Test for WCAG success criterion 2.4.1: Bypass blocks

[hannolans]

http://www.w3.org/TR/UNDERSTANDING-WCAG20/navigation-mechanisms-skip.html
A mechanism is available to bypass blocks of content that are repeated on the same Web page -- skip links and headings.

scope selector

Page (and a selector for regions, and a selector for blocks)

Applicable

Always

Failures

None defined

Techniques

• G1: Adding a link at the top of each page that goes directly to the main content area (Test for WCAG technique G1: Adding a link at the top of each page that goes directly to the main content area #176 - implemented)
• G123: Adding a link at the beginning of a block of repeated content to go to the end of the block
• G124: Adding links at the top of the page to each area of the content
• H69: Providing heading elements at the beginning of each section of content ( Test for WCAG technique H69: Providing heading elements at the beginning of each section of content #198 )
• H70: Using frame elements to group blocks of repeated material (Test for WCAG technique H70: Using frame elements to group blocks of repeated material #90) AND H64: Using the title attribute of the frame and iframe elements (Test for WCAG technique H64: Using the title attribute of the frame and iframe elements #65)
• SCR28: Using an expandable and collapsible menu to bypass block of content

Relationship between techniques

• There are two main directions for this success criterion: 'links to skip blocks' or 'grouping blocks'.
• G124 seems a more advanced version of G1, so if G124 passes, G124 passes as well
• H70 and G123: 'repeated material' is difficult for testing, as we need more than one page for that
• H69, H70 AND SCR28 are about "Grouping blocks of repeated material in a way that can be skipped". Scope is 'group of blocks' (in Drupal called regions)
• G1, G123 and G124 are about 'Creating links to skip blocks'. Scope are blocks.
• H70 is only a pass for this success criterion if H64 also passes.
• H70 is a depreciated technology
• Because we have so many possible techniques and no failures, this test will most of the time pass. It's important that some of the most used techniques can give a pass. That would be G1 (skip link), and secondly, region headings

[kevee]

Note we have skipToContentLinkProvided and headersUseToMarkSections.

[hannolans]

headersUseToMarkSections is now looking for strong paragraphs. We could broaden this test and look for menu's and blocks and see if that section is using a heading.