similiquedicta/packages/docs/components/Examples/undo/CustomUndoEditor/buttonStyles.module.css

A Plugin Architecture on top of Draft.JS

.button {
  border: 1px solid #bbb;
  height: 40px;
  color: #888;
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  background-color: #fff;
  margin-right: 10px;
}

.button:focus {
  background-color: #eee;
  color: #999;
  outline: 0; /* reset for :focus */
}

.button:hover {
  background-color: #eee;
  color: #999;
}

.button:active {
  background-color: #ddd;
  color: #777;
}

.button:disabled {
  background-color: #F5F5F5;
  color: #ccc;
}