such as
// HTML
<div class="block" style="{width: bwidth + "px"}"></div>
// script
props: ["bwidth"]
// style
block:before{
content: "";
width: bwidth - 2 // vue
}block is passed in by the parent, and the width of its pseudo element before needs to be-2 based on it.
how to implement the code in vue
can be positioned absolute, relative to the parent element, and then calc (100%-2px) , with the position adjusted by itself.
block {
position: relative;
}
block::before{
position: absolute;
content: '';
width: calc(100% - 2px);
height: 100%;
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