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Ensure derive behaves consistently

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Fixes https://github.com/sveltejs/svelte/issues/2056
pull/2057/head
Jacob Wright 6 years ago
parent 3a03485d0d
commit f7e015037e
1 changed files with 1 additions and 2 deletions
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3
store.mjs
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@ -66,7 +66,6 @@ export function derive(stores, fn) {
const single = !Array.isArray(stores); const single = !Array.isArray(stores);
if (single) stores = [stores]; if (single) stores = [stores];
const auto = fn.length === 1;
let value = {}; let value = {};
return readable(set => { return readable(set => {
@ -78,7 +77,7 @@ export function derive(stores, fn) {
const sync = () => { const sync = () => {
if (pending) return; if (pending) return;
const result = fn(single ? values[0] : values, set); 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( const unsubscribers = stores.map((store, i) => store.subscribe(

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