svelte/documentation/tutorial/16-special-elements/07-svelte-body/text.md

title
<svelte:body>

Similar to <svelte:window> and <svelte:document>, the <svelte:body> element allows you to listen for events that fire on document.body. This is useful with the mouseenter and mouseleave events, which don't fire on window.

Add the mouseenter and mouseleave handlers to the <svelte:body> tag:

<svelte:body
	on:mouseenter={handleMouseenter}
	on:mouseleave={handleMouseleave}
/>