TabbingNotSymmetric

Text

Tabbing backwards and forwards does not yield the same element. Expected {0} but received {1}

Type

Error

Description

When using standard keyboard navigation (Tab or Shift+Tab), it isn't possible to repeat the path of traversal through the element tree of the verification target if the direction of traversal is reversed. For example, tabbing forward (Tab) x times from element A(0) to element A(x) and then tabbing backward (Shift+Tab) x times results in element A(0) regaining focus through a different set of intermediate elements.

This issue causes problems for people who rely on a screen-reader and keyboard for navigation because traversing elements appears erratic and unpredictable.

Possible causes

  • Multiple elements or their parents are custom controls that don't implement tabbing correctly. For example, the MSAA State property is not set correctly.

Related topics

Guidelines for Keyboard User Interface Design

 

 

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