Modules Support

Lightning web component modules in the lightning namespace are described in the Component Reference in the Lightning Web Components Developer Guide. Modules scoped with @salesforce are described in @salesforce Modules in the Lightning Web Components Developer Guide. All modules are being reviewed for correct behavior in LWC Offline-enabled mobile apps.

The following table presents current findings.

— Supported. Expected to behave as documented.
— Limited Support. Can be used, but has known (and possibly unknown) issues.
— Not Supported. Might work, but shouldn’t be used.

Module	Status	Comments
`lightning` Namespace Modules These modules contain resources that don’t change and are universal to all orgs.
`lightning/alert` Create an alert modal within your component.
`lightning/confirm` Create a confirm modal within your component.
`lightning/empApi` Provides methods for subscribing to a streaming channel and listening to event messages.		Not supported in mobile apps.
`lightning/flowSupport` Provides events to control flow navigation and notify the flow of changes in attribute values.
`lightning/messageService` Communicates across the DOM between Visualforce pages, Aura components, and Lightning web components.		Lightning Aura components and Visualforce aren’t supported in the Field Service mobile app. This isn’t expected to change.
`lightning/navigation` Generates a URL or navigates to a page reference.		Available for use, but supported page reference types are limited. See Navigation for details.
`lightning/pageReferenceUtils` Provides utilities for encoding and decoding default field values.		Not supported in mobile apps.
`lightning/platformResourceLoader` Imports a third-party JavaScript or CSS library.		Not supported for offline use.
`lightning/platformShowToastEvent` Displays toasts to provide feedback to a user following an action, such as after a record is created.		You can import this module and fire toast events. However, toast messages aren’t handled or displayed. Use `lightning/alert`, `lightning/confirm`, or `lightning/prompt` instead.
`lightning/prompt` Create a prompt modal within your component.
`lightning/userConsentCookie` Utility functions to incorporate the Cookie Consent mechanism in your components.		Relevant only for Experience Builder pages.
`@salesforce` Scoped Modules The shape of these modules can be dynamic, defined by your organization’s metadata.
`@salesforce/apex` Import Apex methods as functions that a component can call either via `@wire` or imperatively.		See Use Apex While Mobile and Offline for usage details.
`@salesforce/apexContinuation` Import methods from Apex continuation classes.		See Use Apex While Mobile and Offline for usage details.
`@salesforce/client/formFactor` Import a name that refers to the form factor of the hardware running the app.		This module “works,” but always returns `Small` when used in an LWC Offline-enabled app.
`@salesforce/community` Import the ID of the current Experience Builder site.		Relevant only for Experience Builder pages.
`@salesforce/contentAssetUrl` Import content asset files.
`@salesforce/i18n` Import internationalization properties.
`@salesforce/label` Import labels defined in your Salesforce organization.
`@salesforce/messageChannel` Import a Lightning message channel that a component can use to communicate via the Lightning Message Service.		Lightning Message Service isn’t supported in LWC Offline-enabled mobile apps.
`@salesforce/resourceUrl` Import static resources defined in your Salesforce organization.
`@salesforce/schema` Import references to Salesforce objects and fields defined in your org.
`@salesforce/user` Import the current user’s ID.
`@salesforce/userPermission` Import a permission and check whether it’s assigned to the current user.
`@salesforce/customPermission` Import a custom permission and check whether it’s assigned to the current user.

See Also