JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" class="button">Кнопка</a>

CSS

@import url(https://fonts.googleapis.com/css?family=Open+Sans:400,600&subset=latin,cyrillic-ext);
.button {
  display: inline-block;
  padding: 16px 29px;
  margin-bottom: 0px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.42857;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  -moz-user-select: none;
  background-image: none;
  text-decoration: none;
  border: 1px solid #d6dce5;
  border-radius: 3px;
  color: #000;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  -webkit-transition-property: color;
          transition-property: color;
  -webkit-transition-duration: 0.3s;
          transition-duration: 0.3s;
  font-family: 'Open Sans', sans-serif;
}
.button:before {
  content: "";
  display: block;
  position: absolute;
  z-index: -1;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: #eef3fa;
  -webkit-transform: scaleX(0);
          transform: scaleX(0);
  -webkit-transform-origin: 0 50%;
          transform-origin: 0 50%;
  -webkit-transition-property: -webkit-transform;
          transition-property: transform;
  -webkit-transition-duration: 0.3s;
          transition-duration: 0.3s;
  -webkit-transition-timing-function: ease-out;
          transition-timing-function: ease-out;
}

.button:hover:before {
  -webkit-transform: scaleX(1);
          transform: scaleX(1);
}