CSS minification error: postcss-svgo: Error in parsing SVG: Unquoted attribute value

[jiaqiangmochn]

npm run build :
CSS minification error: postcss-svgo: Error in parsing SVG: Unquoted attribute value

尝试如下：
.mui-spinner:after
{
display: block;

width: 100%;
height: 100%;

content: '';

background-image: url("data:image/svg+xml;charset=utf-8,<svg viewBox=\'0 0 120 120\' xmlns=\'http://www.w3.org/2000/svg\' xmlns:xlink=\'http://www.w3.org/1999/xlink\'><defs><line id=\'l\' x1=\'60\' x2=\'60\' y1=\'7\' y2=\'27\' stroke=\'%236c6c6c\' stroke-width=\'11\' stroke-linecap=\'round\'/></defs><g><use xlink:href=\'%23l\' opacity=\'.27\'/><use xlink:href=\'%23l\' opacity=\'.27\' transform=\'rotate(30 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.27\' transform=\'rotate(60 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.27\' transform=\'rotate(90 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.27\' transform=\'rotate(120 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.27\' transform=\'rotate(150 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.37\' transform=\'rotate(180 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.46\' transform=\'rotate(210 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.56\' transform=\'rotate(240 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.66\' transform=\'rotate(270 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.75\' transform=\'rotate(300 60,60)\'/><use xlink:href=\'%23l\' opacity=\'.85\' transform=\'rotate(330 60,60)\'/></g></svg>");
background-repeat: no-repeat;
background-position: 50%;
background-size: 100%;

}

.mui-spinner-white:after
{
background-image: url("data:image/svg+xml;charset=utf-8,<svg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg\' xmlns:xlink='http://www.w3.org/1999/xlink\'><line id='l' x1='60' x2='60' y1='7' y2='27' stroke='%23fff' stroke-width='11' stroke-linecap='round'/><use xlink:href='%23l' opacity='.27'/><use xlink:href='%23l' opacity='.27' transform='rotate(30 60,60)'/><use xlink:href='%23l' opacity='.27' transform='rotate(60 60,60)'/><use xlink:href='%23l' opacity='.27' transform='rotate(90 60,60)'/><use xlink:href='%23l' opacity='.27' transform='rotate(120 60,60)'/><use xlink:href='%23l' opacity='.27' transform='rotate(150 60,60)'/><use xlink:href='%23l' opacity='.37' transform='rotate(180 60,60)'/><use xlink:href='%23l' opacity='.46' transform='rotate(210 60,60)'/><use xlink:href='%23l' opacity='.56' transform='rotate(240 60,60)'/><use xlink:href='%23l' opacity='.66' transform='rotate(270 60,60)'/><use xlink:href='%23l' opacity='.75' transform='rotate(300 60,60)'/><use xlink:href='%23l' opacity='.85' transform='rotate(330 60,60)'/>");
}

把单引号路径改成双引号，仍然报错同样错误。

[jiaqiangmochn]

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