移动端1px的解决办法之styled

做项目的时候总结了一个styled中解决移动端项目1px像素线的问题，封装了一个函数，大家可以直接使用，很方便。


 1 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