.spinner {
    display: inline-block;
    opacity: 0;
    width: 0;
    -webkit-transition: opacity 0.25s, width 0.25s;
    -moz-transition: opacity 0.25s, width 0.25s;
    -o-transition: opacity 0.25s, width 0.25s;
    transition: opacity 0.25s, width 0.25s;
}

.has-spinner.active {
    cursor:progress;
}

.has-spinner.active .spinner {
    opacity: 1;
    width: auto;
}

.has-spinner.btn.active .spinner {
    min-width: 20px;
}