[hidden.html]
  type: testharness
  [valueAsDate attribute must return null for hidden]
    expected: FAIL

  [valueAsNumber attribute must return NaN for hidden]
    expected: FAIL

  [list attribute must return null for hidden]
    expected: FAIL

  [stepDown does not apply for hidden]
    expected: FAIL

  [stepUp does not apply for hidden]
    expected: FAIL

  [input type=hidden is barred from constraint validation]
    expected: FAIL