galaxy/Buttons/JohnnyCSilva_brave-cougar-40.html

<button class="btn">Button 
  <span class="icon-right"></span>
  <span class="icon-right after"></span>
</button>
<style>
/* From Uiverse.io by JohnnyCSilva - Tags: button */
button {
  font-family: 'Poppins', sans-serif;
  letter-spacing: 2px;
  background: none;
  color: white;
  position: relative;
  outline: none;
  border: none;
  height: 50px;
  width: 190px;
  font-size: 14px;
  z-index: 2;
  transition: 0.01s 0.23s ease-out all;
  overflow: hidden;
}

button:before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 55%;
  background: #303030;
  z-index: -1;
  transition: 0.3s ease-in all;
}

button:after {
  content: "";
  position: absolute;
  left: -5%;
  top: 5%;
  height: 90%;
  width: 5%;
  background: white;
  transition: 0.4s 0.02s ease-in all;
}

button:hover {
  cursor: pointer;
  color: transparent;
}

button:hover:before {
  left: 120%;
  width: 25%;
}

button:hover:after {
  left: 100%;
  width: 70%;
}

button:hover > .icon-right.after:after {
  left: -80px;
  color: white;
  transition: 0.2s 0.2s ease all;
}

button:hover > .icon-right.after:before {
  left: -104px;
  top: 14px;
  opacity: 0.2;
  color: white;
}

.icon-right {
  position: absolute;
  top: 0;
  right: 0;
}

.icon-right:after {
  font-family: "FontAwesome";
  content: "→";
  font-size: 24px;
  display: inline-block;
  position: relative;
  top: 26px;
  transform: translate3D(0, -55%, 0);
}

.icon-right.after:after {
  left: -250px;
  color: black;
  transition: 0.15s 0.25s ease left, 0.5s 0.05s ease color;
}

.icon-right.after:before {
  content: "Click Me!";
  position: absolute;
  left: -230px;
  top: 14px;
  opacity: 0;
  transition: 0.2s ease-in all;
}

.signature {
  position: fixed;
  font-family: sans-serif;
  font-weight: 100;
  bottom: 10px;
  left: 0;
  letter-spacing: 4px;
  font-size: 10px;
  width: 100%;
  text-align: center;
  color: white;
  text-transform: uppercase;
  text-decoration: none;
}
</style>