svelte/test/runtime/samples/svg-with-style/main.html

<svg>
	<circle cx=50 cy=50 r=50/>
	<circle class='foo' cx=150 cy=50 r=50/>
	<circle class='{{x}}' cx=250 cy=50 r=50/>
</svg>

<style>
	circle {
		fill: red;
	}
</style>