centre align in position absolute

1.child {
2    position: absolute;
3    top: 50%;  
4    left: 50%; 
5    transform: translate(-50%, -50%);
6}

1position: absolute;
2top: 50%;
3left: 50%;
4transform: translate(-50%, -50%);
5

1				left:50%;
2				transform:translate(-50%, -50%);