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Overview

Variables and Actions connect the UI to backend services and navigation. Variables load and bind data. Actions run the next step when something happens: invoke a service, show a message, open a page, or log in.

Actions keep business logic out of widget markup. You wire them from the Actions dialog or from a widget Events tab (for example on Tap or on Submit).

When actions run​

  • User events: button tap, form submit, list row select
  • System events: success or error after a variable or action completes

For event handler naming and UI callbacks, see Event handling overview.

Create an action​

From the Actions dialog

  1. Open Actions in Studio.
  2. Click New Action.
  3. Pick the action type (navigation, notification, login, and so on).

From a widget event

  1. Select the widget.
  2. Open the Events tab.
  3. Choose an event (for example on Tap) and click New Action.
  4. Complete the New Action dialog.

Action types​

Studio provides navigation, login, logout, timer, and notification actions. Configuration and invoke() examples are on Types of actions.