2.1 Keyboard accessible
Not everybody is able to use a mouse. Many people rely on keyboard navigation to access online content. These criteria ensure that your content is accessible for people who use the keyboard, but this often also translates into voice-recognition software users.
2.1.1 Keyboard (Level A)
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.
2.1.2 No keyboard trap (Level A)
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.
Keyboard traps make your webpage unusable for people who navigate by keyboard. Find out what they are and how to test for them.
2.1.4 Character key shortcuts (Level A)
If a keyboard shortcut is implemented in content using only letter (including upper- and lower-case letters), punctuation, number, or symbol characters, then at least one of the following is true:
- Turn off: A mechanism is available to turn the shortcut off
- Remap: A mechanism is available to remap the shortcut to use one or more non-printable keyboard characters (e.g. Ctrl, Alt, etc);
- Active only on focus: The keyboard shortcut for a user interface component is only active when that component has focus.
2.2 Enough time
2.2.1 Timing adjustable (Level A)
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
- 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
- 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
- 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
- Essential Exception: The time limit is essential and extending it would invalidate the activity
- 20 Hour Exception: The time limit is longer than 20 hours.
2.2.2 Pause, stop, hide (Level A)
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
- 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.
2.3 Seizures and physical reactions
2.3.1 Three flashes or below threshold (Level A)
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.
I'm probably not going to ever write a post about this. I never use any kind of flashing, blinking or flickering content. It drives me crazy! It triggers my migraines and I wish it was just banned altogether. My advice would be to avoid it unless you are in the movie industry and are creating a film full of special effects.
2.4.1 Bypass blocks (Level A)
A mechanism is available to bypass blocks of content that are repeated on multiple Web pages.
If you use the tab key to navigate a webpage, it can take many keystrokes to get past all the menus and navigation items and into the main part of the page. A bypass block allows the user to skip past repeated items on a page and dive straight into the main content.
2.4.2 Page titled (Level A)
Web pages have titles that describe topic or purpose.
Page titles are important in any context. Can you imagine a book with no title? There are different ways of ensuring that your work has a title, depending on the application. Select from the list below:
2.4.3 Focus order (Level A)
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.
Navigating by keyboard really relies on the focus order being logical. Find out how to test and what to be careful about.
2.4.4. Link purpose (in context) (Level A)
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.
Hyperlinks are used in many different contexts. Choose from the list below:
- Learn how to make your hyperlinks accessible for people using assistive software.
- Learn how to create accessible hyperlinks in Word
- Learn how to create accessible hyperlinks in PowerPoint
2.4.5 Multiple ways (Level AA)
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.
2.4.6 Headings and labels (Level AA)
Headings and labels describe topic or purpose.
2.4.7 Focus visible (Level AA)
Any keyboard operable user interface has a mode of operation where the keyboard focus indicator is visible.
2.4.11 Focus not obscured (minimum) (Level AA) (new)
When a user interface component receives keyboard focus, the component is not entirely hidden due to author-created content.
As this is a new WCAG 2.2 criterion, it may change or be removed when WCAG 2.2 is published. However, this is now looking less than likely, so I thought it was worth including.
2.5 Input modalities
2.5.1 Pointer gestures (Level A)
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.
2.5.2 Pointer cancellation (Level A)
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.
2.5.3 Label in name (Level A)
For user interface components with labels that include text or images of text, the name contains the text that is presented visually.
2.5.4 Motion actuation (Level A)
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.
2.5.7 Dragging movements (Level AA) (new)
All functionality that uses a dragging movement for operation can be achieved by a single pointer without dragging, unless dragging is essential or the functionality is determined by the user agent and not modified by the author.
2.5.8 Target size (minimum) (Level AA) (new)
The size of the target for pointer inputs is at least 24 by 24 CSS pixels, except where:
- Spacing: The target does not overlap any other target and has a target offset of at least 24 CSS pixels to every adjacent target
- Equivalent: The function can be achieved through a different control on the same page that meets this criterion
- Inline: The target is in a sentence, or is in a bulleted or numbered list, or its size is otherwise constrained by the line-height of non-target text
- User agent control: The size of the target is determined by the user agent and is not modified by the author
- Essential: A particular presentation of the target is essential or is legally required for the information being conveyed.