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我遇到CSS樣式的問題。我想設置我的模式的中心位置，但我不能，我不知道如何做到這一點。另外我不知道如何製作更小的模式尺寸。中心位置CSS
// Get the modal
var modal = document.getElementById('myModal');
// Get the button that opens the modal
var btn = document.getElementById("myBtn");
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = "block";
}
// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = "none";
}
// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}/* The Modal (background) */
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
padding-top: 100px; /* Location of the box */
left: 0;
top: 0;
width: 100%; /* Full width */
height: 100%; /* Full height */
overflow: auto; /* Enable scroll if needed */
background-color: rgb(0,0,0); /* Fallback color */
background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}
/* Modal Content */
.modal-content {
position: relative;
background-color: #fefefe;
margin: auto;
padding: 0;
border: 1px solid #888;
width: 80%;
box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
-webkit-animation-name: animatetop;
-webkit-animation-duration: 0.4s;
animation-name: animatetop;
animation-duration: 0.4s
}
/* Add Animation */
@-webkit-keyframes animatetop {
from {top:-300px; opacity:0}
to {top:0; opacity:1}
}
@keyframes animatetop {
from {top:-300px; opacity:0}
to {top:0; opacity:1}
}
/* The Close Button */
.close {
color: white;
float: right;
font-size: 28px;
font-weight: bold;
}
.close:hover,
.close:focus {
color: #000;
text-decoration: none;
cursor: pointer;
}
.modal-header {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}
.modal-body {padding: 2px 16px;}
.modal-footer {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}
.video-container {
position:relative;
padding-bottom:56.25%;
padding-top:30px;
height:0;
overflow:hidden;
}
.video-container iframe, .video-container object, .video-container embed {
position:absolute;
top:0;
left:0;
width:100%;
height:100%;
}<img src="https://upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Small-city-symbol.svg/348px-Small-city-symbol.svg.png" id="myBtn" class="image fit" alt="" />
\t <div id="myModal" class="modal">
\t \t <div class="modal-content">
\t \t \t <div class="modal-header">
\t \t \t \t <span class="close">×</span>
\t \t \t \t <h2>Header</h2>
\t \t \t </div>
\t \t \t <div class="modal-body">
\t \t \t <br />
\t \t \t <br />
\t \t \t <div class="video-container"><iframe width="100" height="100" src="https://www.youtube.com/embed/LRblJyq_4Ko?rel=0?ecver=1" frameborder="0" allowfullscreen></iframe></div>
\t \t \t </div>
\t \t </div>
\t </div>我想要永遠在中央模態和縮放。底部不能超過屏幕尺寸。
我試着運行你的代碼片段。在'.modal-content'類中將'width'從'80％'改爲'60％'會減小模式的大小，並且在'.modal'類中包含'margin-top：-3％'使得它超出並得到集中在。嘗試一下。 –