html - 模态滚动/溢出问题

Question

我正在使用来自 www.w3schools 的这个模式作为我正在为我的投资组合页面构建的模式的基础:http://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_modal2

模式是显示一长串文字来展示我的元素。我现在遇到的问题是，当信息过多时，它不会将滚动应用到模态。我尝试将 CSS 中的 overflow 更改为 overflow-y 但结果相同，我尝试将模态的高度从 100% 调整为设定大小但随后它破坏了模态上的背景并且甚至没有应用从溢出中滚动。有人知道如何解决这个问题吗？提前感谢任何能够帮助我的人。

jsfiddle:https://jsfiddle.net/5qv807b2/3/

HTML:

带页眉和页脚的动画模式

<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal</button>

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <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>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>END</p>
      <p>END</p>

    </div>
    <div class="modal-footer">
      <h3>Modal Footer</h3>
    </div>
  </div>

</div>

CSS:

/* 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;
}

脚本:

// 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";
    }
}

Answer 1

您需要在 .modal-body 上设置以下 css:

.modal-body {
  max-height: 50vh;  /* Change this value according to your needs */
  overflow: auto;
}

注意:请以整页模式观看demo。

// 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: 40px; /* 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;
  max-height: 50vh;
  overflow: auto;
}

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

<h2>Animated Modal with Header and Footer</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal</button>

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <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>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
      <p>END</p>
      <p>END</p>

    </div>
    <div class="modal-footer">
      <h3>Modal Footer</h3>
    </div>
  </div>

</div>