如果有多个type="radio"或type="checkbox"输入与同一个值相关联，则可以使用bind:group以及value属性。同一组中的单选按钮是互斥的；同一组中的复选框形成一个选定值的数组。
将bind:group={scoops}添加到单选按钮...
应用
<input
type="radio"
name="scoops"
value={number}
bind:group={scoops}
/>...并将bind:group={flavours}添加到复选框
应用
<input
type="checkbox"
name="flavours"
value={flavour}
bind:group={flavours}
/>1
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<script>
let scoops = $state(1);
let flavours = $state([]);
const formatter = new Intl.ListFormat('en', { style: 'long', type: 'conjunction' });</script>
<h2>Size</h2>
{#each [1, 2, 3] as number}<label>
<input
type="radio"
name="scoops"
value={number}/>
{number} {number === 1 ? 'scoop' : 'scoops'}</label>
{/each}<h2>Flavours</h2>
{#each ['cookies and cream', 'mint choc chip', 'raspberry ripple'] as flavour}<label>
<input
type="checkbox"
name="flavours"
value={flavour}/>
{flavour}</label>
{/each}{#if flavours.length === 0}<p>Please select at least one flavour</p>
{:else if flavours.length > scoops}<p>Can't order more flavours than scoops!</p>
{:else}<p>
You ordered {scoops} {scoops === 1 ? 'scoop' : 'scoops'} of {formatter.format(flavours)}</p>
{/if}