chore: default remove_dom to false (#12267)

packages/svelte/src/internal/client/reactivity/deriveds.js

@@ -63,15 +63,16 @@ export function derived_safe_equal(fn) {
 }
 
 /**
- * @param {import('#client').Derived} signal
+ * @param {import('#client').Derived} derived
  * @returns {void}
  */
-function destroy_derived_children(signal) {
+function destroy_derived_children(derived) {
-	destroy_effect_children(signal);
+	destroy_effect_children(derived);
-	var deriveds = signal.deriveds;
+	var deriveds = derived.deriveds;
 
 	if (deriveds !== null) {
-		signal.deriveds = null;
+		derived.deriveds = null;
+
 		for (var i = 0; i < deriveds.length; i += 1) {
 			destroy_derived(deriveds[i]);
 		}

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

@@ -438,18 +438,17 @@ export function remove_reactions(signal, start_index) {
 
 /**
  * @param {import('#client').Reaction} signal
- * @param {boolean} [remove_dom]
+ * @param {boolean} remove_dom
  * @returns {void}
  */
-export function destroy_effect_children(signal, remove_dom = true) {
+export function destroy_effect_children(signal, remove_dom = false) {
-	let effect = signal.first;
+	var effect = signal.first;
-	signal.first = null;
+	signal.first = signal.last = null;
-	signal.last = null;
+
-	var sibling;
 	while (effect !== null) {
-		sibling = effect.next;
+		var next = effect.next;
 		destroy_effect(effect, remove_dom);
-		effect = sibling;
+		effect = next;
 	}
 }