CSS中引用svg图片支持动态切换颜色的实现代码

<?xml version="1.0" encoding="UTF-8"?>
<svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://.w3./2000/svg" xmlns:xlink="http://.w3./1999/xlink">
    <title>窗口_返回</title>
    <g id="控件" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
        <g id="窗口_返回">
            <rect id="Rectangle-6" fill="#D8D8D8" opacity="0" x="0" y="0" width="24" height="24"></rect>
            <path d="M8.35417135,12.9957726 C8.13320936,12.7345458 8,12.3967967 8,12.0279541 C8,11.6586058 8.13357489,11.3204363 8.3550807,11.0590615 L8.3521103,11.0564202 L14.356041,4.51971371 L14.3599873,4.52318728 C14.635253,4.20288524 15.0434555,4 15.4990737,4 C16.3280124,4 17,4.67157288 17,5.5 C17,5.8870199 16.8533375,6.23980607 16.6125263,6.50587693 L16.6210783,6.51340439 L11.5390798,12.0228281 L16.5124905,17.3935277 C16.8121157,17.6677653 17,18.0619548 17,18.5 C17,19.3284271 16.3280124,20 15.4990737,20 C15.0262153,20 14.6044287,19.7814702 14.3293154,19.439953 L8.35278214,12.9970098 L8.35417135,12.9957726 L8.35417135,12.9957726 Z" id="Oval-43-Copy-3" fill="#808080"></path>
        </g>
    </g>
</svg>

import BackPng from '../../../../assets/images/back.svg';
<SVG className="backIcon" src={BackPng} />

&:hover {
    path {
      fill: #4ecb78;
    }
    .backContent {
      color: #4ecb78;
    }
  }
  &:active {
    path {
      fill: #2baf57;
    }
    .backContent {
      color: #2baf57;
    }
  }