<script>
import {writable} from "better-svelte-writable";
const count = writable(0, { trackerCount: 3 });
const last1 = count.previous[0];
count.subscribe((n, [o1, o2, o3]) =>
console.log(`${o3} -> ${o2} -> ${o1} -> ${n}`));
</script>
<div>{$count}</div>
<div>{$last1}</div>
<button on:click={() => $count++}> + </button>
<button on:click={() => $count=0}>Reset</button>
<button on:click={() => $count--}> - </button>