Checklist

All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes, except where the underlying function requires input that depends on the path of the user's movement and not just the endpoints.

If keyboard focus can be moved to a component of the page using a keyboard interface, then focus can be moved away from that component using only a keyboard interface, and, if it requires more than unmodified arrow or tab keys or other standard exit methods, the user is advised of the method for moving focus away.

For each time limit that is set by the content, at least one of the following is true:

• Turn off
  The user is allowed to turn off the time limit before encountering it; or
• Adjust
  The user is allowed to adjust the time limit before encountering it over a wide range that is at least ten times the length of the default setting; or
• Extend
  The user is warned before time expires and given at least 20 seconds to extend the time limit with a simple action (for example, "press the space bar"), and the user is allowed to extend the time limit at least ten times; or
• Real-time Exception
  The time limit is a required part of a real-time event (for example, an auction), and no alternative to the time limit is possible; or
• Essential Exception
  The time limit is essential and extending it would invalidate the activity; or
• 20 Hour Exception
  The time limit is longer than 20 hours.

For moving, blinking, scrolling, or auto-updating information, all of the following are true:

• Moving, blinking, scrolling
  For any moving, blinking or scrolling information that (1) starts automatically, (2) lasts more than five seconds, and (3) is presented in parallel with other content, there is a mechanism for the user to pause, stop, or hide it unless the movement, blinking, or scrolling is part of an activity where it is essential; and
• Auto-updating
  For any auto-updating information that (1) starts automatically and (2) is presented in parallel with other content, there is a mechanism for the user to pause, stop, or hide it or to control the frequency of the update unless the auto-updating is part of an activity where it is essential.

Timing is not an essential part of the event or activity presented by the content, except for non-interactive synchronized media and real-time events.

Interruptions can be postponed or suppressed by the user, except interruptions involving an emergency.

When an authenticated session expires, the user can continue the activity without loss of data after re-authenticating.

Users are warned of the duration of any user inactivity that could cause data loss, unless the data is preserved for more than 20 hours when the user does not take any actions.

Web pages do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds.

Web pages do not contain anything that flashes more than three times in any one second period.

Motion animation triggered by interaction can be disabled, unless the animation is essential to the functionality or the information being conveyed.

A mechanism is available to bypass blocks of content that are repeated on multiple Web pages.

Web pages have titles that describe topic or purpose.

If a Web page can be navigated sequentially and the navigation sequences affect meaning or operation, focusable components receive focus in an order that preserves meaning and operability.

The purpose of each link can be determined from the link text alone or from the link text together with its programmatically determined link context, except where the purpose of the link would be ambiguous to users in general.

More than one way is available to locate a Web page within a set of Web pages except where the Web Page is the result of, or a step in, a process.

Headings and labels describe topic or purpose.

Any keyboard operable user interface has a mode of operation where the keyboard focus indicator is visible.

Information about the user's location within a set of Web pages is available.

Section headings are used to organize the content.

All functionality that uses multipoint or path-based gestures for operation can be operated with a single pointer without a path-based gesture, unless a multipoint or path-based gesture is essential.

For functionality that can be operated using a single pointer, at least one of the following is true:

• No Down-Event
  The down-event of the pointer is not used to execute any part of the function;
• Abort or Undo
  Completion of the function is on the up-event, and a mechanism is available to abort the function before completion or to undo the function after completion;
• Up Reversal
  The up-event reverses any outcome of the preceding down-event;
• Essential
  Completing the function on the down-event is essential.

Functionality that can be operated by device motion or user motion can also be operated by user interface components and responding to the motion can be disabled to prevent accidental actuation, except when:

• Supported Interface
  The motion is used to operate functionality through an accessibility supported interface;
• Essential
  The motion is essential for the function and doing so would invalidate the activity.

Web content does not restrict use of input modalities available on a platform except where the restriction is essential, required to ensure the security of the content, or required to respect user settings.