js模态对话框使用方法详解

模态框(Modal  Dialogue Box)也可叫做对话框" title="模态对话框">模态对话框,或者对话框,当一个模态框被打开时,用户可以与该对话框进行交互,点击关闭按钮可关闭该模态框!

功能实现:

1. 页面上有一个按钮,用于打开模态框,模态框默认隐藏;

2. 用户点击按钮,可打开模态框;用户点击模态框中的关闭或者点击页面其他地方可关闭该模态框

✦  点击页面其他地方,关闭模态框,可用window.onclick事件

✦  给关闭按钮绑定点击事件,按钮被点击,模态框Modal添加样式display:none;

✦  给button按钮绑定点击事件,当按钮被点击时,模态框Modal添加样式display:block;

✦  先获取页面上的button按钮,关闭按钮,以及模态框Modal

代码实现:

<html>

<head>

<style>

/* 弹窗 (background) */

.modal {

display: none; /* 默认隐藏 */

position: fixed;

z-index: 1;

padding-top: 100px;

left: 0;

top: 0;

width: 100%;

height: 100%;

overflow: auto;

background-color: rgb(0,0,0);

background-color: rgba(0,0,0,0.4);

}

/* 弹窗内容 */

.modal-content {

position: relative;

background-color: #fefefe;

margin: auto;

padding: 0;

border: 1px solid #888;

width: 35%;

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

}

/* 添加动画 */

@-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}

}

/* 关闭按钮 */

.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: #5587A2;

color: white;

}

.modal-body {padding: 2px 16px;}

.modal-footer {

padding: 2px 16px;

background-color: #5587A2;

text-align: right;

color: white;

}

</style>

</head>

<body>

<!-- 打开弹窗按钮 -->

<button id="myBtn">打开弹窗</button>

<!-- 弹窗 -->

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

<!-- 弹窗内容 -->

<div class="modal-content">

<div class="modal-header">

<span class="close">×</span>

<h2>弹窗头部</h2>

</div>

<div class="modal-body">

<p>弹窗内容...</p>

<p>弹窗内容...</p>

</div>

<div class="modal-footer">

<h3>弹窗底部</h3>

</div>

</div>

</div>

<script>

// 获取弹窗

var modal = document.getElementById('myModal');

// 打开弹窗的按钮对象

var btn = document.getElementById("myBtn");

// 获取 <span> 元素,用于关闭弹窗 that closes the modal

var span = document.getElementsByClassName("close")[0];

// 点击按钮打开弹窗

btn.onclick = function() {

modal.style.display = "block";

}

// 点击 <span> (x), 关闭弹窗

span.onclick = function() {

modal.style.display = "none";

}

// 在用户点击其他地方时,关闭弹窗

window.onclick = function(event) {

if (event.target == modal) {

modal.style.display = "none";

}

}

</script>

</body>

</html>

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