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svelte/site/content/tutorial/06-bindings/07-multiple-select-bindings/app-b/App.svelte

54 lines
993 B

<script>
let scoops = 1;
let flavours = ['Mint choc chip'];
let menu = [
'Cookies and cream',
'Mint choc chip',
'Raspberry ripple'
];
function join(flavours) {
if (flavours.length === 1) return flavours[0];
return `${flavours.slice(0, -1).join(', ')} and ${flavours[flavours.length - 1]}`;
}
</script>
<h2>Size</h2>
<label>
<input type=radio bind:group={scoops} value={1}>
One scoop
</label>
<label>
<input type=radio bind:group={scoops} value={2}>
Two scoops
</label>
<label>
<input type=radio bind:group={scoops} value={3}>
Three scoops
</label>
<h2>Flavours</h2>
<select multiple bind:value={flavours}>
{#each menu as flavour}
<option value={flavour}>
{flavour}
</option>
{/each}
</select>
{#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 {join(flavours)}
</p>
{/if}