How to add class to parent elements?

Question

For the span element with the class "arrows", I'm trying to add a class to the div with the class "collapse" from its parents and also an attribute to the div with the class "navbar-toggler".

I tried the following code:

$(function() {
  $('.arrows[aria-expanded="true"]').closest('.navbar-toggler').setAttribute("aria-expanded", true);
});

$(function() {
  $('.arrows[aria-expanded="true"]').parents('.collapse').addClass('in')
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<div class="navbar-toggler collapse-icons" data-toggle="collapse" data-target="#exCollapsingNavbar10">
  <i class="material-icons add"></i>
  <i class="material-icons remove"></i>
</div>

<div class="collapse" id="exCollapsingNavbar10">
  <ul class="category-sub-menu">
    <li data-depth="1" data-id="11">
      <a class="category-sub-link" href=" ">Educație Arduino</a>
      <span class="arrows" data-toggle="collapse" data-target="#exCollapsingNavbar11" aria-expanded="true">

You miss the reference on which to target. If there are multiple ones, you need to refer to this (as in the element clicked) and then move the way up. — Dorvalla
– Dorvalla, Commented May 24, 2023 at 11:03
Did you see the error in the console? setAttribute() is a native JavaScript method. You can't invoke it on a jQuery object. Use attr(). — isherwood
– isherwood, Commented May 24, 2023 at 12:57
Note that you don't need multiple ready() functions. Put all your code in one. — isherwood
– isherwood, Commented May 24, 2023 at 12:58
I had no errors in console, but I'll keep that in mind, thank you! I'm new to this and still learning — Stefana
– Stefana, Commented May 25, 2023 at 6:16

isherwood · Accepted Answer · 2023-05-24 12:56:21Z

1

$('.arrows[aria-expanded=true]')
  .parents('.collapse')
  .addClass('in')
  .prev()
  .attr('aria-expanded', true);

.in {
  background: yellow;
}

.navbar-toggler[aria-expanded=true] {
  background: red;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<div class="navbar-toggler collapse-icons" data-toggle="collapse" data-target="#exCollapsingNavbar10">
  <i class="material-icons add"></i>
  <i class="material-icons remove"></i>
</div>

<div class="collapse" id="exCollapsingNavbar10">
  <ul class="category-sub-menu">
    <li data-depth="1" data-id="11">
      <a class="category-sub-link" href=" ">Educație Arduino</a>
      <span class="arrows" data-toggle="collapse" data-target="#exCollapsingNavbar11" aria-expanded="true"></span
    </li>
  </ul>
</div>

edited May 24, 2023 at 12:56

isherwood

61.4k16 gold badges122 silver badges173 bronze badges

answered May 24, 2023 at 11:01

Alexander Nenashev

26.1k3 gold badges11 silver badges29 bronze badges

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