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Part 1 / Bindings / Select multiple

A select can have a multiple attribute, in which case it will populate an array rather than selecting a single value.

Returning to our earlier ice cream example, we can replace the checkboxes with a <select multiple>:

<h2>Flavours</h2>

<select multiple bind:value={flavours}>
	{#each menu as flavour}
		<option value={flavour}>
			{flavour}
		</option>
	{/each}
</select>

Press and hold the control key (or the command key on MacOS) for selecting multiple options.

Next: Lifecycle

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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} 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>
 
{#each menu as flavour}
	<label>
		<input type=checkbox bind:group={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}
initialising