html - 仅 CSS 弹出窗口 - 页面在关闭时移动

Question

我正在尝试创建一个仅限 CSS 的欢迎弹出窗口。一切正常，除非您关闭它时，页面会向下移动到弹出 div 原来所在的位置。我该如何修复它，以便在关闭弹出窗口时页面不会移动？

我正在使用以下....

http://codepen.io/john84/pen/WrOZJj

HTML

<h1>Popup/Modal Windows without JavaScript</h1>
<div class="box">

<a class="button" href="#">Login /signup</a>
</div>

<div id="popup1" class="overlay">
<div class="popup">
<h2>Here i am</h2>
<a class="close" href="#popup1">&times;</a>
<div class="content">
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam eleifend nunc non malesuada feugiat. Fusce lacinia urna sed nunc accumsan viverra.
</div>
</div>
</div>

CSS

*, *:after, *:before {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
body {
font-family: Arial, sans-serif;
background: url(http://www.shukatsu-note.com/wp-content/uploads/2014/12/computer-564136_1280.jpg) no-repeat;
background-size: cover;
height: 100vh;
}

h1 {
text-align: center;
font-family: Tahoma, Arial, sans-serif;
color: #06D85F;
margin: 100px 0;
}

.box {
width: 40%;
margin: 0 auto;
background: rgba(255,255,255,0.2);
padding: 35px;
border: 2px solid #fff;
border-radius: 20px/50px;
background-clip: padding-box;
text-align: center;
}

.button {
font-size: 1em;
padding: 10px;
color: #fff;
border: 2px solid #06D85F;
border-radius: 20px/50px;
text-decoration: none;
cursor: pointer;
transition: all 0.3s ease-out;
}
.button:hover {
background: #06D85F;
}

.popup h2 {
margin-top: 0;
color: #333;
font-family: Tahoma, Arial, sans-serif;
}
.popup .close {
position: absolute;
top: 20px;
right: 30px;
transition: all 0.2s;
font-size: 30px;
font-weight: bold;
text-decoration: none;
color: #333;
}
.popup .close:hover {
color: #06D85F;
}
.popup .content {
max-height: 30%;
overflow: auto;
}

/*Let's make it appear when the page loads*/
.overlay:target:before {
display: none;
}
.overlay:before {
content:"";
top: 0;
left: 0;
right: 0;
bottom: 0;
display: block;
background: rgba(0, 0, 0, 0.6);
position: fixed;
z-index: 9;
}
.overlay .popup {
background: #fff;
border-radius: 5px;
width: 30%;
position: fixed;
top: 0;
left: 35%;
padding: 25px;
margin: 70px auto;
z-index: 10;
-webkit-transition: all 0.6s ease-in-out;
-moz-transition: all 0.6s ease-in-out;
transition: all 0.6s ease-in-out;
}
.overlay:target .popup {
top: -100%;
left: -100%;
}

@media screen and (max-width: 768px){
.box{
width: 70%;
}
.overlay .popup{
width: 70%;
left: 15%;
}
}

Answer 1

改变

.overlay:target:before {
    display: none;
}

到

.overlay:target{
    display: none;
}

改变

<div class="box">
<a class="button" href="#">Login /signup</a>

到

<div class="box" id='box'>
 <a class="button" href="#box">Login /signup</a>

这将强制 :target 在单击按钮时将焦点放在按钮上，并在按钮所在的位置显示您的框。 :target 伪通常将焦点添加到它链接到的元素上。这意味着它将“向上或向下滚动”页面以找到该元素。了解此伪工作原理的有用链接是 here

这是工作代码段(限制:如您的示例所示，弹出框不会滑出窗口....)

*, *:after, *:before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
body {
  font-family: Arial, sans-serif;
  background: url(http://www.shukatsu-note.com/wp-content/uploads/2014/12/computer-564136_1280.jpg) no-repeat;
  background-size: cover;
  height: 100vh;
}

h1 {
  text-align: center;
  font-family: Tahoma, Arial, sans-serif;
  color: #06D85F;
  margin: 100px 0;
}

.box {
  width: 40%;
  margin: 0 auto;
  background: rgba(255,255,255,0.2);
  padding: 35px;
  border: 2px solid #fff;
  border-radius: 20px/50px;
  background-clip: padding-box;
  text-align: center;
}

.button {
  font-size: 1em;
  padding: 10px;
  color: #fff;
  border: 2px solid #06D85F;
  border-radius: 20px/50px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease-out;
}
.button:hover {
  background: #06D85F;
}

.popup h2 {
  margin-top: 0;
  color: #333;
  font-family: Tahoma, Arial, sans-serif;
}
.popup .close {
  position: absolute;
  top: 20px;
  right: 30px;
  transition: top,right 0.2s;
  font-size: 30px;
  font-weight: bold;
  text-decoration: none;
  color: #333;
}
.popup .close:hover {
  color: #06D85F;
}
.popup .content {
  max-height: 30%;
  overflow: auto;
}

/*Let's make it appear when the page loads*/
#popup1:target{
     top: -100%;
    left: -100%;
    display:none;
}

.overlay:before {
  content:"";
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: block;
  background: rgba(0, 0, 0, 0.6);
  position: fixed;
  z-index: 9;
}
.overlay .popup {
  background: #fff;
  border-radius: 5px;
  width: 30%;
  position: fixed;
  top: 0;
  left: 35%;
  padding: 25px;
  margin: 70px auto;
  z-index: 10;
  -webkit-transition: all 0.6s ease-in-out;
  -moz-transition: all 0.6s ease-in-out;
  transition: all 0.6s ease-in-out;
}
.overlay:target .popup {
    top: -100%;
    left: -100%;
}

@media screen and (max-width: 768px){
  .box{
    width: 70%;
  }
  .overlay .popup{
    width: 70%;
    left: 15%;
  }
}

<h1>Popup/Modal Windows without JavaScript</h1>
<div class="box" id='box'>
	<a class="button" href="#box">Login /signup</a>
</div>
<br><br><br><br><br><br><br><br>
<div id="popup1" class="overlay">
	<div class="popup">
		<h2>Here i am</h2>
		<a class="close" href="#popup1">&times;</a>
		<div class="content">
			Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam eleifend nunc non malesuada feugiat. Fusce lacinia urna sed nunc accumsan viverra.
		</div>
	</div>
</div>