using hover in scss code example

Example 1: scss hover

.class {
    margin:20px;
    &:hover {
        color:yellow;
    }
}

Example 2: scss hover

.button {
    &:hover {
      opacity: 1;
    }
    &:active {
      position: relative;
      top: 7px;
      box-shadow: none;
    }
}