woocommerce/plugins/woocommerce-blocks/docs/third-party-developers/extensibility/README.md

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# Extensibility in WooCommerce Blocks <!-- omit in toc -->
## Table of Contents <!-- omit in toc -->
- [Imports and dependency extration](#imports-and-dependency-extration)
- [Hooks (actions and filters)](#hooks-actions-and-filters)
- [REST API](#rest-api)
- [Checkout Payment Methods](#checkout-payment-methods)
- [Checkout Block](#checkout-block)
These documents are all dealing with extensibility in the various WooCommerce Blocks.
## Imports and dependency extration
The documentation in this section will use window globals in code examples, for example:
```js
const { registerCheckoutFilters } = window.wc.blocksCheckout;
```
However, if you're using `@woocommerce/dependency-extraction-webpack-plugin` for enhanced dependency management you can instead use ES module syntax:
```js
import { registerCheckoutFilters } from '@woocommerce/blocks-checkout';
```
See <https://www.npmjs.com/package/@woocommerce/dependency-extraction-webpack-plugin> for more information.
## Hooks (actions and filters)
| Document | Description |
| ----------------------------- | ------------------------------------------------------- |
| [Actions](./hooks/actions.md) | Documentation covering action hooks on the server side. |
| [Filters](./hooks/filters.md) | Documentation covering filter hooks on the server side. |
## REST API
| Document | Description |
| ---------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- |
| [Exposing your data in the Store API.](./rest-api/extend-rest-api-add-data.md) | Explains how you can add additional data to Store API endpoints. |
| [Available endpoints to extend with ExtendSchema](./rest-api/available-endpoints-to-extend.md) | A list of all available endpoints to extend. |
| [Available Formatters](./rest-api/extend-rest-api-formatters.md) | Available `Formatters` to format data for use in the Store API. |
| [Updating the cart with the Store API](./rest-api/extend-rest-api-update-cart.md) | Update the server-side cart following an action from the front-end. |
## Checkout Payment Methods
| Document | Description |
| -------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------- |
| [Checkout Flow and Events](./checkout-payment-methods/checkout-flow-and-events.md) | All about the checkout flow in the checkout block and the various emitted events that can be subscribed to. |
| [Payment Method Integration](./checkout-payment-methods/payment-method-integration.md) | Information about implementing payment methods. |
| [Filtering Payment Methods](./checkout-payment-methods/filtering-payment-methods.md) | Information about filtering the payment methods available in the Checkout Block. |
## Checkout Block
In addition to the reference material below, [please see the `block-checkout` package documentation](../../../packages/checkout/README.md) which is used to extend checkout with Filters, Slot Fills, and Inner Blocks.
| Document | Description |
| ------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------- |
| [How the Checkout Block processes an order](./checkout-block/how-checkout-processes-an-order.md) | The detailed inner workings of the Checkout Flow. |
| [IntegrationInterface](./checkout-block/integration-interface.md) | The `IntegrationInterface` class and how to use it to register scripts, styles, and data with WooCommerce Blocks. |
| [Available Filters](./checkout-block/available-filters.md) | All about the filters that you may use to change values of certain elements of WooCommerce Blocks. |
| [Slots and Fills](./checkout-block/slot-fills.md) | Explains Slot Fills and how to use them to render your own components in Cart and Checkout. |
| [Available Slot Fills](./checkout-block/available-slot-fills.md) | Available Slots that you can use and their positions in Cart and Checkout. |
| [DOM Events](./checkout-block/dom-events.md) | A list of DOM Events used by some blocks to communicate between them and with other parts of WooCommerce. |
| [Filter Registry](../../../packages/checkout/filter-registry/README.md) | The filter registry allows callbacks to be registered to manipulate certain values. |
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