Mobile and Offline Developer Guide

Mobile App Development with Lightning Web Components and LWC Offline
Create Mobile-Ready Components
Use Mobile Device Features in Mobile Apps
Offline Considerations and Limitations
General Considerations
Considerations for Field Service Mobile App
Base Components Support
Modules Support
Wire Adapters Support
Entity Support
Metadata and Custom Metadata Types Support
Offline Environment Details
Use Salesforce Features While Offline
Development Tools and Processes
Quick Start Tutorials
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Metadata and Custom Metadata Types Support

LWC Offline uses the UI-API to access standard metadata.

Metadata for entities, layouts and other customizations, and Lightning web components is automatically primed or loaded when used, and is cached for offline use. However, the UI-API doesn’t support loading custom metadata types. As a consequence, custom metadata isn’t primed or cached automatically. This affects features that use custom metadata, such as Flows.

If you must retrieve custom metadata, you can do that using Apex requests. If your Apex request methods are cacheable, the custom metadata you access is available while offline. See Use Apex While Mobile and Offline.