Add value attribute as a naming source for input type=image ?

[scottaohara]

The value attribute was never considered an official naming mechanism for input type=image, which is why it is not currently listed in the naming steps for the element. However, in testing this today I found that Chrome/Edge, Firefox and Safari all will use value to name the input if other higher priority naming mechanisms are not provided.

Not sure how/why support for this has increased, but seems reasonable to acknowledge it as a valid source now that it works in all the major desktop browsers, yes?

[giacomo-petri]

I didn't know that value was a valid attribute for an input type=image.
If that's the case we should include it.

[giacomo-petri]

After checking, it appears that according to the HTML specification value is not a permitted attribute for input type="image". I believe we should not included the value in the acc name calculation for input type="image".