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svelte/site/content/tutorial/09-motion/02-spring/app-a/App.svelte

31 lines
760 B

<script>
import { writable } from 'svelte/store';
let coords = writable({ x: 50, y: 50 });
let size = writable(10);
</script>
<style>
svg { width: 100%; height: 100%; margin: -8px; }
circle { fill: #ff3e00 }
</style>
<div style="position: absolute; right: 1em;">
<label>
<h3>stiffness ({coords.stiffness})</h3>
<input bind:value={coords.stiffness} type="range" min="0" max="1" step="0.01">
</label>
<label>
<h3>damping ({coords.damping})</h3>
<input bind:value={coords.damping} type="range" min="0" max="1" step="0.01">
</label>
</div>
<svg
on:mousemove="{e => coords.set({ x: e.clientX, y: e.clientY })}"
on:mousedown="{() => size.set(30)}"
on:mouseup="{() => size.set(10)}"
>
<circle cx={$coords.x} cy={$coords.y} r={$size}/>
</svg>