What is Keyboard Navigation?

Some users, particularly those with visual or motor impairments, will use the keyboard to navigate your app or webpage. If a user can use the mouse to interact with a component, the same interaction must be accessible to a keyboard-only user.

What are the Common Keyboard Controls?

• Tab : Navigates forwards between elements.
• Shift + Tab : Navigates backwards between elements.
• Arrow Keys : Moves between options, such as in a Select, Radio, or Checkboxes.
• Enter : Activates links and buttons or Submits forms.
• Spacebar : Activates Buttons, Switches, Checkboxes, or Radios.
• Esc : Can close Modals or stop some actions.

What is Focus?

Focus creates an ouline (typically a light-blue outline around interactive items) around which element the user’s keyboard is currently situated. Although Focus may change based on your particular application, follow these general guidelines:

• Unless there is a Skip Link, Focus should start on the first interactive element on the screen when the page loads.
• Focus should never change on its own. It should always be initiated by a user action.
• Focus should be obvious.
• If an action causes the currently focused element to disable or hide, then Focus should go to the next logical interactive element.
• Don’t remove Focus styles.
• Focus follows source order.

Considerations for Keyboard Navigation

Ensure accessibility, so keep the following in mind:

• All interactive elements on the page should be accessible via keyboard navigation. If a user can do something with a mouse, it should also be accessible to a keyboard-only user.
• Users should be able to focus on every interactive element on the page using Tab (or Shift + Tab to move in reverse). These include buttons, links, toggles, and menu options.
• Once focused on an interactive object, users should be able to interact with it using the Enter, Spacebar, or Arrow keys depending on the element.
• Users should not be able to Tab to non-interactive elements, such as images, text areas, or other static elements

Special Keyboard Uses

Typeaheads/ Selects / Autocompletes

• Arrow Keys allow users to navigate through presented options
• Enter activates or selects desired option
• Esc collapses the menu

Modal

• Focus is always initially on the ‘Cancel’ or ‘Close’ option, unless project calls for a different behavior
• Enter submits the chosen option
• Esc closes the Modal, cancelling the action

Resources

• WebAIM - Keyboard Accessibility