i had problem with rotating icon while click on it. i tried to use key frame for rotating angle icon:

@keyframes rotateAngle {
    0%{
        transform: rotate(-180deg);
    }
}

and i used it in javascript function like this:

function changeAngle(e) {
  let angleIcon = e.currentTarget.querySelector("i");
  angleIcon.classList.toggle("fa-angle-up");
  angleIcon.style.animation = 'rotateAngle 0.6s'
}

it works, but only for first click.