The Shopify POS platform just got smarter. With the new shopify.storage.current API, developers can create extensions that automatically react to data changes across any target on the same POS device—no more manual polling or duplicate reads. This change, available in API version 2026-10, turns stored values into reactive signals, making real‑time UI updates effortless for both developers and merchants.
What Changed?
Shopify added a read‑only, reactive layer on top of the existing Storage API. Each key you store—whether it’s a loyalty point balance, a cart note, or a temporary flag—can now be accessed through shopify.storage.current[key] as a signal. The signal always reflects the latest value, regardless of which extension target (background, smart grid tile, modal, etc.) wrote to it. When a value changes, every subscriber automatically re‑renders, eliminating the need for custom event listeners or interval‑based fetches.
The API remains fully backward compatible. Write and delete operations still use the classic shopify.storage.set and shopify.storage.remove methods. Only the read path is new, and it returns a reactive signal instead of a static value. Because the underlying storage loads asynchronously, a signal’s initial value is undefined until the key finishes loading—so you should always guard against that state in your UI logic.
In practice, imagine a background task that fetches a customer’s loyalty points from an external service and stores them under the key "loyaltyPoints". A smart‑grid tile can display those points instantly: as soon as the background task writes the new value, the tile’s signal updates and the UI refreshes without any extra code.
Because the signal is read‑only, you can’t modify it directly—writes still go through the regular Storage API. This design keeps data integrity while giving you the convenience of reactive programming.
Who Is Affected?
Only POS UI extensions that declare API version 2026-10 or later can import shopify.storage.current. Extensions still running on older versions will continue to work with the classic Storage API but won’t have access to the reactive signals. Merchants don’t need to take any action; the change is invisible to them unless a developer updates the extension to use the new API.
How to Adopt Reactive Storage
Practical Example
js
// background.target.js – fetch and store points
import {shopify} from '@shopify/pos-extension';
async function updatePoints(customerId) {
const response = await fetch(/loyalty/${customerId});
const {points} = await response.json();
await shopify.storage.set('loyaltyPoints', points);
}
// smart-grid.tile.js – reactive UI
import {shopify} from '@shopify/pos-extension';
const pointsSignal = shopify.storage.current['loyaltyPoints'];
function LoyaltyTile() {
// pointsSignal.value is undefined until the key loads
const points = pointsSignal.value ?? 0;
return (
<div class="loyalty-tile">
+ <h3>Loyalty Balance</h3>
+ <p>${points} points</p>
+ </div>
);
}
// The framework re‑renders LoyaltyTile automatically whenever
// shopify.storage.set('loyaltyPoints') is called from any target.
Migration Tips & Best Practices
Conclusion
Reactive storage turns POS UI extensions into truly live components, letting merchants see up‑to‑date information without extra code overhead. By upgrading to API version 2026-10 and swapping a few reads for shopify.storage.current, developers can deliver smoother, faster experiences for checkout staff and customers alike. Ready to make your POS extensions reactive? Update your extension today and watch the data sync in real time!
