parent {
display: table;
}
child {
display: table-cell;
vertical-align: middle;
}
parent {
display: flex;
align-items: center;
}
parent {
position: relative;
}
child {
position: absolute;
top: 50%;
transform: translateY(-50%);
}
parent:after {
content: '';
height: 100%;
vertical-align: middle;
width: 0;
}
child {
display: inline-block;
vertical-align: middle;
}