const elem = document.querySelectorAll('.box');
for (let i = 0; i < elem.length; i++) {
elem[i].addEventListener('click', function () {
for (let x = 0; x < elem.length; x++) {
elem[x].style.background = 'black';
}
elem[i].style.background = 'red';
})
}
document.addEventListener('click', ({ target: t }) => {
if (t.classList.contains('box')) {
for (const n of document.querySelectorAll('.box')) {
n.style.background = n === t ? 'red' : 'black';
}
}
});
.box{
background:black;
}
.box.active{
background:red;
}
const elem = document.querySelectorAll('.box');
for (let i = 0; i < elem.length; i++)
elem[i].addEventListener('click', function (evt) {
var el = document.querySelector('.box.active');
if(el)
el.classList.remove("active");
evt.target.classList.add("active");
});