A Pen by A Non Ymous.

FwBfk.markdown

FwBfk

A Pen by Anonasaurus Rex on CodePen.

License.

index.html

<button class="success" onclick="this.setAttribute('disabled', 'disabled');this.className='success loading';">SUBMIT</button>

style.css

button {
  position: relative;
  height: 50px;
  line-height: 50px;
  padding: 0px 30px;
  border: none;
  outline: none;
  border-radius: 2px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

button.success {
  background-color: #74a26e;
  color: white;
}

button.success:hover {
  background-color: #51774c;
}

button:disabled:hover,
button:disabled {
  cursor: default;
  background-color: #EEEEEE;
  color: #DDDDDD;
  text-shadow: 1px 1px 1px #FFFFFF;
  box-shadow: none;
}

button.loading {
  padding-right: 60px;
}

button.loading:before, button.loading:after {
  content: '';
  position: absolute;
  top: 50%;
  right: 0;
  bottom: 0;
  width: 20px;
  height: 20px;
  margin-top: -10px;
  margin-right: 30px;
  border: 2px solid #DDDDDD;
  border-radius: 50%;
  box-sizing: border-box;
}

button.loading:after {
  border-left-color: rgba(255, 255, 255, 0.8);
  -webkit-animation: rotate 0.8s linear infinite;
  -moz-animation: rotate 0.8s linear infinite;
  animation: rotate 0.8s linear infinite;
}

@-webkit-keyframes rotate {
  0% {
    -webkit-transform: rotate(0);
  }
  100% {
    -webkit-transform: rotate(360deg);
  }
}
@-moz-keyframes rotate {
  0% {
    -moz-transform: rotate(0);
  }
  100% {
    -moz-transform: rotate(360deg);
  }
}
@keyframes rotate {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}