docs: update transitions tutorial (sveltejs#8822)

fixes sveltejs#8820

Author: dummdidumm

documentation/tutorial/10-transitions/07-local-transitions/app-a/App.svelte renamed to documentation/tutorial/10-transitions/07-global-transitions/app-a/App.svelte

@@ -17,7 +17,7 @@
 
 {#if showItems}
 	{#each items.slice(0, i) as item}
-		<div transition:slide|local>
+		<div transition:slide|global>
 			{item}
 		</div>
 	{/each}

documentation/tutorial/10-transitions/07-local-transitions/app-b/App.svelte renamed to documentation/tutorial/10-transitions/07-global-transitions/app-b/App.svelte

@@ -0,0 +1,17 @@
+---
+title: Global transitions
+---
+
+Ordinarily, transitions will only play on elements when their direct containing block is added or destroyed. In the example here, toggling the visibility of the entire list does not apply transitions to individual list elements.
+
+Instead, we'd like transitions to not only play when individual items are added and removed with the slider but also when we toggle the checkbox.
+
+We can achieve this with a _global_ transition, which plays when _any_ block containing the transitions is added or removed:
+
+```svelte
+<div transition:slide|global>
+	{item}
+</div>
+```
+
+> In Svelte 3, transitions were global by default and you had to use the `|local` modifier to make them local.

documentation/tutorial/10-transitions/07-global-transitions/text.md

@@ -1,13 +1,11 @@
 import { readFileSync, writeFileSync } from 'node:fs';
 import path from 'node:path';
+import { fileURLToPath } from 'node:url';
 import { watch } from 'rollup';
 import serve from 'rollup-plugin-serve';
 import * as svelte from '../svelte/src/compiler/index.js';
 
-let __dirname = new URL('.', import.meta.url).pathname;
-if (process.platform === 'win32') {
-	__dirname = __dirname.slice(1); // else path.resolve fucks up
-}
+const __dirname = fileURLToPath(new URL('.', import.meta.url));
 
 /** @returns {import('rollup').Plugin}*/
 function create_plugin(ssr = false) {

documentation/tutorial/10-transitions/07-local-transitions/text.md

@@ -1,8 +1,9 @@
+import { fileURLToPath } from 'node:url';
 import { get_examples_data } from '../src/lib/server/examples/index.js';
 import fs from 'node:fs';
 
 const examples_data = get_examples_data(
-	new URL('../../../documentation/examples', import.meta.url).pathname
+	fileURLToPath(new URL('../../../documentation/examples', import.meta.url))
 );
 
 try {

packages/playground/start.js

@@ -210,7 +210,7 @@
 	}
 
 	onMount(() => {
-		console.log(get_old_new_ids_map());
+		console.log(get_old_new_ids_map()); // for debugging purposes in prod
 		goto(get_url_to_redirect_to(), { replaceState: true });
 	});
 </script>

sites/svelte.dev/scripts/generate_examples.js

@@ -3,11 +3,13 @@ import {
 	get_tutorial_data,
 	get_tutorial_list
 } from '$lib/server/tutorial/index.js';
-import { error } from '@sveltejs/kit';
+import { error, redirect } from '@sveltejs/kit';
 
 export const prerender = true;
 
 export async function load({ params }) {
+	if (params.slug === 'local-transitions') throw redirect(307, '/tutorial/global-transitions');
+
 	const tutorial_data = get_tutorial_data();
 	const tutorials_list = get_tutorial_list(tutorial_data);
 
@@ -24,7 +26,12 @@ export async function load({ params }) {
 
 export async function entries() {
 	const tutorials_list = get_tutorial_list(get_tutorial_data());
-	return tutorials_list
+	const slugs = tutorials_list
 		.map(({ tutorials }) => tutorials)
 		.flatMap((val) => val.map(({ slug }) => ({ slug })));
+
+	// to force redirect
+	slugs.push({ slug: 'local-transitions' });
+
+	return slugs;
 }