syncbasestore

Version:

Lightweight reactive store with built-in filtering and async state handling

19 lines (18 loc) • 684 B

JavaScript

export async function syncMerge(promise1, promise2, options) {
    const { waitMs = 0, mergeFn, keepStore = false, target } = options || {};
    if (keepStore && !target) {
        throw new Error(`'keepStore' is true, but 'target' (setter function) is not provided.`);
    }
    const [data1, data2] = await Promise.all([promise1, promise2]);
    if (waitMs > 0) {
        await new Promise((res) => setTimeout(res, waitMs));
    }
    const result = mergeFn ? mergeFn(data1, data2) : undefined;
    const finalResult = mergeFn
        ? { data1, data2, result }
        : { data1, data2 };
    if (keepStore && target) {
        target(finalResult);
    }
    return finalResult;
}