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Question

I have 4 bootstrap accordions all collapsed. When clicking from navigation link ([href="#headingTwo"] etc...] I need to expand that referenced accordion only. [ AND close it if clicked on another navigation link ]

So the below code works but I'm repeating it 4 times.... Surely it can be simplified into one function?

// accordion 1
$('a.js-scroll-trigger[href="#headingTwo"]').on('click', function() {
  document.getElementById("collapseTwo").classList.add("show");
});

// accordion 2
$('a.js-scroll-trigger[href="#headingThree"]').on('click', function() {
  document.getElementById("collapseThree").classList.add("show");
});

// accordion 3
$[...]

// accordion 4
$[...]

Many thanks in advance.

Answer 1

It looks like your anchor share the same class .js-scroll-trigger , you could assign the click handler to all of them, within the handler you will get the target accordion item from the anchor's href , that it's the id of the accordion item, then you can just trigger the click handler of the item button like below.

href contains the accordion header id , the element contains as it's first child a button that triggers the expand/collapse

<h2 class="accordion-header" id="headingOne">
  <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
    Accordion Item #1
  </button>
</h2>

 $(function() { $("a.js-scroll-trigger").on("click", function() { var target = $(this).attr("href"); $(target).find("button").trigger("click"); }); });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/5.1.3/js/bootstrap.min.js"></script> <link href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.0.2/css/bootstrap.min.css" rel="stylesheet" /> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div> <a href="#headingOne" class="js-scroll-trigger">Item 1</a> <a href="#headingTwo" class="js-scroll-trigger">Item 2</a> <a href="#headingThree" class="js-scroll-trigger">Item 3</a> </div> <br> <div class="accordion" id="accordionExample"> <div class="accordion-item"> <h2 class="accordion-header" id="headingOne"> <button class="accordion-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" class="accordion-collapse collapse show" aria-labelledby="headingOne" data-bs-parent="#accordionExample"> <div class="accordion-body"> <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 class="accordion-item"> <h2 class="accordion-header" id="headingTwo"> <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"> Accordion Item #2 </button> </h2> <div id="collapseTwo" class="accordion-collapse collapse" aria-labelledby="headingTwo" data-bs-parent="#accordionExample"> <div class="accordion-body"> <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 class="accordion-item"> <h2 class="accordion-header" id="headingThree"> <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree"> Accordion Item #3 </button> </h2> <div id="collapseThree" class="accordion-collapse collapse" aria-labelledby="headingThree" data-bs-parent="#accordionExample"> <div class="accordion-body"> <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>