。

解决方案5
 -1  2019-11-07 08:06:49

朋友您好，只需将z索引添加到您的导航栏，即可查看魔术Thanx。

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