操作方法 - CSS/JS 模态

了解如何使用 CSS 和 JavaScript 创建模态框。

如何创建模态框

模式是显示在当前页面顶部的对话框/弹出窗口：

步骤1）添加HTML：

示例

<button id="myBtn">Open Modal</button>


<div id="myModal" class="modal">


<div class="modal-content">
<span class="close">×</span>
<p>Some text in the Modal..</p>
</div>

</div>

步骤2）添加CSS：

示例

/* The Modal (background) */
.modal {
display: none; /* Hidden by default */
position: fixed; /* Stay in place */
z-index: 1; /* Sit on top */
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/Box */
.modal-content {
  background-color: #fefefe;
margin: 15% auto; /* 15% from the top and centered */
padding: 20px;
border: 1px solid #888;
width: 80%; /* Could be more or less, depending on screen size */
}

/* The Close Button */
.close {
color: #aaa;
float: right;
font-size: 28px;
font-weight: bold;
}

.close:hover,
.close:focus {
color: black;
  text-decoration: none;
  cursor: pointer;
}

步骤 3) 添加 JavaScript：

示例

// 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 on 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";
}
}

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添加页眉和页脚

为 modal-header、modal-body 和 modal-footer 添加一个类：

示例

<div class="modal-content">
<div class="modal-header">
    <span class="close">×</span>
    <h2>Modal Header</h2>
</div>
<div class="modal-body">
    <p>Some text in the Modal Body</p>
    <p>Some other text...</p>
</div>
<div class="modal-footer">
    <h3>Modal Footer</h3>
</div>
</div>

设置模态页眉、正文和页脚的样式，并添加动画（在模态中滑动）：

示例

/* Modal Header */
.modal-header {
padding: 2px 16px;
background-color: #5cb85c;
color: white;
}

/* Modal Body */
.modal-body {padding: 2px 16px;}

/* Modal Footer */
.modal-footer {
padding: 2px 16px;
background-color: #5cb85c;
  color: white;
}

/* 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);
  animation-name: animatetop;
  animation-duration: 0.4s
}

/* Add Animation */
@keyframes animatetop {
  from {top: -300px; opacity: 0}
to {top: 0; opacity: 1}
}

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底部模态 ("Bottom sheets")

有关如何创建从底部滑入的全角模态的示例：

示例

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提示：还请查看模态图片和灯箱。