SVG形状透明度以纯色为背景 [英] SVG shape transparency with solid color as a background
问题描述
我有一个svg容器,我用它作为背景,里面画了一个圆圈
I have an svg container which I used as a background, and inside it a circle is drawn
基本上,这就是我所做的:
basically, this is what I've done:
<svg width="200" height="200" style="background-color:green">
<circle cx="100" cy="100" r="80" stroke="black" stroke-width="2" fill="transparent" />
</svg>
它会创建像这个
您可以看到圆圈是透明的,但它仍然具有svg标签的绿色背景,
如何我可以让圆圈真的透明,因此它可以显示为一个洞(在这种情况下它会是白色的,因为页面背景是白色的),为了清楚这是我要显示的内容:
You can see the circle is transparent but it still has the green background from the svg tag, how can I make the circle really transparent so it can appear as a hole (in this case it will be white since the page background is white), to make it clear this is what I want to display:
有什么办法可以解决这个问题?
Is there any way that can make this happen?
推荐答案
你可以使用面具。在这里你可以看到通过矩形切割的红色背景。
You could use a mask. Here you can see the red background cut through the rect.
<svg width="200" height="200" style="background-color:red">
<mask id="mask">
<rect fill="white" width="100%" height="100%"/>
<circle cx="100" cy="100" r="80" stroke="black" stroke-width="2" fill="black" />
</mask>
<rect mask="url(#mask)" fill="green" width="100%" height="100%"/>
</svg>
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