В
<div class="seats" data-id="1,3">
<span>1</span>
<span>2</span>
<span>3</span>
</div>
В текущем примере у 1 и 3
тоесть должно получится
<div class="seats" data-id="1,3">
<span class="free">1</span>
<span>2</span>
<span class="free">3</span>
</div>
Size: a a a
В
j
let seats = document.querySelector('.seats')
let seatsId = seats.dataset.id.split(',')
seats.querySelectorAll('span').forEach(seat => seatsId.includes(seat.textContent) && seat.classList.add('free'))
В
EI
В
NK
S
S
В
D
D
D
В
В
D
В
D
В