Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 38 0+0+0] [BFC] children: not-inline
    Box <body> at [8,8] flex-container(row) [8+0+0 50 0+0+742] [8+0+0 22 0+0+8] [FFC] children: not-inline
      BlockContainer <div> at [8,8] flex-item [0+0+0 285.546875 0+0+0] [0+0+0 22 0+0+0] [BFC] children: inline
        frag 0 from BlockContainer start: 0, length: 0, rect: [13,10 275.546875x18] baseline: 15.796875
        TextNode <#text> (not painted)
        BlockContainer <button> at [13,10] inline-block [0+1+4 275.546875 4+1+0] [0+1+1 18 1+1+0] [BFC] children: not-inline
          BlockContainer <(anonymous)> at [13,10] flex-container(column) [0+0+0 275.546875 0+0+0] [0+0+0 18 0+0+0] [FFC] children: not-inline
            BlockContainer <(anonymous)> at [13,10] flex-item [0+0+0 275.546875 0+0+0] [0+0+0 18 0+0+0] [BFC] children: inline
              frag 0 from TextNode start: 5, length: 24, rect: [13,10 275.546875x18] baseline: 13.796875
                  "LOOOOOOOOOOOOOOOOOOOOONG"
              TextNode <#text> (not painted)
        TextNode <#text> (not painted)
      BlockContainer <(anonymous)> (not painted) [BFC] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x38]
    PaintableBox (Box<BODY>) [8,8 50x22] overflow: [8,8 285.546875x22]
      PaintableWithLines (BlockContainer<DIV>) [8,8 285.546875x22]
        PaintableWithLines (BlockContainer<BUTTON>) [8,8 285.546875x22]
          PaintableWithLines (BlockContainer(anonymous)) [13,10 275.546875x18]
            PaintableWithLines (BlockContainer(anonymous)) [13,10 275.546875x18]
              TextPaintable (TextNode<#text>)

SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x38] [children: 0] (z-index: auto)
