1# Widget Data Interaction 2 3 4The ArkTS widget framework provides the **updateForm()** and **requestForm()** APIs to proactively trigger widget updates. 5 6 7 8 9 10| API| System Capability| Constraints| 11| -------- | -------- | -------- | 12| updateForm | No| 1. Invoked by the provider.<br>2. Allows only the widget provider to update its own widgets. It cannot be used to update widgets by other providers.| 13| requestForm | Yes| 1. Invoked by the host.<br>2. Allows only the widget host to update the widgets added to it. It cannot be used to update widgets added to other hosts.| 14 15The following describes the typical use cases of widget updates: 16 17- [Configuring a Widget to Update Periodically](arkts-ui-widget-update-by-time.md) 18- [Updating Local and Online Images](arkts-ui-widget-image-update.md) 19- [Updating Widget Content by State](arkts-ui-widget-update-by-status.md) 20- [Updating Widget Content by Widget Host (for System Applications Only)](arkts-ui-widget-content-update.md) 21
