# Focus Event A focus event is triggered when the page focus moves between components. It can be used to process related logic within the component. > **NOTE** > > - The APIs of this module are supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version. > > - Currently, only the Tab button and arrow buttons on the external keyboard can be used to trigger the focus event. > > - Components that have default interaction logic, such as **\