Function fromStore

packages/svelte/src/store/index-client.js:128–169

(store)

 * @param {Writable<V> | Readable<V>} store
 */
export function fromStore(store) {
	let value = /** @type {V} */ (undefined);

	const subscribe = createSubscriber((update) => {
		let ran = false;

		const unsubscribe = store.subscribe((v) => {
			value = v;
			if (ran) update();
		});

		ran = true;

		return unsubscribe;
	});

	function current() {
		if (effect_tracking()) {
			subscribe();
			return value;
		}

		return get(store);
	}

	if ('set' in store) {
		return {
			get current() {
				return current();
			},
			set current(v) {
				store.set(v);
			}
		};
	}

	return {
		get current() {
			return current();
		}
	};
}