document local transitions

Author: Rich-Harris

site/content/tutorial/10-transitions/07-local-transitions/app-a/App.svelte

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+<script>
+	import { slide } from 'svelte/transition';
+
+	let showItems = true;
+	let i = 5;
+	let items = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten'];
+</script>
+
+<style>
+	div {
+		padding: 0.5em 0;
+		border-top: 1px solid #eee;
+	}
+</style>
+
+<label>
+	<input type="checkbox" bind:checked={showItems}>
+	show list
+</label>
+
+<label>
+	<input type="range" bind:value={i} max=10>
+
+</label>
+
+{#if showItems}
+	{#each items.slice(0, i) as item}
+		<div transition:slide>
+			{item}
+		</div>
+	{/each}
+{/if}

site/content/tutorial/10-transitions/07-local-transitions/app-b/App.svelte

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+<script>
+	import { slide } from 'svelte/transition';
+
+	let showItems = true;
+	let i = 5;
+	let items = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten'];
+</script>
+
+<style>
+	div {
+		padding: 0.5em 0;
+		border-top: 1px solid #eee;
+	}
+</style>
+
+<label>
+	<input type="checkbox" bind:checked={showItems}>
+	show list
+</label>
+
+<label>
+	<input type="range" bind:value={i} max=10>
+
+</label>
+
+{#if showItems}
+	{#each items.slice(0, i) as item}
+		<div transition:slide|local>
+			{item}
+		</div>
+	{/each}
+{/if}

site/content/tutorial/10-transitions/07-local-transitions/text.md

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+---
+title: Local transitions
+---
+
+Ordinarily, transitions will play on elements when any container block is added or destroyed. In the example here, toggling the visibility of the entire list also applies transitions to individual list elements.
+
+Instead, we'd like transitions to play only when individual items are added and removed — on other words, when the user drags the slider.
+
+We can achieve this with a *local* transition, which only plays when the immediate parent block is added or removed:
+
+```html
+<div transition:slide|local>
+	{item}
+</div>
+```