each ブロック内のプロパティにバインドすることもできます。
App
{#each todos as todo}
<li class:done={todo.done}>
<input
type="checkbox"
bind:checked={todo.done}
/>
<input
type="text"
placeholder="What needs to be done?"
bind:value={todo.text}
/>
</li>
{/each}previous next
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<script>
let todos = $state([
{ done: false, text: 'finish Svelte tutorial' }, { done: false, text: 'build an app' }, { done: false, text: 'world domination' }]);
function add() { todos.push({done: false,
text: ''
});
}
function clear() {todos = todos.filter((t) => !t.done);
}
let remaining = $derived(todos.filter((t) => !t.done).length);
</script>
<div class="centered">
<h1>todos</h1>
<ul class="todos">
{#each todos as todo} <li class:done={todo.done}><input
type="checkbox"
checked={todo.done}/>
<input
type="text"
placeholder="What needs to be done?"
value={todo.text}/>
</li>
{/each}</ul>
<p>{remaining} remaining</p> <button onclick={add}>Add new
</button>
<button onclick={clear}>Clear completed
</button>
</div>
<style>
.centered {max-width: 20em;
margin: 0 auto;
}
.done {opacity: 0.4;
}
li {display: flex;
}
input[type="text"] {flex: 1;
padding: 0.5em;
margin: -0.2em 0;
border: none;
}
</style>