인라인 함수

<script>
	let m = {x:0, y:0};
</script>

<style>
	div {width: 100%; height: 100%;}
</style>

<div on:mousemove="{e => m = {x: e.clientX, y: e.clientY}}">
	mouse position ({m.x}, {m.y})
</div>