How can I find out what collapsable accordation is clicked?-CodePudding

I have the following Bootstrap 5 accordian, I need to know what panel is clicked on and currently visible. How can I do that? This is what I have so far:

<div  id="accordionExample">
    <div >
        <h2  id="headingOne">
            <button  type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                panel 1
            </button>
        </h2>
        <div id="collapseOne"  aria-labelledby="headingOne" data-bs-parent="#accordionExample">
            <div ></div>
        </div>
    </div>

    <div >
        <h2  id="headingTwo">
            <button  type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="true" aria-controls="headingTwo">
                panel 2
            </button>
        </h2>
        <div id="collapseTwo"  aria-labelledby="headingTwo" data-bs-parent="#accordionExample">
            <div ></div>
        </div>
    </div>
</div>

<script>
    $('#accordionExample').on('show.bs.collapse', function () {
        //call a service here 
        //alert("inne");
        alert($(this).text());
    });
</script>

CodePudding user response：

Here's a snippet using the example accordian HTML from the Bootstrap docs. Accordians use collapse; each of the collapse events will receive the event as a parameter. So if you add handlers for the shown and hidden events, you can then find the event.target, which will be what was clicked. And from that, with a little logic, you can work out what is currently visible, or hidden.

$('#accordionExample').on('shown.bs.collapse', function (e) {
    let clicked = $(e.target).attr('id');
    alert(clicked   ' was clicked and is now visible');
});

$('#accordionExample').on('hidden.bs.collapse', function (e) {
    let clicked = $(e.target).attr('id');
    alert(clicked   ' was clicked and is now hidden');
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg OMhuP IlRH9sENBO0LRn5q 8nbTov4 1p" crossorigin="anonymous"></script>


<div  id="accordionExample">
  <div >
    <h2  id="headingOne">
      <button  type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
        Accordion Item #1
      </button>
    </h2>
    <div id="collapseOne"  aria-labelledby="headingOne" data-bs-parent="#accordionExample">
      <div >
        <strong>This is the first item's accordion body.</strong> It is shown by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
      </div>
    </div>
  </div>
  <div >
    <h2  id="headingTwo">
      <button  type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
        Accordion Item #2
      </button>
    </h2>
    <div id="collapseTwo"  aria-labelledby="headingTwo" data-bs-parent="#accordionExample">
      <div >
        <strong>This is the second item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
      </div>
    </div>
  </div>
  <div >
    <h2  id="headingThree">
      <button  type="button" data-bs-toggle="collapse" data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
        Accordion Item #3
      </button>
    </h2>
    <div id="collapseThree"  aria-labelledby="headingThree" data-bs-parent="#accordionExample">
      <div >
        <strong>This is the third item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
      </div>
    </div>
  </div>
</div>