How to view event listeners
The list on the Events tab is dynamic. If you add an event while the app is running, the new event will appear there. Event listeners for code elements that aren't DOM elements, such as xhr, don't appear on the Events tab.
To view event listeners
With the template open in Visual Studio, select Simulator in the drop-down list that's next to the Start Debugging button on the Debug toolbar in the debugger. This list is shown here:
Press F5 to run the app in debug mode.
Switch to Visual Studio (Alt+Tab or F12).
In DOM Explorer, click the BODY element (or use the arrow keys to select the element).
Click the Events tab in the pane on the right side of DOM Explorer.
You can now see the events that have active subscribers for the BODY element, as shown in the following illustration.