You are developing a Windows Store app by using HTML5. The app will be optimized for
accessibility. The app must meet the following accessibility requirements:
• Provide support for navigating all user interface elements.
• Provide support for invoking default functionality on the user interface.
• Provide support for use of a computer keyboard.
You need to ensure that the app meets the accessibility requirements. Which actions should
you perform? (Each correct answer presents part of the solution. Choose all that apply.)
A.
Set the tabIndex attribute for interactive elements. Dynamically manage the tabIndex
attribute for composite elements.
B.
Set the aria-live attribute of user interface elements to polite for important content that
changes dynamically.
C.
Ensure that visible text has a minimum luminosity contrast ratio of 1:1 against the
background.
D.
Implement event handlers for invoking default functionality.