HTML、JavaScript.如何在同一弹出窗口按钮上显示不同的信息

Question

我想知道如何在同一弹出窗口上显示不同的信息？

我使用这个例子：https://www.w3schools.com/howto/tryit.asp?filename=tryhow_css_modal

我发现要激活几个相同的按钮，我必须编辑JavaScript代码，将按钮转换为类。

<button class="myBtn">butoon 1</button>
<button class="myBtn">button 2</button>
<button class="myBtn">button 3</button>

JavaScript:

// Get the modal
var modal = document.getElementById('myModal');
// Get the button that opens the modal
var btns = document.getElementsByClassName("myBtn");
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks the button, open the modal 
for (var i = 0; i < btns.length; i++) {
btns[i].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";
}
}

但如果我创建几个相同的按钮并更改其中的信息，我会得到与第一个弹出窗口中相同的信息。我该如何解决这个问题？

Answer 1

使用此代码。
它对我很有效。

var modal = document.getElementById("myModal");
// Get the button that opens the modal
var btns = document.getElementsByClassName("myBtn");
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
var modalText = document.getElementById('modal-text');
// When the user clicks the button, open the modal 
for (var i = 0; i < btns.length; i++) {
btns[i].onclick = function(event) {
switch(event.target.innerHTML) {
case "button 1":
modalText.innerHTML = "First button Clicked";
break;
case "button 2":
modalText.innerHTML = "Second button Clicked";
break;
default:
modalText.innerHTML = "Third button Clicked";
}
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";
}
}

body {font-family: Arial, Helvetica, sans-serif;}
/* 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 {
background-color: #fefefe;
margin: auto;
padding: 20px;
border: 1px solid #888;
width: 80%;
}
/* The Close Button */
.close {
color: #aaaaaa;
float: right;
font-size: 28px;
font-weight: bold;
}
.close:hover,
.close:focus {
color: #000;
text-decoration: none;
cursor: pointer;
}

<button class="myBtn">button 1</button>
<button class="myBtn">button 2</button>
<button class="myBtn">button 3</button>
<!-- The Modal -->
<div id="myModal" class="modal">
<!-- Modal content -->
<div class="modal-content">
<span class="close">&times;</span>
<p id="modal-text">Some text in the Modal..</p>
</div>
</div>