Is my Application Navigable?

One of the key accessibility features for any application is keyboard navigability. Because many forms of assistive technology rely on keyboard controls exclusively, testing for keyboard support is a good thing to prioritize. Check in particular:

• Can basic tasks and workflows be completed using only a keyboard?
• Can all forms be completed using only a keyboard?
• When an element has tab focus, is there a visual indicator?
• If a modal or overlay opens, is keyboard focus trapped inside the new context until it is closed?

原文: https://angular-2-training-book.rangle.io/handout/a11y/testing/navigable.html