1# Widget Data Interaction 2 3The ArkTS widget framework provides the **updateForm()** and **requestForm()** APIs to proactively trigger widget updates. You can use [LocalStorageProp](../quick-start/arkts-localstorage.md#localstorageprop) to check the widget data to be updated. 4 5 6 7 8| API| System Capability| Constraints| 9| -------- | -------- | -------- | 10| updateForm | No| 1. Invoked by the widget provider.<br>2. Allows only the widget provider to update its own widgets.| 11| requestForm | Yes| 1. Invoked by the widget host.<br>2. Allows only the widget host to update the widgets added to it.| 12 13The following are the typical use cases of widget updates: 14 15- [Configuring a Widget to Update Periodically](arkts-ui-widget-update-by-time.md) 16- [Updating Widget Content Through a Proxy](arkts-ui-widget-update-by-proxy.md) 17- [Updating Local and Online Images](arkts-ui-widget-image-update.md) 18- [Updating Widget Content by State](arkts-ui-widget-update-by-status.md) 19- [Updating Widget Content by Widget Host (for System Applications Only)](arkts-ui-widget-content-update.md) 20
