Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x38 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x22 children: inline
      frag 0 from BlockContainer start: 0, length: 0, rect: [8,8 236.65625x22] baseline: 15.796875
      frag 1 from TextNode start: 0, length: 1, rect: [244.65625,10 8x18] baseline: 13.796875
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      frag 4 from BlockContainer start: 0, length: 0, rect: [516,8 255.34375x22] baseline: 15.796875
      BlockContainer <input> at (8,8) content-size 236.65625x22 inline-block [BFC] children: inline
        frag 0 from BlockContainer start: 0, length: 0, rect: [13,10 94.375x18] baseline: 15.796875
        frag 1 from Label start: 0, length: 0, rect: [116.375,10 128.28125x18] baseline: 13.796875
        BlockContainer <button> at (13,10) content-size 94.375x18 inline-block [BFC] children: not-inline
          BlockContainer <(anonymous)> at (13,10) content-size 94.375x18 flex-container(column) [FFC] children: not-inline
            BlockContainer <(anonymous)> at (13,10) content-size 94.375x18 flex-item [BFC] children: inline
              frag 0 from TextNode start: 0, length: 14, rect: [13,10 94.375x18] baseline: 13.796875
                  "Select file..."
              TextNode <#text>
        Label <label> at (116.375,10) content-size 128.28125x18 inline-block [BFC] children: inline
          frag 0 from TextNode start: 0, length: 17, rect: [116.375,10 128.28125x18] baseline: 13.796875
              "No file selected."
          TextNode <#text>
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        frag 1 from Label start: 0, length: 0, rect: [370.375,10 137.625x18] baseline: 13.796875
        BlockContainer <button> at (257.65625,10) content-size 103.71875x18 inline-block [BFC] children: not-inline
          BlockContainer <(anonymous)> at (257.65625,10) content-size 103.71875x18 flex-container(column) [FFC] children: not-inline
            BlockContainer <(anonymous)> at (257.65625,10) content-size 103.71875x18 flex-item [BFC] children: inline
              frag 0 from TextNode start: 0, length: 15, rect: [257.65625,10 103.71875x18] baseline: 13.796875
                  "Select files..."
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        BlockContainer <button> at (521,10) content-size 103.71875x18 inline-block [BFC] children: not-inline
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ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x38]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x22]
      PaintableWithLines (BlockContainer<INPUT>) [8,8 236.65625x22]
        PaintableWithLines (BlockContainer<BUTTON>) [8,8 104.375x22]
          PaintableWithLines (BlockContainer(anonymous)) [13,10 94.375x18]
            PaintableWithLines (BlockContainer(anonymous)) [13,10 94.375x18]
              TextPaintable (TextNode<#text>)
        PaintableWithLines (Label<LABEL>) [112.375,10 132.28125x18]
          TextPaintable (TextNode<#text>)
      TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer<INPUT>) [252.65625,8 255.34375x22]
        PaintableWithLines (BlockContainer<BUTTON>) [252.65625,8 113.71875x22]
          PaintableWithLines (BlockContainer(anonymous)) [257.65625,10 103.71875x18]
            PaintableWithLines (BlockContainer(anonymous)) [257.65625,10 103.71875x18]
              TextPaintable (TextNode<#text>)
        PaintableWithLines (Label<LABEL>) [366.375,10 141.625x18]
          TextPaintable (TextNode<#text>)
      TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer<INPUT>#multiple) [516,8 255.34375x22]
        PaintableWithLines (BlockContainer<BUTTON>) [516,8 113.71875x22]
          PaintableWithLines (BlockContainer(anonymous)) [521,10 103.71875x18]
            PaintableWithLines (BlockContainer(anonymous)) [521,10 103.71875x18]
              TextPaintable (TextNode<#text>)
        PaintableWithLines (Label<LABEL>) [629.71875,10 141.625x18]
          TextPaintable (TextNode<#text>)
