It is critical to the usability of the widget that it be accessible when following established web navigation conventions. You can’t assume that the user is using a mouse, and therefore Adobe has taken steps to ensure that all aspects of the currently available widgets are accessible through the keyboard. In the Accordion widget, for example, you can use up and down arrow keys to open content panels. Adobe encourages all widget developers to build in this kind of functionality.

It’s also impossible to control the end user’s environment. Adobe develops widgets to ensure that when JavaScript is turned off, all the content of the widget is still available on the screen. While this will most likely affect the page layout, it is more important that the content of the widget still be available, especially when working with disclosure widgets. Adobe ensures that default CSS states do not set visibility to hidden, and that HTML code is not positioned off screen.