<select> 元素可以具有 multiple 属性，在这种情况下它将填充数组而不是选择单个值。
¥A <select> element can have a multiple attribute, in which case it will populate an array rather than selecting a single value.
用 <select multiple> 替换复选框：
¥Replace the checkboxes with a <select multiple>:
App
<h2>Flavours</h2>
<select multiple bind:value={flavours}>
{#each ['cookies and cream', 'mint choc chip', 'raspberry ripple'] as flavour}
<option>{flavour}</option>
{/each}
</select>请注意，我们可以省略 <option> 上的 value 属性，因为该值与元素的内容相同。
¥Note that we’re able to omit the value attribute on the <option>, since the value is identical to the element’s contents.
按住
control键（或 MacOS 上的command键）可选择多个选项。¥[!NOTE] Press and hold the
controlkey (or thecommandkey on MacOS) to select multiple options.
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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} bind:group={scoops}/>
{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} bind:group={flavours}/>
{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}