foreignObject

SVG elements make it possible to include external XML namespaces with graphic content rendered by different user agents. External graphic content included is subject to SVG conversion and composition.

<svg width="400px" height="300px" viewBox="0 0 400 300" xmlns="http://www.w3.org/2000/svg">
	<desc>The svg tag can write code and draw an image. Compared with bitmap data such as JPEG and PNG, even if it is enlarged, it can be displayed in a beautiful state without blurring.</desc>
	<switch>
		<foreignObject width="100" height="50" requiredExtensions="http://www.w3.org/1999/xhtml">
		<body xmlns="http://www.w3.org/1999/xhtml">
			<p>Here is a paragraph that requires word wrap</p>
		</body>
	</foreignObject>

	<text font-size="10" font-family="Verdana">
		<tspan x="10" y="10">Here is a paragraph that</tspan>
		<tspan x="10" y="20">requires word wrap.</tspan>
	</text>
</switch>
</svg>


<svg width="960px" height="1280px" viewBox="0 0 960 1280" xmlns="http://www.w3.org/2000/svg">
	<style>
	h1 {
		color:red;
	}
	</style>
	<g>
		<foreignObject x="0" y="0" width="100%" height="100%" requiredExtensions="http://www.w3.org/1999/xhtml">
		<body xmlns="http://www.w3.org/1999/xhtml">
			<p>Hello, world!</p>
		</body>
	</foreignObject>
</g>
</svg>

ん？　どういこと？