If your store still leans on old jQuery fragments to refresh the cart, the clock is running out on that approach. The WooCommerce Platform Updates coming up push that work toward the Interactivity API and block-based extensibility, and the Developer Advocacy team is going to Zagreb to walk through it.
The shift to the Interactivity API
The Interactivity API is replacing the spaghetti approach to frontend logic. I have spent years debugging race conditions in custom AJAX calls for mini-carts, and that kind of code breaks on almost every minor update. The block-first experience has become an architectural requirement for a modern store rather than a styling decision.
The WooCommerce 10.4 update showed what that buys you: client-side state handled without full-page reloads and without dragging in a heavy external library. The next round of WooCommerce Platform Updates builds on that foundation.
Checkout extensibility is the new standard
Customizing checkout used to mean hacking hooks like woocommerce_after_checkout_form. Blocks handle it now, which gives developers and merchants a more secure and predictable place to work. Building for 2026 means learning to register your own blocks inside the checkout flow instead of injecting HTML through a PHP filter.
// Example: Registering a script for the Interactivity API in Woo
// Instead of the old jQuery way, we use the wp-interactivity-api
add_action( 'wp_enqueue_scripts', function() {
wp_enqueue_script(
'bbioon-custom-interactivity',
plugins_url( 'js/view.js', __FILE__ ),
array( 'wp-interactivity' ),
'1.0.0'
);
} );The official Interactivity API documentation is worth reading properly if you want the details. Following it is what keeps your custom features from breaking when the core team ships the next major release.
Why Zagreb is worth the trip
The Zagreb meetup gets you behind-closed-doors detail on the product roadmap. Brent Mackinnon and the team will cover how AI features and the Interactivity API fit into the wider eCommerce picture. Compared with an online webinar, an in-person session tends to surface the gotchas that never make it into a tidy PR announcement.
If you missed the January Developer Office Hours, this is the next chance to ask the people building it. On the agenda: AI-driven product recommendations, plus the block-first architectures that high-performance builds will soon have to use.
If keeping up with WooCommerce Platform Updates is eating your dev hours, I can take it off your plate. I have been wrestling with WordPress since the 4.x days.
Where the Woo stack is going
Stop fighting the block editor. The WooCommerce Platform Updates lined up for 2026 point at a more decoupled and interactive core. Zagreb or the release notes, either way the practical advice is the same: stop writing code today that you will have to rip out next year.
