我发现效果是可以的,但是一旦分辨率不一样,就会效果偏下(请问怎么弄)谢谢!
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
margin: auto;
body {
width: 100vw;
height: 100vh;
position: relative;
}
div {
position: absolute;
left: 50%;
top: 50%;
width: 100px;
height: 100px;
margin-top: -50px;
margin-left: -50px;
}
width: calc(100vh);
height: calc(100vh);
如果body里只有这一个盒子的话,body{width:100vw;height:100vh;display:flex;justify-content:center;align-items: center;}