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css的border一像素

@charset “utf-8”;
.border,
.border-top,
.border-right,
.border-bottom,
.border-left,
.border-topbottom,
.border-rightleft,
.border-topleft,
.border-rightbottom,
.border-topright,
.border-bottomleft {
position: relative;
}
.border::before,
.border-top::before,
.border-right::before,
.border-bottom::before,
.border-left::before,
.border-topbottom::before,
.border-topbottom::after,
.border-rightleft::before,
.border-rightleft::after,
.border-topleft::before,
.border-topleft::after,
.border-rightbottom::before,
.border-rightbottom::after,
.border-topright::before,
.border-topright::after,
.border-bottomleft::before,
.border-bottomleft::after {
content: “\\0020”;
overflow: hidden;
position: absolute;
}
/* border

  • 因,边框是由伪元素区域遮盖在父级
  • 故,子级若有交互,需要对子级设置
  • 定位 及 z轴
    /
    .border::before {
    box-sizing: border-box;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    border: 1px solid #eaeaea;
    transform-origin: 0 0;
    }
    .border-top::before,
    .border-bottom::before,
    .border-topbottom::before,
    .border-topbottom::after,
    .border-topleft::before,
    .border-rightbottom::after,
    .border-topright::before,
    .border-bottomleft::before {
    left: 0;
    width: 100%;
    height: 1px;
    }
    .border-right::before,
    .border-left::before,
    .border-rightleft::before,
    .border-rightleft::after,
    .border-topleft::after,
    .border-rightbottom::before,
    .border-topright::after,
    .border-bottomleft::after {
    top: 0;
    width: 1px;
    height: 100%;
    }
    .border-top::before,
    .border-topbottom::before,
    .border-topleft::before,
    .border-topright::before {
    border-top: 1px solid #eaeaea;
    transform-origin: 0 0;
    }
    .border-right::before,
    .border-rightbottom::before,
    .border-rightleft::before,
    .border-topright::after {
    border-right: 1px solid #eaeaea;
    transform-origin: 100% 0;
    }
    .border-bottom::before,
    .border-topbottom::after,
    .border-rightbottom::after,
    .border-bottomleft::before {
    border-bottom: 1px solid #eaeaea;
    transform-origin: 0 100%;
    }
    .border-left::before,
    .border-topleft::after,
    .border-rightleft::after,
    .border-bottomleft::after {
    border-left: 1px solid #eaeaea;
    transform-origin: 0 0;
    }
    .border-top::before,
    .border-topbottom::before,
    .border-topleft::before,
    .border-topright::before {
    top: 0;
    }
    .border-right::before,
    .border-rightleft::after,
    .border-rightbottom::before,
    .border-topright::after {
    right: 0;
    }
    .border-bottom::before,
    .border-topbottom::after,
    .border-rightbottom::after,
    .border-bottomleft::after {
    bottom: 0;
    }
    .border-left::before,
    .border-rightleft::before,
    .border-topleft::after,
    .border-bottomleft::before {
    left: 0;
    }
    @media (max–moz-device-pixel-ratio: 1.49), (-webkit-max-device-pixel-ratio: 1.49), (max-device-pixel-ratio: 1.49), (max-resolution: 143dpi), (max-resolution: 1.49dppx) {
    / 默认值,无需重置 */
    }
    @media (min–moz-device-pixel-ratio: 1.5) and (max–moz-device-pixel-ratio: 2.49), (-webkit-min-device-pixel-ratio: 1.5) and (-webkit-max-device-pixel-ratio: 2.49), (min-device-pixel-ratio: 1.5) and (max-device-pixel-ratio: 2.49), (min-resolution: 144dpi) and (max-resolution: 239dpi), (min-resolution: 1.5dppx) and (max-resolution: 2.49dppx) {
    .border::before {
    width: 200%;
    height: 200%;
    transform: scale(.5);
    }
    .border-top::before,
    .border-bottom::before,
    .border-topbottom::before,
    .border-topbottom::after,
    .border-topleft::before,
    .border-rightbottom::after,
    .border-topright::before,
    .border-bottomleft::before {
    transform: scaleY(.5);
    }
    .border-right::before,
    .border-left::before,
    .border-rightleft::before,
    .border-rightleft::after,
    .border-topleft::after,
    .border-rightbottom::before,
    .border-topright::after,
    .border-bottomleft::after {
    transform: scaleX(.5);
    }
    }
    @media (min–moz-device-pixel-ratio: 2.5), (-webkit-min-device-pixel-ratio: 2.5), (min-device-pixel-ratio: 2.5), (min-resolution: 240dpi), (min-resolution: 2.5dppx) {
    .border::before {
    width: 300%;
    height: 300%;
    transform: scale(.33333);
    }
    .border-top::before,
    .border-bottom::before,
    .border-topbottom::before,
    .border-topbottom::after,
    .border-topleft::before,
    .border-rightbottom::after,
    .border-topright::before,
    .border-bottomleft::before {
    transform: scaleY(.33333);
    }
    .border-right::before,
    .border-left::before,
    .border-rightleft::before,
    .border-rightleft::after,
    .border-topleft::after,
    .border-rightbottom::before,
    .border-topright::after,
    .border-bottomleft::after {
    transform: scaleX(.33333);
    }
    }
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