Principle 2: Operable

2.0: Principle 2: Operable

User interface components and navigation must be operable.

2.1 : Keyboard Accessible:

Make all functionality available from a keyboard.

http://www.w3.org/TR/UNDERSTANDING-WCAG20/keyboard-operation.html

2.1.1: Keyboard: (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. (Level A)

2.1.2: No Keyboard Trap: (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. (Level A)

2.1.3: Keyboard (No Exception): (AAA)

All functionality of the content is operable through a keyboard interface without requiring specific timings for individual keystrokes. (Level AAA)

2.2 : Enough Time:

Provide users enough time to read and use content.

http://www.w3.org/TR/UNDERSTANDING-WCAG20/time-limits.html

2.2.1: Timing Adjustable: (A)

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

  • Turn off: The user is allowed to turn off the time limit before encountering it; or

2.2.2: Pause, Stop, Hide: (A)

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

2.2.3: No Timing: (AAA)

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. (Level AAA)

2.2.4: Interruptions: (AAA)

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

Sufficient Techniques for 2.2.4 – Interruptions

  • 1.G75: Providing a mechanism to postpone any updating of content

2.2.5: Re-authenticating: (AAA)

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

2.3 : Seizures:

Do not design content in a way that is known to cause seizures.

Advisory Techniques for Guideline 2.3

  • Ensuring that content does not violate spatial pattern thresholds

2.3.1: Three Flashes or Below Threshold: (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. (Level A)

2.3.2: Three Flashes: (AAA)

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

2.4.0: Navigable:

Provide ways to help users navigate, find content and determine where they are.

Advisory Techniques for Guideline 2.4

  • Limiting the number of links per page

2.4.1: Bypass Blocks: (A)

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

Sufficient Techniques for 2.4.1 – Bypass Blocks

1.Creating links to skip blocks of repeated material using one of the following techniques:

2.4.10: Section Headings: (AAA)

Section headings are used to organize the content. (Level AAA)

Note 1: “Heading” is used in its general sense and includes titles and other ways to add a heading to different types of content.

2.4.2: Page Titled: (A)

Web pages have titles that describe topic or purpose. (Level A)

Sufficient Techniques for 2.4.2 – Page Titled

1.G88: Providing descriptive titles for Web pages AND associating a title with a Web page using one of the following techniques:

2.4.3: Focus Order: (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. (Level A)

2.4.4: Link Purpose (In Context): (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. (Level A)

2.4.5: Multiple Ways: (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. (Level AA)

2.4.6: Headings and Labels: (AA)

Headings and labels describe topic or purpose. (Level AA)

Sufficient Techniques for 2.4.6 – Headings and Labels

  • 1.G130: Providing descriptive headings
  • 2.G131: Providing descriptive labels

2.4.7: Focus Visible: (AA)

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

2.4.8: Location: (AAA)

Information about the user’s location within a set of Web pages is available. (Level AAA)

Sufficient Techniques for 2.4.8 – Location

  • 1.G65: Providing a breadcrumb trail

2.4.9: Link Purpose (Link Only): (AAA)

A mechanism is available to allow the purpose of each link to be identified from link text alone, except where the purpose of the link would be ambiguous to users in general. (Level AAA)