CSS hover如何作用在伪元素before上

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使用方法如下:

&::before {
    content: '';
    position: absolute;
    bottom: 0;
    width: 100%;
    border-bottom: 1px solid $line-color;
    transform: scale(0);
    transition: all .5s;
}
&:hover::before {
    transform: scale(1);
}

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转载自blog.csdn.net/weixin_41196185/article/details/82711461