Сделал в CSS: (Сделал по образцу этой темы
.username__shine {
background: linear-gradient(to right, #edc65c, #ff7600, #bd2828, #ed5cc7, #5c86ed, #edc65c);
background-size: 200% auto;
color: #edc65c;
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
text-fill-color: transparent;
-webkit-animation: shine 3s linear infinite alternate;
animation: shine 3s linear infinite alternate;
}
@-webkit-keyframes shine {
to {
background-position: 200% center;
}
}
@keyframes shine {
to {
background-position: 200% center;
}
}
