Sync svelte docs (sveltejs#1104)

sync svelte docs

Co-authored-by: Rich-Harris <[email protected]>

Author: github-actions[bot]

apps/svelte.dev/content/docs/svelte/03-template-syntax/[email protected]

@@ -12,4 +12,4 @@ The `{@const ...}` tag defines a local constant.
 {/each}
 ```
 
-`{@const}` is only allowed as an immediate child of a block — `{#if ...}`, `{#each ...}`, `{#snippet ...}` and so on — or a `<Component />`.
+`{@const}` is only allowed as an immediate child of a block — `{#if ...}`, `{#each ...}`, `{#snippet ...}` and so on — a `<Component />` or a `<svelte:boundary`.

apps/svelte.dev/content/docs/svelte/03-template-syntax/18-class.md

@@ -72,6 +72,18 @@ The user of this component has the same flexibility to use a mixture of objects,
 </Button>
 ```
 
+Svelte also exposes the `ClassValue` type, which is the type of value that the `class` attribute on elements accept. This is useful if you want to use a type-safe class name in component props:
+
+```svelte
+<script lang="ts">
+	import type { ClassValue } from 'svelte/elements';
+
+	const props: { class: ClassValue } = $props();
+</script>
+
+<div class={['original', props.class]}>...</div>
+```
+
 ## The `class:` directive
 
 Prior to Svelte 5.16, the `class:` directive was the most convenient way to set classes on elements conditionally.

apps/svelte.dev/content/docs/svelte/98-reference/.generated/compile-errors.md

@@ -187,7 +187,7 @@ Cyclical dependency detected: %cycle%
 ### const_tag_invalid_placement
 
 ```
-`{@const}` must be the immediate child of `{#snippet}`, `{#if}`, `{:else if}`, `{:else}`, `{#each}`, `{:then}`, `{:catch}`, `<svelte:fragment>` or `<Component>`
+`{@const}` must be the immediate child of `{#snippet}`, `{#if}`, `{:else if}`, `{:else}`, `{#each}`, `{:then}`, `{:catch}`, `<svelte:fragment>`, `<svelte:boundary` or `<Component>`
 ```
 
 ### constant_assignment

apps/svelte.dev/content/docs/svelte/98-reference/21-svelte-motion.md

@@ -252,15 +252,6 @@ set target(v: T);
 get target(): T;
 ```
 
-<div class="ts-block-property-details"></div>
-</div>
-
-<div class="ts-block-property">
-
-```dts
-#private;
-```
-
 <div class="ts-block-property-details"></div>
 </div></div>
 

apps/svelte.dev/content/docs/svelte/98-reference/21-svelte-reactivity.md

@@ -101,15 +101,6 @@ class SvelteDate extends Date {/*…*/}
 constructor(...params: any[]);
 ```
 
-<div class="ts-block-property-details"></div>
-</div>
-
-<div class="ts-block-property">
-
-```dts
-#private;
-```
-
 <div class="ts-block-property-details"></div>
 </div></div>
 
@@ -138,15 +129,6 @@ constructor(value?: Iterable<readonly [K, V]> | null | undefined);
 set(key: K, value: V): this;
 ```
 
-<div class="ts-block-property-details"></div>
-</div>
-
-<div class="ts-block-property">
-
-```dts
-#private;
-```
-
 <div class="ts-block-property-details"></div>
 </div></div>
 
@@ -175,15 +157,6 @@ constructor(value?: Iterable<T> | null | undefined);
 add(value: T): this;
 ```
 
-<div class="ts-block-property-details"></div>
-</div>
-
-<div class="ts-block-property">
-
-```dts
-#private;
-```
-
 <div class="ts-block-property-details"></div>
 </div></div>
 
@@ -203,15 +176,6 @@ class SvelteURL extends URL {/*…*/}
 get searchParams(): SvelteURLSearchParams;
 ```
 
-<div class="ts-block-property-details"></div>
-</div>
-
-<div class="ts-block-property">
-
-```dts
-#private;
-```
-
 <div class="ts-block-property-details"></div>
 </div></div>
 
@@ -231,15 +195,6 @@ class SvelteURLSearchParams extends URLSearchParams {/*…*/}
 [REPLACE](params: URLSearchParams): void;
 ```
 
-<div class="ts-block-property-details"></div>
-</div>
-
-<div class="ts-block-property">
-
-```dts
-#private;
-```
-
 <div class="ts-block-property-details"></div>
 </div></div>
 

apps/svelte.dev/content/docs/svelte/98-reference/30-compiler-errors.md

@@ -192,7 +192,7 @@ Cyclical dependency detected: %cycle%
 ### const_tag_invalid_placement
 
 ```
-`{@const}` must be the immediate child of `{#snippet}`, `{#if}`, `{:else if}`, `{:else}`, `{#each}`, `{:then}`, `{:catch}`, `<svelte:fragment>` or `<Component>`
+`{@const}` must be the immediate child of `{#snippet}`, `{#if}`, `{:else if}`, `{:else}`, `{#each}`, `{:then}`, `{:catch}`, `<svelte:fragment>`, `<svelte:boundary` or `<Component>`
 ```
 
 ### constant_assignment