我在SVG中嵌入了一张巨大的地图图像。 SVG是交互式的，因此，如果用户单击任一路径（在地图上同时勾勒出两个轮廓子区域），就会触发事件。
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</svg>
我希望剪切并保留隐藏路径之外的所有内容，直到直到紫色的“窗帘”朝中心增长，逐渐显示出未被路径剪切的图像部分。换句话说，在下面的演示中单击某个路径以触发动画后，动画过程中红色的屏幕部分仍应为地图。
这里是codepen demo。 您将不得不导航到可点击区域，该区域位于地图的右下角和顶部中间。
我知道可以通过在原始的裁剪后的SVG下一层复制SVG来完成，但这显然是多余的。
有人知道更简单的方法吗？
答案 0 :(得分：2)
如何使用分层蒙版？在面具中，任何黑色的东西都将被隐藏，任何白色的东西都将被显示。这个想法是动画面具内的svg形状。因此，例如，可以这样设置面罩：
<svg viewBox="0 0 300 300" >
<mask id="mask">
<!-- hide everything, black -->
<rect x="0" y="0" width="300" height="300" fill="black" />
<!-- the clip shape, white -->
<path fill="white" d="..." />
<!-- your blackout cover, white -->
<rect id="cover" x="0" y="0" width="300" height="300" fill="white" />
</mask>
<!-- your image -->
<image mask="url(#mask)" xlink:href="...">
</svg>
而不是使用div涂黑背景，而是对蒙版中的svg封面进行动画处理。