drive-by fix

packages/svelte/src/internal/client/dom/blocks/snippet.js

@@ -4,24 +4,30 @@ import { untrack } from '../../runtime.js';
 import { create_block } from './utils.js';
 
 /**
- * @param {() => Function | null | undefined} get_snippet
- * @param {Node} node
+ * @template {(node: import('#client').TemplateNode, ...args: any[]) => import('#client').Dom} SnippetFn
+ * @param {() => SnippetFn | null | undefined} get_snippet
+ * @param {import('#client').TemplateNode} node
  * @param {(() => any)[]} args
  * @returns {void}
  */
 export function snippet(get_snippet, node, ...args) {
 	const block = create_block();
 
+	/** @type {SnippetFn | null | undefined} */
+	var snippet_fn;
+
 	render_effect(() => {
-		// Only rerender when the snippet function itself changes,
-		// not when an eagerly-read prop inside the snippet function changes
-		const snippet = get_snippet();
-		if (snippet) {
-			untrack(() => snippet(node, ...args));
+		if (snippet_fn === (snippet_fn = get_snippet())) return;
+
+		if (snippet_fn) {
+			// Only rerender when the snippet function itself changes,
+			// not when an eagerly-read prop inside the snippet function changes
+			var dom = untrack(() => /** @type {SnippetFn} */ (snippet_fn)(node, ...args));
 		}
+
 		return () => {
-			if (block.d !== null) {
-				remove(block.d);
+			if (dom !== undefined) {
+				remove(dom);
 			}
 		};
 	}, block);