const button = document.querySelectorAll('.button')
const item = document.querySelectorAll('.item')
function buttonClick() {
button.forEach((el, index) => {
el.addEventListener('click', () => {
button.forEach(elem => {
elem.classList.toggle('yellow');
elem.classList.toggle('red');
});
item.forEach((elem, id) => {
elem.style.display = index === id ? 'block' : 'none';
})
});
})
}
buttonClick();