我有一个像这样的svg rect：
<svg class="legend-square">
<defs>
<pattern id="pattern1" width="3"
height="3" patternunits="userSpaceOnUse" patterntransform="rotate(-45)">
<rect width="2" height="3" transform="translate(0,0)" fill="purple"></rect>
</pattern>
</defs>
<rect width="12" height="12" fill="url(#pattern1)"></rect>
</svg>
解决方法
它工作正常.
如果代码段单独工作,但代码中包含它的div的大小显示为0x0,则查看：Why is my div’s height zero
它通常在设置浮动时引起.
<div>
<svg class="legend-square">
<defs>
<pattern id="pattern1" width="3" height="3" patternunits="userSpaceOnUse" patterntransform="rotate(-45)">
<rect width="2" height="3" transform="translate(0,0)" fill="purple"></rect>
</pattern>
</defs>
<rect width="12" height="12" fill="url(#pattern1)"></rect>
</svg>
</div>
