.popper-tip {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    background: rgba(0,0,0,.8);
    color: white;
    font-weight: bold;
    padding: 4px 8px;
    font-size: 13px;
    border-radius: 4px;
    margin-bottom: 15px;
    text-align: center;
}
.popper-tip[data-show]{
    opacity: 1;
}