document.addEventListener('click', e => {
let t = e.target;
for (; t !== document && !t.matches('.more-btn'); t = t.parentNode) ;
for (const n of document.getElementsByClassName('more-btn')) {
n.classList.toggle('active', n === t && !n.classList.contains('active'));
}
// или
document.querySelectorAll('.more-btn').forEach(function(n) {
n.classList[n === this ? 'toggle' : 'remove']('active');
}, e.target.closest('.more-btn'));
});