[ACT:akn7bn, HELP] New rule - Iframe with negative tabindex has no interactive elements

[philljenkins]

Create HELP for new rule iframe_interactive_tabbable.html

New Proposed rule ACT akn7bn - Iframe with negative tabindex has no interactive elements

Need Help for new iFrame rule that maps to IBM Requirement 2.1.1: Keyboard (Level A)

related to #1154 [ACT] New rule for akn7bn - Iframe with negative tabindex has no interactive elements

Help needs to address these situations:

• Passed Example 1 - link broke, open issue in ACT community. This iframe element does not have a tabindex attribute value that is a negative number.
• Passed Example 2 - This iframe element does not have a tabindex attribute value that is a negative number. Checker detects: Inline frame does not have a 'title' attribute: WCAG20_Frame_HasTitle Fail_1
• Failed Example 1 - This iframe element contains a visible link that is part of its sequential focus navigation order, and has a negative tabindex. Checker detects: Valerie_Frame_SrcHtml Potential_1: Verify content is accessible.
• Also see Passed and Inapplicable test cases.

Chores:

• Help committed to branch dev-1154
• new ruleID, messages, mapping iframe_interactive_tabbable.ts
• check Help against our style guide
• check Help with Grammarly
• spellcheck
• See ACT akn7bn - Iframe with interactive element are excluded from tab order box note discussion for this new rule
• See Details by ACT test case tab in the spreadsheet ACT vs Engine inconsistencies.xlsx on box.

[philljenkins]

Will draft Help in box note discussion for the new rule

[sct-will]

Draft was started but focusing on different tasks. Moving into next sprint.

[philljenkins]

• Help committed to branch dev-1154
• new ruleID, messages, mapping iframe_interactive_tabbable.ts

Checked

• our style guide,
• Grammarly,
• spellchecked,

[philljenkins]

Updated a couple minor formatting bugs in Help found during review

[philljenkins]