You can use transitions instead:
.successfully-saved.hide-opacity{ opacity: 0; } .successfully-saved { color: #FFFFFF; text-align: center; -webkit-transition: opacity 3s ease-in-out; -moz-transition: opacity 3s ease-in-out; -ms-transition: opacity 3s ease-in-out; -o-transition: opacity 3s ease-in-out; opacity: 1; }