How to achieve reverse rounded corners with CSS? (code)

The content of this article is about how to achieve reverse rounded corners in CSS? (code), it has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Principle

Parent elementrelative, child elementabsolute, and then pass top, left, right, bottom to set the specific appearance position.

DOM structure

<div>
    <div></div>
</div>

CSS style

.wrapper-dashed{
    position: relative;
    height: 1px;
    width: 100%;
}
/*虚线实现*/
.dashed {
    border-top: 1px dashed #cccccc;
    height: 1px;
    overflow: hidden;
}
.dashed:before, .dashed:after{
    display: block;
    position: absolute;
    content: "";
    width:10px;
    height:10px;
    background-color:#f3f5f9;
    border-radius:50%;
    top: -5px;
}
.dashed:before{
    left: -5px;
}
.dashed:after{
    right: -5px;
}

Rendering

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