tweak

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

@@ -17,35 +17,35 @@ import { async_derived, derived, derived_safe_equal } from './deriveds.js';
 export function flatten(sync, async, fn) {
 	const d = is_runes() ? derived : derived_safe_equal;
 
-	if (async.length > 0) {
-		var batch = current_batch;
-		var parent = /** @type {Effect} */ (active_effect);
+	if (async.length === 0) {
+		fn(sync.map(d));
+		return;
+	}
 
-		var restore = capture();
+	var batch = current_batch;
+	var parent = /** @type {Effect} */ (active_effect);
 
-		var boundary = get_pending_boundary();
+	var restore = capture();
+	var boundary = get_pending_boundary();
 
-		Promise.all(async.map((expression) => async_derived(expression)))
-			.then((result) => {
-				batch?.activate();
+	Promise.all(async.map((expression) => async_derived(expression)))
+		.then((result) => {
+			batch?.activate();
 
-				restore();
+			restore();
 
-				try {
-					fn([...sync.map(d), ...result]);
-				} catch (error) {
-					// ignore errors in blocks that have already been destroyed
-					if ((parent.f & DESTROYED) === 0) {
-						invoke_error_boundary(error, parent);
-					}
+			try {
+				fn([...sync.map(d), ...result]);
+			} catch (error) {
+				// ignore errors in blocks that have already been destroyed
+				if ((parent.f & DESTROYED) === 0) {
+					invoke_error_boundary(error, parent);
 				}
+			}
 
-				batch?.deactivate();
-			})
-			.catch((error) => {
-				boundary.error(error);
-			});
-	} else {
-		fn(sync.map(d));
-	}
+			batch?.deactivate();
+		})
+		.catch((error) => {
+			boundary.error(error);
+		});
 }