我有一些外部g元素和一个带有绿色填充颜色的内部元素，它是地图SVG路径的一部分。我设法选择内部路径元素，但无法选择其填充属性来获取其颜色。如何选择第一个内部路径元素的填充颜色？
选择第一个路径元素：
var item = $('.datamap path')
我试图获得填充，这会产生以下异常：
$(item).attr('fill')
未捕获DOMException：无法执行＆＃39; querySelector＆＃39; on＆＃39; Document＆＃39;：＆＃39; [object SVGPathElement]＆＃39;不是有效的选择器。
这是我的DOM的样子：
<g id="" class="datamaps-subunits">
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