JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <p class="expand" id="expand-1">more 1...</p>
</div>
<div class="expandable" id="expandable-1">
    <p>1. This is the content that was hidden before, but now is... Well, visible!"</p>
</div>
<div>
    <p class="expand" id="expand-2">more 2...</p>
</div>
<div class="expandable" id="expandable-2">
    <p>2. This is the content that was hidden before, but now is... Well, visible!"</p>
</div>

CSS

.expand {
    font-weight: bold;
    font-style: italic;
    font-size: 12px;
    cursor: pointer;
}
.expandable {
    display:none;
}
div {
    margin: 10px;
}

JavaScript

$('.expand').click(function(){
    target_num = $(this).attr('id').split('-')[1];
    content_id = '#expandable-'.concat(target_num);
    $(content_id).slideToggle('fast');
});