点击添加和删除CSS

Question

我有一个Jquery和CSS的问题，也许标题听起来重复，但我真的搜查，我找不到解决方案，或者我错过了一些东西。

这就是这种情况。我正在建立一个汉堡包菜单的网站，但我希望它显示为一个lightbox。我发现的第一个问题是，灯箱没有在移动设备上固定，所以我使用的覆盖效果很好，但在移动设备上，滚动感觉很奇怪。我发现它发生的属性“溢出：汽车;”在背景div中，但是如果我删除它，叠加层将沿着页面滚动，而这正是我不想要的。

所以，我需要的背景有属性“溢出：可见;”当页面加载使滚动平滑时，并且只有当覆盖层出现时，它才会变成“自动”来修复它。我试图在覆盖层的jquery脚本中做到这一点，但是当覆盖层关闭时，它保留的新属性和滚动变得很奇怪。

下面是代码：

<div class='navbar-toggle' title='Menu'> 

       <div class='bar1'></div> 
       <div class='bar2'></div> 
       <div class='bar3'></div> 
      </div> 
      <nav class="nav-hide overlay"> 
      <ul class="overlay-content"> 
      <li><a href="#">Inicio</a></li> 
      <li><a href="#">Servicios</a></li> 
      <li><a href="#">Citas</a></li> 
      <li><a href="#">Portfolio</a></li> 
      <li><a href="#">Blog</a></li> 
      </ul> 
     </nav> 
      <div class="background-content"> 
      <div id="col">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. 
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.<br><br> 
     Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?<br><br> 
     But I must explain to you how all this mistaken idea of denouncing pleasure and praising pain was born and I will give you a complete account of the system, and expound the actual teachings of the great explorer of the truth, the master-builder of human happiness. No one rejects, dislikes, or avoids pleasure itself, because it is pleasure, but because those who do not know how to pursue pleasure rationally encounter consequences that are extremely painful. Nor again is there anyone who loves or pursues or desires to obtain pain of itself, because it is pain, but because occasionally circumstances occur in which toil and pain can procure him some great pleasure. 
To take a trivial example, which of us ever undertakes laborious physical exercise, except to obtain some advantage from it? But who has any right to find fault with a man who chooses to enjoy a pleasure that has no annoying consequences, or one who avoids a pain that produces no resultant pleasure?</div> 
      </div> 

      <script src='//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script> 

CSS：

body, 
html { 
    margin: 0; 
    padding: 0; 
    height: 100%; 
} 

nav, 
.navbar-toggle { 
    -webkit-touch-callout: none; 
    -webkit-user-select: none; 
    -khtml-user-select: none; 
    -moz-user-select: none; 
    -ms-user-select: none; 
    user-select: none; 
} 

nav { 
    position: absolute; 
    z-index: 10; 
    background-color: #E2B7C0; 
    width: 100%; 
    height: 100%; 
    text-align: center; 
    display: table; 
    color: white; 
} 

.nav-hide { display: none; } 

nav ul { 
    display: table-cell; 
    vertical-align: middle; 
    padding-left: 0 !important; 
} 

nav ul li { list-style: none; margin-bottom: 15px;} 

nav ul li a { 
    font-size: 25px; 
    color: inherit; 
    font-weight: normal; 
    text-decoration: none; 
} 

.navbar-toggle { 
    position:fixed; 
    top: 30px; 
    left: 30px; 
    width: 45px; 
    height: 45px; 
    z-index: 20; 
    cursor: pointer; 
} 

.bar1, 
.bar2, 
.bar3 { 
    width: 100%; 
    height: 3px; 
    margin-bottom: 10px; 
    background-color: #1c1f72; 
    transition: all 0.3s ease-in-out; 
} 

.navbar-on .bar1, 
.navbar-on .bar2, 
.navbar-on .bar3 { background-color: white; } 

.navbar-on .bar1 { 
    transform-origin: 10% 40%; 
    transform: rotate(45deg); 
} 

.navbar-on .bar3 { 
    transform-origin: 10% 40%; 
    transform: rotate(-45deg); 
} 

.navbar-on .bar2 { background-color: transparent; } 

#col{ 
    margin: 80px 30px; 
    max-width: 600px; 
} 

.overlay{ 
     position: fixed; 
     top: 0px; 
     left: 0px; 
     right: 0px; 
     bottom: 0px; 
    } 

.overlay .overlay-content { 
      height: 100%; 
      overflow: scroll; 
     } 

.background-content{ 
     height: 100%; 
    } 

脚本：

$(function() { 
    $('.navbar-toggle, nav').click(function(){ 
     $('.navbar-toggle').toggleClass('navbar-on'); 
     $('nav').fadeToggle(); 
     $('nav').removeClass('nav-hide'); 
     $('.overlay').css('display',''); 
     $('.background-content').css('overflow','auto'); //This is the line that I add 
    }); 
}); 

https://jsfiddle.net/Trebohdz/t2nz3aoy/5/

覆盖的代码是，我找到了一个解决方案他re，我试图使用.addClass和.removeClass事件，甚至.on和.off，但它不起作用，或者我不知道如何将它集成到代码中。

我希望你能帮助我。

Answer 1

你可以创建一个css类和toggle： -

$(function() { 
    $('.navbar-toggle, nav').click(function() { 
    $('.navbar-toggle').toggleClass('navbar-on'); 
    $('nav').fadeToggle(); 
    $('nav').removeClass('nav-hide'); 
    $('.overlay').css('display', ''); 
    $('.background-content').toggleClass('overflow-auto'); 
    }); 
}); 

.overflow-auto { 
    overflow: auto; 
}