anchor.diff:          | Manifest of string
           | MarginHeight of float
           | MarginWidth of float
  -        | Max of U2<float, string>
  +        | Max of obj
           | MaxLength of float
           | Media of string
           | MediaGroup of string
           | Method of string
  -        | Min of U2<float, string>
  +        | Min of obj
           | MinLength of float
           | Multiple of bool
           | Muted of bool
  
positive.code: 
      type HTMLAttr =
          | DefaultChecked of bool
          | DefaultValue of U2<string, ResizeArray<string>>
          | Accept of string
          | AcceptCharset of string
          | AccessKey of string
  
negative.code:         | AutoFocus of bool
          | AutoPlay of bool
          | Capture of bool
          | CellPadding of obj
          | CellSpacing of obj
          | CharSet of string
          | Challenge of string
          | Checked of bool
  