document.addEventListener('click', (event) => {

if (event.target.dataset.expandContent) {
    const expander = event.target.dataset
    const sibling = event.target.nextElementSibling

    if (sibling.classList.contains('expanded')) {
        sibling.classList.remove('expanded')
        sibling.classList.add('collapsed')
    } else {
        sibling.classList.add('expanded')
        sibling.classList.remove('collapsed')
    }
}

})