woocommerce/plugins/woocommerce-admin/client/layout/README.md

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Layout
======
This component handles the layout of the WooCommerce app. This also controls the routing, and which component should be shown on each page.
## Layout
The `Layout` component sets up the structure of the page, using the components described below. This also handles the sidebar state (stored in component state), and passes that through to Sidebar & Header, so the toggle buttons can work.
## Header
The Header component used in each section automatically fills into the "header" slot defined here. We're using [react-slot-fill](https://github.com/camwest/react-slot-fill) to avoid a duplicated `div` wrapper from Gutenberg's implementation. See the [header component docs](../components/header) for more information.
## Notices
This component will house the list of high priority notices. This appears on every page. _Currently just a placeholder div._
## Sidebar
This component contains the sidebar content. This is shown on every page, but conditionally hidden behind a toggle button in the Header.
## Controller
`layout/controller.js` has two exports, a `<Controller />` component and a `getPages` function.
### `getPages`
This function returns an array of objects, each describing a page in the app. The properties in each object are:
- `container`: A component, rendered in the main content area of the Layout
- `path`: The path this component should show up on (this should be unique to each entry)
- `wpMenu`: The ID of the menu item in the sidebar, used to toggle on/off the current menu item classes
- `hasOpenSidebar`: A boolean describing whether this page should show the sidebar open on larger screens
### `<Controller />`
This component pulls out the current page from `getPages`, and renders the container component defined in the object.