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第467天 css在页面上画一个正方形，边长为页面宽度的一半
作者：GGLuckjiu
3+1官网
我也要出题
在div上添加一个类，这个类使得div显示在页面上是一个正方形，边长为页面宽度一半
.rect { width: 50vw; height: 50vw; }
Activity
shihongchun commentedon Jul 26, 2020
.rect {
width: 50vw;
height: 50vw;
}