Bootstrap 5 Nested Accordion

If you’re looking for an easy way to display nested accordions on your website, this Bootstrap 5 Nested Accordion code snippet is just what you need. With Bootstrap’s powerful accordion component, you can create collapsible sections that organize and present content in a clean and user-friendly manner. This code showcases a nested accordion structure, where each accordion item can contain additional accordion items within it.

How to Create Bootstrap 5 Nested Accordion

First of all, load the Bootstrap 5 CSS by adding the following CDN link to the head tag of your website.

<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/css/bootstrap.min.css'>

Create the HTML structure for nested accordion as follows:

<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">

                <div class="accordion" id="sub-accordionExample">
                    <div class="accordion-item">
                        <h2 class="accordion-header" id="sub-headingOne">
                            <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#sub-collapseOne" aria-expanded="true" aria-controls="collapseOne">
                                Accordion Item #1
                            </button>
                        </h2>
                        <div id="sub-collapseOne" class="accordion-collapse collapse show" aria-labelledby="sub-headingOne" data-bs-parent="#sub-accordionExample">
                            <div class="accordion-body">
                                <strong>This is the first 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="sub-headingTwo">
                            <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#sub-collapseTwo" aria-expanded="false" aria-controls="sub-collapseTwo">
                                Accordion Item #2
                            </button>
                        </h2>
                        <div id="sub-collapseTwo" class="accordion-collapse collapse" aria-labelledby="sub-headingTwo" data-bs-parent="#sub-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>
            </div>
        </div>

    </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>

Finally, load the Bootstrap 5 JS by adding the following CDN link before closing the body tag:

<script src='https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.1.3/js/bootstrap.min.js'></script>

That’s all! hopefully, you have successfully created a nested accordion. If you have any questions or suggestions, feel free to comment below.