Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline BlockContainer at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline BlockContainer at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline BlockContainer <(anonymous)> at [0,0] [0+0+0 800 0+0+0] [0+0+0 0 0+0+0] children: inline TextNode <#text> (not painted) TextNode <#text> (not painted) Box
at [0,0] flex-container(column) [0+0+0 800 0+0+0] [0+0+0 18 0+0+0] [FFC] children: not-inline BlockContainer <(anonymous)> (not painted) [BFC] children: inline TextNode <#text> (not painted) BlockContainer
at [0,0] flex-item [0+0+0 800 0+0+0] [0+0+0 18 0+0+0] [BFC] children: inline frag 0 from TextNode start: 0, length: 1, rect: [0,0 11.5625x18] baseline: 13.796875 "X" TextNode <#text> (not painted) BlockContainer <(anonymous)> (not painted) [BFC] children: inline TextNode <#text> (not painted) BlockContainer <(anonymous)> at [0,18] [0+0+0 800 0+0+0] [0+0+0 0 0+0+0] children: inline TextNode <#text> (not painted) ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x600] PaintableWithLines (BlockContainer(anonymous)) [0,0 800x0] PaintableBox (Box
) [0,0 800x18] PaintableWithLines (BlockContainer
) [0,0 800x18] TextPaintable (TextNode<#text>) PaintableWithLines (BlockContainer(anonymous)) [0,18 800x0] SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto) SC for BlockContainer [0,0 800x600] [children: 0] (z-index: auto)