2.1.14 [W3C-HTML51] Section 4.3.1 The body element

V0033: The onerror event handler does not replace the generic event handler

The specification states:

 4.3.1 The body element
     ...
     The onblur, onerror, onfocus, onload, onresize, and onscroll event handlers of the 
     Window object, exposed on the body element, replace the generic event handlers with 
     the same names normally supported by HTML elements.

EdgeHTML Mode

The onerror event handler does not replace the generic event handler.