- Joined
- Jul 1, 2010
- Messages
- 1,254
- Reaction score
- 359
Hello!
I have the following codes;
But the class "Content" does not change display to block when clicked on, I get this error:
I don't really understand why as I have tried this code via
and it works fine, but when I try to implement it on an site the error appears. what have I missed?
Ah!
Fixed it by changing the script a little ..
I have the following codes;
Code:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.collapsible {
background-color: #14324d;
color: white;
cursor: pointer;
padding: 18px;
width: 100%;
border: none;
text-align: left;
outline: none;
font-size: 15px;
}
.active, .collapsible:hover {
background-color: #5ba4e5;
}
.content {
padding: 0 18px;
display: none;
overflow: hidden;
background-color: #f1f1f1;
}
.collapsible:after {
content: '\02795'; /* Unicode character for "plus" sign (+) */
font-size: 13px;
color: white;
float: right;
margin-left: 5px;
}
.active:after {
content: "\2796"; /* Unicode character for "minus" sign (-) */
}
</style>
</head>
<body>
<h2>Collapsibles</h2>
<p>A Collapsible:</p>
<button type="button" class="collapsible">Open Collapsible</button>
<div class="content">
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</p>
</div>
<script>
var coll = document.getElementsByClassName("collapsible");
var i;
for (i = 0; i < coll.length; i++) {
coll[i].addEventListener("click", function() {
this.classList.toggle("active");
var content = this.nextElementSibling;
if (content.style.display === "block") {
content.style.display = "none";
} else {
content.style.display = "block";
}
});
}
</script>
</body>
</html>
But the class "Content" does not change display to block when clicked on, I get this error:
Code:
[COLOR="#FF0000"]Uncaught TypeError: Cannot read properties of null (reading 'style')[/COLOR]
I don't really understand why as I have tried this code via
You must be registered to see links
and it works fine, but when I try to implement it on an site the error appears. what have I missed?
Ah!
Fixed it by changing the script a little ..
Code:
<script>
var coll = document.getElementsByClassName("collapsible");
var i;
for (i = 0; i < collqa.length; i++) {
coll[i].addEventListener("click", function() {
this.classList.toggle("active");
const collection = document.getElementsByClassName("content");
if (collection[0].style.display === "block") {
collection[0].style.display = "none";
} else {
collection[0].style.display = "block";
}
});
}
</script>