jquery - 单击时添加和删除 CSS

Question

我有一个关于 Jquery 和 CSS 的小问题，也许标题听起来重复，但我真的搜索了但找不到解决方案，或者我可能错过了一些东西。

情况是这样的。我正在构建一个带有汉堡菜单的网站，但我希望它像灯箱一样显示。我发现的第一个问题是灯箱在移动设备上没有固定，所以我使用了一个效果很好的覆盖，但在移动设备上，滚动感觉很奇怪。我发现它发生在属性“overflow: auto;”上。在背景 div 中，但如果我删除它，叠加层将沿页面滚动，而这正是我不想要的。

因此，我需要背景具有属性“溢出:可见；”当页面加载时使滚动平滑，并且只有当覆盖出现时它才会更改为“自动”以修复它。我尝试在覆盖层的 jquery 脚本中执行此操作，但是当覆盖层关闭时，它会保留新属性并且滚动变得很奇怪。

代码如下:

    <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/

覆盖的代码是我在这里找到的解决方案，我尝试过使用.addClass和.removeClass事件，甚至.on和.off，但它不起作用或者我不知道如何集成它到代码。

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;
}