!important within keyframes declarations is completely ignored in some browsers and therefore it should not be used to be consistent
among all browsers.
Noncompliant code example
@keyframes kf {
from { margin-top: 50px; }
50% { margin-top: 150px !important; } /* Noncompliant; ignored */
to { margin-top: 100px; }
}
Compliant solution
@keyframes kf {
from { margin-top: 50px; }
50% { margin-top: 150px; }
to { margin-top: 100px; }
}
