Ensure derive behaves consistently

Fixes https://github.com/sveltejs/svelte/issues/2056
7 years ago · 3045dd5d56
parent 73feee76fa
commit 3045dd5d56
1 changed files with 1 additions and 2 deletions
--- a/store.mjs
+++ b/store.mjs
@ -66,7 +66,6 @@ export function derive(stores, fn) {
 	const single = !Array.isArray(stores);
 	if (single) stores = [stores];

-	const auto = fn.length === 1;
 	let value = {};

 	return readable(set => {
@ -78,7 +77,7 @@ export function derive(stores, fn) {
 		const sync = () => {
 			if (pending) return;
 			const result = fn(single ? values[0] : values, set);
-			if (auto && (value !== (value = result))) set(result);
+			if (value !== (value = result)) set(result);
 		}

 		const unsubscribers = stores.map((store, i) => store.subscribe(