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svelte/site/content/tutorial/06-bindings/09-each-block-bindings/app-a/App.svelte

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<script>
let todos = [
{ done: false, text: 'finish Svelte tutorial' },
{ done: false, text: 'build an app' },
{ done: false, text: 'world domination' }
];
function add() {
todos = todos.concat({ done: false, text: '' });
}
function clear() {
todos = todos.filter(t => !t.done);
}
$: remaining = todos.filter(t => !t.done).length;
</script>
<style>
.done {
opacity: 0.4;
}
</style>
<h1>Todos</h1>
{#each todos as todo}
<div class:done={todo.done}>
<input
type=checkbox
checked={todo.done}
>
<input
placeholder="What needs to be done?"
value={todo.text}
>
</div>
{/each}
<p>{remaining} remaining</p>
<button on:click={add}>
Add new
</button>
<button on:click={clear}>
Clear completed
</button>