1.position方法
- position+margin
.target {
position: absolute;
margin: auto;
top: 0;
left: 0;
bottom: 0;
right: 0;
}
- position+transform
.target {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
}
2.display方法
- table+vertical-align+text-align
.target {
display: table-cell;
text-align: center;
vertical-align: middle;
}
3.flex布局
- align-items+justify-content
.target {
display: flex;
justify-content: center;
align-items: center;
}
4.grid布局
- place-content
.target {
display: grid;
place-content: center;
}