The WooCommerce Blocks Handbook provides documentation for designers and developers on how to extend or contribute to blocks, and how internal developers should handle new releases.
> Are you an internal developer? The following documents offer information about the different blocks, the Block Client APIs, the Store API, the templates and the testing process.
- [Blocks](internal-developers/blocks/README.md)
- [Stock Reservation during Checkout](internal-developers/blocks/stock-reservation.md)
- [Features Flags and Experimental interfaces](internal-developers/blocks/feature-flags-and-experimental-interfaces.md)
- [Cart and Checkout](designers/theming/cart-and-checkout.md)
- [Class names update in 4.6.0](designers/theming/class-names-update-460.md)
- [Class names update in 3.4.0](designers/theming/class-names-update-340.md)
- [Class names update in 3.3.0](designers/theming/class-names-update-330.md)
- [Class names update in 2.8.0](designers/theming/class-names-update-280.md)
- [Product grid blocks style update in 2.7.0](designers/theming/product-grid-270.md)
## Developer Resources
The following posts from <https://developer.woocommerce.com/category/developer-resources/>, provide deeper insights into the WooCommerce Blocks development.
- [Store API is now considered stable](https://developer.woocommerce.com/2022/03/25/store-api-is-now-considered-stable/)
- [Available Extensibility Interfaces for The Cart and Checkout Blocks](https://developer.woocommerce.com/2021/11/09/available-extensibility-interfaces-for-the-cart-and-checkout-blocks/)
## Tutorials
The following tutorials from <https://developer.woocommerce.com/category/tutorials/>, help you extending the WooCommerce Blocks plugin.
- [Hiding Shipping and Payment Options in the Cart and Checkout Blocks](https://developer.woocommerce.com/2022/05/20/hiding-shipping-and-payment-options-in-the-cart-and-checkout-blocks/)
- [Integrating your Payment Method with Cart and Checkout Blocks](https://developer.woocommerce.com/2021/03/15/integrating-your-payment-method-with-cart-and-checkout-blocks/)
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