2.1.43 [W3C-HTML51] Section 4.9.10 The th element

V0137: The abbr attribute is not defined directly on the HTMLTableHeaderCellElement interface

The specification states:

 4.9.10 The th element
     ...
     DOM interface:
  
         interface HTMLTableHeaderCellElement : HTMLTableCellElement {
             ...
             attribute DOMString abbr;
         };

EdgeHTML Mode

The abbr attribute is not defined directly on the HTMLTableHeaderCellElement interface. Instead, it is abstracted to the base class HTMLTableCellElement.