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
Basic SvelteKit API routes Other handlers

同様に、他の HTTP verb のハンドラを追加できます。src/routes/todo/[id]/+server.js ファイルを作成し、src/lib/server/database.js の toggleTodo 関数と deleteTodo 関数を使用して todo の切り替えや削除を行う PUT と DELETE のハンドラを記述し、/todo/[id] ルート(route)を追加します:

src/routes/todo/[id]/+server
import * as database from '$lib/server/database.js';

export async function PUT({ params, request, cookies }) {
	const { done } = await request.json();
	const userid = cookies.get('userid');

	await database.toggleTodo({ userid, id: params.id, done });
	return new Response(null, { status: 204 });
}

export async function DELETE({ params, cookies }) {
	const userid = cookies.get('userid');

	await database.deleteTodo({ userid, id: params.id });
	return new Response(null, { status: 204 });
}

ブラウザに実際のデータを返す必要はないため、空の Response を 204 No Content ステータスで返しています。

これで、イベントハンドラからこのエンドポイントを操作できるようになりました:

src/routes/+page
<label>
	<input
		type="checkbox"
		checked={todo.done}
		onchange={async (e) => {
			const done = e.currentTarget.checked;

			await fetch(`/todo/${todo.id}`, {
				method: 'PUT',
				body: JSON.stringify({ done }),
				headers: {
					'Content-Type': 'application/json'
				}
			});
		}}
	/>
	<span>{todo.description}</span>
	<button
		aria-label="Mark as complete"
		onclick={async (e) => {
			await fetch(`/todo/${todo.id}`, {
				method: 'DELETE'
			});

			const todos = data.todos.filter((t) => t !== todo);

			data = { ...data, todos };
		}}
	></button>
</label>

Edit this page on GitHub

previous next
POST handlers
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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
<script>
	let { data } = $props();
</script>
 
<div class="centered">
	<h1>todos</h1>
 
	<label>
		add a todo:
		<input
			type="text"
			autocomplete="off"
			onkeydown={async (e) => {
				if (e.key !== 'Enter') return;
 
				const input = e.currentTarget;
				const description = input.value;
				
				const response = await fetch('/todo', {
					method: 'POST',
					body: JSON.stringify({ description }),
					headers: {
						'Content-Type': 'application/json'
					}
				});
 
				const { id } = await response.json();
 
				const todos = [...data.todos, {
					id,
					description
				}];
 
				data = { ...data, todos };
 
				input.value = '';
			}}
		/>
	</label>
 
	<ul class="todos">
		{#each data.todos as todo (todo.id)}
			<li>
				<label>
					<input
						type="checkbox"
						checked={todo.done}
						onchange={async (e) => {
							const done = e.currentTarget.checked;
 
							// TODO handle change
						}}
					/>
					<span>{todo.description}</span>
					<button
						aria-label="Mark as complete"
						onclick={async (e) => {
							// TODO handle delete
						}}
					></button>
				</label>
			</li>
		{/each}
	</ul>
</div>
 
<style>
	.centered {
		max-width: 20em;
		margin: 0 auto;
	}
 
	label {
		display: flex;
		width: 100%;
	}
 
	input[type="text"] {
		flex: 1;
	}
 
	span {
		flex: 1;
	}
 
	button {
		border: none;
		background: url(./remove.svg) no-repeat 50% 50%;
		background-size: 1rem 1rem;
		cursor: pointer;
		height: 100%;
		aspect-ratio: 1;
		opacity: 0.5;
		transition: opacity 0.2s;
	}
 
	button:hover {
		opacity: 1;
	}
</style>