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svelte/documentation/tutorial/06-bindings/04-group-inputs/app-b/App.svelte

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<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} name="scoops" value={1} />
One scoop
</label>
<label>
<input type="radio" bind:group={scoops} name="scoops" value={2} />
Two scoops
</label>
<label>
<input type="radio" bind:group={scoops} name="scoops" value={3} />
Three scoops
</label>
<h2>Flavours</h2>
{#each menu as flavour}
<label>
<input type="checkbox" bind:group={flavours} 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 {join(flavours)}
</p>
{/if}