appease typescript

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

@@ -293,7 +293,9 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
 		item = items.get(key);
 
 		if (item === undefined) {
-			var child_anchor = current ? current.e.nodes.start : anchor;
+			var child_anchor = current
+				? /** @type {import('#client').EffectNodes} */ (current.e.nodes).start
+				: anchor;
 
 			prev = create_item(
 				child_anchor,
@@ -514,10 +516,12 @@ function create_item(anchor, state, prev, next, value, key, index, render_fn, fl
  * @param {Text | Element | Comment} anchor
  */
 function move(item, next, anchor) {
-	var end = item.next ? item.next.e.nodes.start : anchor;
-	var dest = next ? next.e.nodes.start : anchor;
+	var end = item.next
+		? /** @type {import('#client').EffectNodes} */ (item.next.e.nodes).start
+		: anchor;
 
-	var node = item.e.nodes.start;
+	var dest = next ? /** @type {import('#client').EffectNodes} */ (next.e.nodes).start : anchor;
+	var node = /** @type {import('#client').EffectNodes} */ (item.e.nodes).start;
 
 	while (node !== end) {
 		var next_node = /** @type {import('#client').TemplateNode} */ (node.nextSibling);

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

@@ -26,6 +26,10 @@ export function template(content, flags) {
 	/** @type {Node} */
 	var node;
 
+	/**
+	 * Whether or not the first item is a text/element node. If not, we need to
+	 * create an additional comment node to act as `effect.nodes.start`
+	 */
 	var has_start = !content.startsWith('<!>');
 
 	return () => {
@@ -89,6 +93,10 @@ export function template_with_script(content, flags) {
  */
 /*#__NO_SIDE_EFFECTS__*/
 export function ns_template(content, flags, ns = 'svg') {
+	/**
+	 * Whether or not the first item is a text/element node. If not, we need to
+	 * create an additional comment node to act as `effect.nodes.start`
+	 */
 	var has_start = !content.startsWith('<!>');
 
 	var is_fragment = (flags & TEMPLATE_FRAGMENT) !== 0;

packages/svelte/src/internal/client/reactivity/types.d.ts

@@ -34,12 +34,14 @@ export interface Derived<V = unknown> extends Value<V>, Reaction {
 	deriveds: null | Derived[];
 }
 
+export interface EffectNodes {
+	start: TemplateNode;
+	end: TemplateNode;
+}
+
 export interface Effect extends Reaction {
 	parent: Effect | null;
-	nodes: null | {
-		start: TemplateNode;
-		end: TemplateNode;
-	};
+	nodes: null | EffectNodes;
 	/** The associated component context */
 	ctx: null | ComponentContext;
 	/** The effect function */