fix

packages/svelte/src/internal/client/dom/hydration.js

@@ -48,8 +48,7 @@ function get_hydrate_nodes(node, insert_text = false) {
 	/** @type {import('#client').TemplateNode[]} */
 	var nodes = [];
 
-	/** @type {null | Node} */
-	var current_node = node;
+	var current_node = /** @type {null | import('#client').TemplateNode} */ (node);
 
 	/** @type {null | string} */
 	var target_depth = null;
@@ -67,18 +66,18 @@ function get_hydrate_nodes(node, insert_text = false) {
 					if (insert_text && nodes.length === 0) {
 						var text = empty();
 						nodes.push(text);
-						text.before(current_node);
+						current_node.before(text);
 					}
 					return nodes;
 				} else {
-					nodes.push(/** @type {Text | Comment | Element} */ (current_node));
+					nodes.push(current_node);
 				}
 			}
 		} else if (target_depth !== null) {
-			nodes.push(/** @type {Text | Comment | Element} */ (current_node));
+			nodes.push(current_node);
 		}
 
-		current_node = current_node.nextSibling;
+		current_node = /** @type {null | import('#client').TemplateNode} */ (current_node.nextSibling);
 	}
 
 	return null;

packages/svelte/src/internal/client/render.js

@@ -114,7 +114,6 @@ export function createRoot() {
  * @returns {Exports}
  */
 export function mount(component, options) {
-	init_operations();
 	const anchor = empty();
 	options.target.appendChild(anchor);
 	// Don't flush previous effects to ensure order of outer effects stays consistent
@@ -139,8 +138,6 @@ export function mount(component, options) {
  * @returns {Exports}
  */
 export function hydrate(component, options) {
-	init_operations();
-
 	const container = options.target;
 	const first_child = /** @type {ChildNode} */ (container.firstChild);
 	const previous_hydrate_nodes = hydrate_nodes;
@@ -212,6 +209,8 @@ export function hydrate(component, options) {
  * @returns {Exports}
  */
 function _mount(Component, options) {
+	init_operations();
+
 	const registered_events = new Set();
 	const container = options.target;