How to make a highlight on a button?

Question

Layout

Hello everyone, how to make such an animation on the button? vel24.ru

Answer 1

By the link that you gave in the developer panel you can see. The after pseudo-element moves with animation:

@keyframes slideme
  0%
    left: -30px
    margin-left: 0px
  30%
    left: 110%
    margin-left: 80px
  100%
    left: 110%
    margin-left: 80px

Answer 2

https://codepen.io/UnluckySerivelha/pen/xzGpRd
Everything is on the site

Answer 3

The code is voluminous, I will not give it. Here is the code and demo for three different animated glitter buttons. There is also a hover and non-hover effect on pure CSS profi.spage.me .