Question

我如何将用户输入转换为模态中的可点击链接？（用户条目将采用URL格式，例如www.bbc.co.uk）。我使用的代码纯粹来自w3c学校，我正在试验如何优化模块。我在下面添加了代码。

  <br><b>URL</b> <input type="text" size="40" value="" name="url" id="url" class="form-control" title="Enter the URL of a web page" onchange="displayURL()">

<br><br><br><br><br>
<style>
/* 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 */
    font-family: foco;
    
}

/* Modal Content */
.modal-content {
    position: relative;
    background-color: white;
    margin: auto;
    font-size: 15px;
    padding: 0;
    border: 1px solid #888;
    width: 40%;
    
    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: 0.3s;
    animation-name: animatetop;
    animation-duration: 0.3s
    
}

/* 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: #4286f4;
    color: white;
}

.modal-body {padding: 2px 16px;}


}
</style>



<!-- 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">&times;</span>
      <h2>DEMO</h2>
    </div>
    <div class="modal-body">
      <p>Click on the link:</p>
      <p id="skkr"></p>
      <a id="skkr" href="IM LOST"></a>
      <script>
function displayURL() {
    document.getElementById("skkr").innerHTML = 
document.getElementById("url").value;
}

</script>

    </div>
   
  </div>

</div>

<script>
// 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";
    }
}
</script>

谢谢

Answer 1

实际上非常简单，您必须将从输入框读取的数据放入锚标记：

  <br><b>URL</b> <input type="text" size="40" value="" name="url" id="url" class="form-control" title="Enter the URL of a web page" onchange="displayURL()">

<br><br><br><br><br>
<style>
/* 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 */
    font-family: foco;
    
}

/* Modal Content */
.modal-content {
    position: relative;
    background-color: white;
    margin: auto;
    font-size: 15px;
    padding: 0;
    border: 1px solid #888;
    width: 40%;
    
    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: 0.3s;
    animation-name: animatetop;
    animation-duration: 0.3s
    
}

/* 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: #4286f4;
    color: white;
}

.modal-body {padding: 2px 16px;}


}
</style>



<!-- 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">&times;</span>
      <h2>DEMO</h2>
    </div>
    <div class="modal-body">
      <p>Click on the link:</p>
      <p id="skkr"></p>
      <a id="skkr" href="IM LOST"></a>
      <script>
function displayURL() {
    var readValue=document.getElementById("url").value;
    document.getElementById("skkr").innerHTML = '<a href="'+readValue+'">'+readValue+'</a>';
}

</script>

    </div>
   
  </div>

</div>

<script>
// 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";
    }
}
</script>

重要的部分是：

var readValue=document.getElementById("url").value;
document.getElementById("skkr").innerHTML = '<a href="'+readValue+'">'+readValue+'</a>';

Answer 2

你有两个id为'skkr'的元素。那是错的。

从此行<p id="skkr"></p>

中删除ID“skkr”

接下来，更新函数displayURL（），如下所示：

var link = document.getElementById("skkr");
var url = document.getElementById("url").value;
link.setAttribute("href",url);
link.innerHTML = url;

Answer 3

W3 Schools为这件事提供了一个很好的小演示。

<!DOCTYPE html>
<html>
<body>

<p>Click the button to display a string as a hyperlink.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var str = "Free Web Building Tutorials!";
    var result = str.link("https://www.w3schools.com");
    document.getElementById("demo").innerHTML = result;
}
</script>

</body>
</html>

https://www.w3schools.com/jsref/jsref_link.asp以供参考，将为您提供更多指导。

希望您可以弄清楚如何使用提供的示例中的用户输入来定位元素以进行更新。

将Javascript值转换为链接？

3 个答案: