# Cookbook Concrete problems and their solutions, one chapter each, grouped by what an app is made of. The [Cheat Sheet](/cookbook/cheat_sheet) is the checklist to keep open while working; the groups below are where each rule on it is explained in full. | Group | What it covers | Start with | |---|---|---| | View | Building the view in ABAP, nested views, XML templating | [Definition](/cookbook/view/definition) | | Model | Binding, expression binding and formatters, tables, trees, the device model, the size limit | [Binding](/cookbook/model/binding) | | Event, Navigation | The life cycle, backend and frontend events, navigation inside and between apps, the hash and the app state, exceptions | [Life Cycle](/cookbook/event_navigation/life_cycle) | | Popup, Popover | Dialogs and popovers as fragments of their own | [Popup](/cookbook/popup_popover/popup) | | Translation, Messages | Messages, logging, translation with i18n | [Message](/cookbook/translation_messages/message) | | Browser Interaction | The title, focus, scrolling, timers, the clipboard, URL handling, the soft keyboard, keyboard shortcuts | [Title](/cookbook/browser_interaction/title) | | Device Capabilities | What the frontend reports about itself, camera, geolocation, barcode scanning, audio and video, upload and download, PDF, spreadsheets | [Info](/cookbook/device_capabilities/info) | | State, Connectivity | Locks, statefulness, WebSocket, OData, smart controls | [Lock](/cookbook/expert_more/lock) | | EML, CDS, SQL | RAP, EML, draft handling, CDS, ABAP SQL | [RAP](/cookbook/eml_cds_sql/rap) | | Patterns, Helpers | Snippets, value help, demo output, e-mail, fuzzy search | [Snippets](/cookbook/expert_more/snippets) | | Troubleshooting | The failures that come up most, and what each one means | [Common Failures](/cookbook/troubleshooting/common_failures) |