PDFEngineDemoUI/migration.md

# Migration from version 2

Migration from version 2 must be performed manually because the components library `@coreui/coreui-react` has been completely rewritten.

The docs of the new components are available [here](https://coreui.io/react/docs/)

The good news is that most probably it will be sufficient to migrate layout components (Sidebar, Header, Footer, Aside) and `Switch` component

The best way to do a migration is:
1. Install `@coreui/coreui-react` v3
2. Make a copy of the current `containers` folder
2. Paste [containers](https://github.com/coreui/coreui-free-react-admin-template/tree/master/src/containers) folder from v3 template to project
3. Correct routing paths
4. Add previous content to new template layout components
5. Replace `Switch` components with `CSwitch`

Layout components/ corresponding components in version 3
- Aside -> CSidebar (with prop aside={true})
- AsideToggler -> CToggler
- Breadcrumb -> CBreadcrumbRouter
- Footer -> CFooter
- Header -> CHeader
- HeaderDropdown -> CDropdown
- NavbarBrand -> CSidebarBrand
- Sidebar -> CSidebar
- SidebarFooter -> CSidebarFooter
- SidebarForm -> CSidebarForm
- SidebarHeader -> CSidebarHeader
- SidebarMinimizer -> CSidebarMinimizer
- SidebarNav -> CSidebarNav + CSidebarNavDropdown + CSidebarNavItem
- SidebarToggler -> CSidebarToggler
- Switch -> CSwitch

After the migration is done, you can start using new components of `@coreui/coreui-react` v3 library.