fix

Author: dummdidumm

packages/svelte/src/compiler/phases/2-analyze/index.js

@@ -357,7 +357,11 @@ export function analyze_component(root, options) {
 		uses_component_bindings: false,
 		custom_element: options.customElement,
 		inject_styles: options.css === 'injected' || !!options.customElement,
-		accessors: options.customElement ? true : !!options.accessors,
+		accessors: options.customElement
+			? true
+			: !!options.accessors ||
+				// because $set method needs accessors
+				!!options.legacy?.componentApi,
 		reactive_statements: new Map(),
 		binding_groups: new Map(),
 		slot_names: new Set(),

packages/svelte/src/compiler/phases/3-transform/client/transform-client.js

@@ -245,11 +245,7 @@ export function client_component(source, analysis, options) {
 		return b.get(alias ?? name, [b.return(expression)]);
 	});
 
-	if (
-		analysis.accessors ||
-		// because $set method needs accessors
-		options.legacy.componentApi
-	) {
+	if (analysis.accessors) {
 		for (const [name, binding] of analysis.instance.scope.declarations) {
 			if (binding.kind !== 'prop' || name.startsWith('$$')) continue;