Stack Overflow Asked by m0a on December 9, 2021
I have a structure like so:
<header class="entry-header">
<div class="entry-before-title">
<h3 class="entry-title">
<div class="playTag">
<img/>
</div>
</h3>
</div>
</header>
<div class="entry-summary"></div>
<footer>
<p class="entry-byline"></p>
</footer>
And I have code for the playTag
class which is trying to toggle margin-left of entry-byline
:
$('.playTag').click(function() {
$(this).parent().parent().nextAll('.entry-byline').css({marginLeft:'200px'});
return false;
});
My problem is that this is not successfully targeting the entry-byline
nearest to playTag
. (It’s not targeting an entry-byline
at all actually). Can I please get help with targeting the nearest entry-byline
successfully in this click code?
I'd suggest working with a delegate listener so it also works for dynamically added elements.
Here's the vanilla JS version:
document.addEventListener('click', function(event) {
if (event.target.matches('.playTag')) {
const byLine = event.target
.closest('.entry-header')
.nextElementSibling
.nextElementSibling
.querySelector('.entry-byline');
byLine.classList.toggle('ml-200');
}
return false;
});
.ml-200 {
margin-left: 200px;
}
<header class="entry-header">
<div class="entry-before-title">
<h3 class="entry-title">
<div class="playTag">
playTag
</div>
</h3>
</div>
</header>
<div class="entry-summary"></div>
<footer>
<p class="entry-byline">entry-byline</p>
</footer>
<header class="entry-header">
<div class="entry-before-title">
<h3 class="entry-title">
<div class="playTag">
playTag
</div>
</h3>
</div>
</header>
<div class="entry-summary"></div>
<footer>
<p class="entry-byline">entry-byline</p>
</footer>
Answered by connexo on December 9, 2021
Your DOM traversal isn't quite right. You need to find the parent header
to the clicked .playTag
, which can be done more simply and robustly using closest()
instead of chaining parent()
calls.
From there you can retrieve the sibling footer
element and then find()
the .entry-byline
within that.
I would also suggest using CSS classes to amend the styling through JS. This is to avoid having to place CSS logic within JS, which is a violation of the Separation of Concerns principle.
$('.playTag').click(function() {
$(this).closest('header').siblings('footer').find('.entry-byline').toggleClass('foo');
});
.foo { margin-left: 200px; }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<header class="entry-header">
<div class="entry-before-title">
<h3 class="entry-title">
<div class="playTag">
playTag
<img/>
</div>
</h3>
</div>
</header>
<div class="entry-summary">entry-summary</div>
<footer>
<p class="entry-byline">entry-byline</p>
</footer>
Answered by Rory McCrossan on December 9, 2021
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