主卡组（{$deck.main.length}）

e.preventDefault()} ondrop={(e)=>onDrop("main", e)} class="card-grid main-deck"> {#each $deck.main as card}
{/each}

额外卡组（{$deck.extra.length}）

e.preventDefault()} ondrop={(e)=>onDrop("extra", e)} class="card-grid extra-deck"> {#each $deck.extra as card}
{/each}

副卡组（{$deck.side.length}）

e.preventDefault()} ondrop={(e)=>onDrop("side", e)} class="card-grid side-deck"> {#each $deck.side as card}
{/each}