1px解决方案--集锦

没有废话，直接上代码

汇聚各种版本，持续更新中。。。。

1.sass

@charset "utf-8";
/**
 * @module 背景与边框
 * @description 为元素添加边框（包括1px边框）
 * @method border
 * @version 2.0.0
 * @param {String} $border-width 指定边框厚度（单位为px），默认值：1px，取值与`border-width`属性一致，不同方向代表边框位置 <2.0.0>
 * @param {String} $border-color 指定边框颜色 <2.0.0>
 * @param {String} $border-style 指定边框样式 <2.0.0>
 * @param {String} $radius 指定边框圆角半径，默认值：null <2.0.0>
 */
@mixin border($border-width: 1px, $border-color: map-get($base, border-color), $border-style: solid, $radius: null) {
    // 为边框位置提供定位参考
    position: relative;
    @if $border-width == null {
        $border-width: 0;
    }
    border-radius: $radius;
    &::after {
        // 用以解决边框layer遮盖内容
        pointer-events: none;
        position: absolute;
        z-index: 999;
        top: 0;
        left: 0;
        // fix当元素宽度出现小数时，边框可能显示不全的问题
        // overflow: hidden;
        content: "\0020";
        border-color: $border-color;
        border-style: $border-style;
        border-width: $border-width;
        // 适配dpr进行缩放
        @include responsive(retina1x) {
            width: 100%;
            height: 100%;
            @if $radius != null {
                border-radius: $radius;
            }
        }
        @include responsive(retina2x) {
            width: 200%;
            height: 200%;
            @include transform(scale(.5));
            @if $radius != null {
                border-radius: $radius * 2;
            }
        }
        @include responsive(retina3x) {
            width: 300%;
            height: 300%;
            @include transform(scale(.33333));
            @if $radius != null {
                border-radius: $radius * 3;
            }
        }
        @include transform-origin(0 0);
    }
}

2.stylus

border($border-width = 1px, $border-color = #ccc, $border-style = solid, $radius = 0)
  // 为边框位置提供定位参考
  position: relative;

  if $border-width == null
    $border-width: 0;

  border-radius: $radius;

  &::after
    // 用以解决边框layer遮盖内容
    pointer-events: none;
    position: absolute;
    z-index: 999;
    top: 0;
    left: 0;
    // fix当元素宽度出现小数时，边框可能显示不全的问题
    // overflow: hidden;
    content: "\0020";
    border-color: $border-color;
    border-style: $border-style;
    border-width: $border-width;
    
    // 适配dpr进行缩放
    @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)
      width: 100%;
      height: 100%;
      if $radius != null {
        border-radius: $radius;
      }
    
    @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)
      width: 200%;
      height: 200%;
      transform: scale(.5)
      if $radius != null {
        border-radius: $radius * 2;
      }
    
    @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)
      width: 300%;
      height: 300%;
      transform: scale(.33333)
      if $radius != null {
        border-radius: $radius * 3;
      }

    transform-origin: 0 0;

 3.react组件中

import styled from 'styled-components'

const border = ({
    component=null, 
    width='1px',
    style='solid',
    color='#ccc',
    radius=0
}) => {
  return styled(component) `
    position: relative;
    border-width: ${ width };
    border-radius: ${ radius + 'px' };
    &::after {
      pointer-events: none;
      position: absolute;
      z-index: 999;
      top: 0;
      left: 0;
      content: "";
      border-color: ${ color };
      border-style: ${ style };
      border-width: ${ width };

      @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) {
          width: 100%;
          height: 100%;
          border-radius: ${ radius + 'px' };
        };
      
      @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) {
          width: 200%;
          height: 200%;
          transform: scale(.5);
          border-radius: ${ radius * 2 + 'px'};
        };
      
      @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) {
          width: 300%;
          height: 300%;
          transform: scale(.33333);
          border-radius: ${ radius * 3 + 'px' }
        };

        transform-origin: 0 0;
    };
  `
}

export default border