滑入式导航覆盖

Question

我有一个off-screen nav模板，当单击toggle时，它会从左侧滑入。 我想发生的是，当nav滑入时，叠加层会使它后面的内容变暗。 为此，我将页面内容包装在div中，并尝试添加BG颜色来覆盖内容，但似乎不起作用。

谁能帮忙？代码如下：

$(document).ready(function() {
	var toggle = $('.toggle');
	var osNav = $('.offScreen-nav');
	var pageContainer = $('.page-container');
	
	toggle.click(function() {
		osNav.toggleClass('showNav');
		pageContainer.toggleClass('navOnScreen')
	});
})

* {
	margin: 0;
	padding: 0;
	overflow: hidden;
}
nav {
	width: 100%;
	height: 70px;
	//border: 1px solid;
	background-color: #f1f1f1;
	display: flex;
	flex-direction: row;
	justify-content: flex-end;
}
.toggle {
	height: 50px;
	width: 50px;
	border: 1px solid;
	background-color: rgba(17,17,17, .9);
	opacity: .9;
	margin: 20px 15px;
	cursor: pointer;
	align-self: center;
}
main {
	height: 1000px;
	background-color: #ddd;
}
.offScreen-nav {
	width: 340px;
	height: 100vh;
	position: fixed;
	margin-left: 0;
	overflow: hidden;
	z-index: 2000;
	background-color: rgba(17,17,17, .9);
	transition: all .3s ease-in-out;
	transform: translate3d(-340px,0,0);
}
.showNav {
	transform: translate3d(0,0,0);
}
.page-container {
	transform: translate3d(0,0,0);
	transition: all .3s ease-in-out;
	transition-delay: .1s;
}
.page-container.navOnScreen {
	background-color: rgba(0,0,0, .6);
	transform: translate3d(20px,0,0);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="offScreen-nav"></div>
<div class="page-container">
	<nav>
	<div class="toggle"></div>
</nav>
	<main></main>	
</div>

Answer 1

我通常做的是添加另一个称为 overlay 的元素，并在切换导航项以产生该效果时切换它。我还会将切换按钮移出导航，以便您可以为其提供绝对位置，因为您需要应用 z 索引以在启用叠加层时保持可见。见下文...希望对您有所帮助！

$(document).ready(function() {
	var toggle = $('.toggle');
	var osNav = $('.offScreen-nav');
	var overlay = $('.overlay');
	var pageContainer = $('.page-container');
	
	toggle.click(function() {
		osNav.toggleClass('showNav');
		overlay.toggleClass('showNav');
		pageContainer.toggleClass('navOnScreen')
	});
})

* {
	margin: 0;
	padding: 0;
	overflow: hidden;
}
nav {
	width: 100%;
	height: 70px;
	//border: 1px solid;
	background-color: #f1f1f1;
	display: flex;
	flex-direction: row;
	justify-content: flex-end;
}
.toggle {
    height: 50px;
    width: 50px;
    border: 1px solid;
    background-color: rgba(17,17,17, .9);
    opacity: .9;
    /* margin: 20px 15px; */
    cursor: pointer;
    align-self: center;
    position: absolute;
    top: 10px;
    right: 15px;
    z-index: 2;
}
main {
	height: 1000px;
	background-color: #ddd;
}
.offScreen-nav {
	width: 340px;
	height: 100vh;
	position: fixed;
	margin-left: 0;
	overflow: hidden;
	z-index: 2000;
	background-color: rgba(17,17,17, .9);
	transition: all .3s ease-in-out;
	transform: translate3d(-340px,0,0);
}
.showNav {
	transform: translate3d(0,0,0);
}
.page-container {
	transform: translate3d(0,0,0);
	transition: all .3s ease-in-out;
	transition-delay: .1s;
}
.page-container.navOnScreen {
	background-color: rgba(0,0,0, .6);
	transform: translate3d(20px,0,0);
}
.overlay.showNav {
    width: 100vw;
    height: 100vh;
    background: blue;
    position: fixed;
    z-index: 1;
}
.overlay{
	transition:0.3s ease;	
  opacity: 0.5;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="offScreen-nav"></div>
<div class="overlay"></div>
<div class="toggle"></div>
<div class="page-container">
	<nav>
</nav>
	<main></main>	
</div>

Answer 2

从nav和main中删除background-color（它目前与body的背景颜色重叠），例如，

在 JS 中：

// Toggle a class which removes background-color from main & nav
nav.toggleClass('remove-bg')
main.toggleClass('remove-bg')

在 CSS 中：

/* Resetting background-color to transparent */
.remove-bg {
  background: transparent;
}
/* To get the transition well */
main, nav {
  transition: all .3s ease-in-out;
  transition-delay: .1s;
}

看看下面的片段：

$(document).ready(function() {
	var toggle = $('.toggle');
	var osNav = $('.offScreen-nav');
	var pageContainer = $('.page-container');
	var nav = $('nav');
  var main = $('main');
	
	toggle.click(function() {
		osNav.toggleClass('showNav');
		pageContainer.toggleClass('navOnScreen')
    nav.toggleClass('remove-bg')
    main.toggleClass('remove-bg')
	});
})

* {
	margin: 0;
	padding: 0;
	overflow: hidden;
}
nav {
	width: 100%;
	height: 70px;
	//border: 1px solid;
	background-color: #f1f1f1;
	display: flex;
	flex-direction: row;
	justify-content: flex-end;
  transition: all .3s ease-in-out;
	transition-delay: .1s;
}
.toggle {
	height: 50px;
	width: 50px;
	border: 1px solid;
	background-color: rgba(17,17,17, .9);
	opacity: .9;
	margin: 20px 15px;
	cursor: pointer;
	align-self: center;
}
main {
	height: 1000px;
	background-color: #ddd;
  transition: all .3s ease-in-out;
	transition-delay: .1s;
}
.offScreen-nav {
	width: 340px;
	height: 100vh;
	position: fixed;
	margin-left: 0;
	overflow: hidden;
	z-index: 2000;
	background-color: rgba(17,17,17, .9);
	transition: all .3s ease-in-out;
	transform: translate3d(-340px,0,0);
}
.showNav {
	transform: translate3d(0,0,0);
}
.page-container {
	transform: translate3d(0,0,0);
	transition: all .3s ease-in-out;
	transition-delay: .1s;
}
.page-container.navOnScreen {
	background-color: rgba(0,0,0, .6);
	transform: translate3d(20px,0,0);
}
.remove-bg {
  background: transparent;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="offScreen-nav"></div>
<div class="page-container">
	<nav>
	<div class="toggle"></div>
</nav>
	<main></main>	
</div>

希望这有帮助！

Answer 3

你可以做这样的事情：

$(document).ready(function() {
  var toggle = $('.toggle');
  var osNav = $('.offScreen-nav');
  var pageContainer = $('.page-container');
  var darkLayer = $('main, nav');
  toggle.click(function() {
    $(this).toggleClass('border');
    osNav.toggleClass('showNav');
    darkLayer.toggleClass('darkLayer');
    pageContainer.toggleClass('navOnScreen');
  });
})

* {
	margin: 0;
	padding: 0;
	overflow: hidden;
}
nav {
	width: 100%;
	height: 70px;
	//border: 1px solid;
	background-color: #f1f1f1;
	display: flex;
	flex-direction: row;
	justify-content: flex-end;
}
.toggle {
	height: 50px;
	width: 50px;
	border: 1px solid;
	background-color: rgba(17,17,17, .9);
	opacity: .9;
	margin: 20px 15px;
	cursor: pointer;
	align-self: center;
}
main {
	height: 1000px;
	background-color: #ddd;
}
.offScreen-nav {
	width: 340px;
	height: 100vh;
	position: fixed;
	margin-left: 0;
	overflow: hidden;
	z-index: 2000;
	background-color: rgba(17,17,17, .9);
	transition: all .3s ease-in-out;
	transform: translate3d(-340px,0,0);
}
.showNav {
	transform: translate3d(0,0,0);
}
.page-container {
	transform: translate3d(0,0,0);
	transition: all .3s ease-in-out;
	transition-delay: .1s;
}
.page-container.navOnScreen {
	background-color: rgba(0,0,0,.6);
	transform: translate3d(20px,0,0);
}
.darkLayer {
  background: #333;
  opacity: .5;
  transition: all .3s linear;
}
.border {
  border-color: #fff;
  transition: all .3s linear;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="offScreen-nav"></div>
<div class="page-container">
  <nav>
    <div class="toggle"></div>
  </nav>
  <main></main>	
</div>