HTML 常见的JS弹窗

一、最简单的 javascript 弹窗代码实例

HTML代码

<!-- 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">
    <span class="close">&times;</span>
    <p>弹窗中的文本...</p>
  </div>
 
</div>

CSS代码

/* 弹窗 (background) */
.modal {
    display: none; /* 默认隐藏 */
    position: fixed; /* 固定定位 */
    z-index: 1; /* 设置在顶层 */
    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 {
    background-color: #fefefe;
    margin: 15% auto; 
    padding: 20px;
    border: 1px solid #888;
    width: 80%; 
}
 
/* 关闭按钮 */
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}
 
.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}

JS代码

// 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
var span = document.querySelector('.close');
 
// 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";
    }
}

展示效果

二、弹窗添加头部和底部

HTML代码

<!-- 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">&times;</span>
        <h2>弹窗头部</h2>
      </div>
      <div class="modal-body">
        <p>弹窗文本...</p>
        <p>弹窗文本...</p>
      </div>
      <div class="modal-footer">
        <h3>弹窗底部</h3>
      </div>
    </div>
</div>

CSS代码

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

JS代码（JS代码一般用作弹窗的开关，功能点和普通弹窗相同）

// 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";
    }
}

展示效果

三、在底部显示的弹窗

HTML代码

<!-- 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">&times;</span>
        <h2>弹窗头部</h2>
      </div>
      <div class="modal-body">
        <p>弹窗文本...</p>
        <p>弹窗文本...</p>
      </div>
      <div class="modal-footer">
        <h3>弹窗底部</h3>
      </div>
    </div>

</div>

CSS代码

/* 弹窗 */
.modal {
    display: none; /* 默认隐藏 */
    position: fixed; 
    z-index: 1; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    overflow: auto; 
    background-color: rgb(0,0,0); 
    background-color: rgba(0,0,0,0.4); 
    -webkit-animation-name: fadeIn; 
    -webkit-animation-duration: 0.4s;
    animation-name: fadeIn;
    animation-duration: 0.4s
}

/* 弹窗内容 */
.modal-content {
    position: fixed;
    bottom: 0;
    background-color: #fefefe;
    width: 100%;
    -webkit-animation-name: slideIn;
    -webkit-animation-duration: 0.4s;
    animation-name: slideIn;
    animation-duration: 0.4s
}

/* 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: #5cb85c;
    color: white;
}

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

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

/* 添加动画 */
@-webkit-keyframes slideIn {
    from {bottom: -300px; opacity: 0} 
    to {bottom: 0; opacity: 1}
}

@keyframes slideIn {
    from {bottom: -300px; opacity: 0}
    to {bottom: 0; opacity: 1}
}

@-webkit-keyframes fadeIn {
    from {opacity: 0} 
    to {opacity: 1}
}

@keyframes fadeIn {
    from {opacity: 0} 
    to {opacity: 1}
}

JS代码

// 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";
    }
}

展示效果

第一次写文章，不会导入视频😅，效果啥的以实际代码运行效果为准