Skip to main content
Basic Svelte
Introduction
Reactivity
Props
Logic
Events
Bindings
Classes and styles
Actions
Transitions
Advanced Svelte
Advanced reactivity
Reusing content
Motion
Advanced bindings
Advanced transitions
Context API
Special elements
<script module>
Next steps
Basic SvelteKit
Introduction
Routing
Loading data
Headers and cookies
Shared modules
Forms
API routes
$app/state
Errors and redirects
Advanced SvelteKit
Hooks
Page options
Link options
Advanced routing
Advanced loading
Environment variables
Conclusion

同じ値に関連している type="radio" input や type="checkbox" input が複数ある場合、value 属性とともに bind:group を使うことができます。同じグループの radio input は互いに排他的(exclusive)です。同じグループの checkbox input は選択した値の配列を構成します。

bind:group={scoops} を radio input に追加し…

App
<input
	type="radio"
	name="scoops"
	value={number}
	bind:group={scoops}
/>

…そして bind:group={flavours} を checkbox input に追加します:

App
<input
	type="checkbox"
	name="flavours"
	value={flavour}
	bind:group={flavours}
/>

Edit this page on GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
<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}