What is the method to automatically activate a "collapse" menu?

I am using the Bootstrap 4 theme on my website. I would like the menu called collapseMenuManage to automatically open when it is displayed. Below is the HTML code for my page:

<div id="modal_aside_first" class="modal fixed-right pl-0 fade" tabindex="-1" role="dialog">
  <div class="modal-dialog modal-dialog-aside" role="document">
    <div class="modal-content">
      <div class="modal-body d-flex flex-column">

        <div class="accordion list-group mb-0" id="accordionMenu">

          <div id="headingMenuMain">
            <a class="list-group-item list-group-item-action border-0 pl-2" data-toggle="collapse" href="#collapseMenuMain" aria-expanded="true" aria-controls="collapseMenuMain">
              <i class="bi bi-plus-circle bi-lg"></i> Main Menu
            </a>
          </div>
          <div id="collapseMenuMain" class="collapse show" aria-labelledby="headingMenuMain" data-parent="#accordionMenu">
            ...
          </div>

          <div id="headingMenuManage">
            <a class="list-group-item list-group-item-action border-0 pl-2" data-toggle="collapse" href="#collapseMenuManage" aria-expanded="false" aria-controls="collapseMenuManage">
              <i class="bi bi-plus-circle bi-lg"></i> Manage Your Account
            </a>
          </div>
          <div id="collapseMenuManage" class="collapse" aria-labelledby="headingMenuManage" data-parent="#accordionMenu">
            ...
          </div>

        </div>

      </div>
    </div>
  </div>
</div>

I tried this JavaScript code, but it did not have the desired effect:

$('#modal_aside_first').on('.collapse', function () { 
$(this).find("#collapseMenuManage .collapse").collapse("toggle");
});

Answer №1

When working with the jQuery on function, it is important to note that .collapse should be treated as a CSS selector, not an event. The appropriate event to use in this case is show.bs.modal, which is well-documented here. Additionally, make sure to select the correct CSS identifier, such as "#collapseMenuManage"...

$('#modal_aside_first').on('show.bs.modal', function () { 
  $(this).find("#collapseMenuManage").collapse("toggle");
})

Check out the demo here

Answer №2

It appears that you're looking for a way to automatically show content in Bootstrap 4. You can achieve this by using the class="collapse show".

For example:

<div class="card">
<div class="card-header" id="headingOne">
  <h5 class="mb-0">
    <button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
      Collapsible Group Item #1
    </button>
  </h5>
</div>

<div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
  <div class="card-body">
    Here goes your content to be shown automatically.
  </div>
</div>

For more detailed information, check out the documentation on collapsing elements in Bootstrap 4 here.

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