remove tag and add additional css class to data-sly-resource - aem

Question

Here's my code and I want to add another css class toggleable-content to the existing code:
<sly data-sly-resource="${'item' # resourceType='components/header'}"></sly>
This code would look something like this:
<section aria-label="aria label">
<ul class="row">
<li class="col">
<div class="body px-3">
<h2 class="h3">
body
</h2>
<p>body text</p>
</div>
</li>
</ul>
</section>
I want to remove section tag and add another css class toggleable-content to the <ul> tag. Below is what I'd like to achieve:
<ul class="row toggleable-content">
<li class="col">
<div class="body px-3">
<h2 class="h3">
body
</h2>
<p>body text</p>
</div>
</li>
</ul>
I was wondering how to use slightly to achieve the above? I tried something below but it doesn't work:
<sly data-sly-resource="${'item' # resourceType='components/header', cssClassName='toggleable-content'}"></sly>

Answer 1

Assuming the section markup is managed by the included resource (components/header) then you cannot do it directly. Indirectly, with AEM, you can pass a parameter (through request attributes) and retrieve it in the components/header model, then add the section conditionally (using data-sly-unwrap for example).
Or you re-organize your code and switch from resource inclusion to template calling and pass the parameter directly using data-sly-call.