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 16 0+0+0] [BFC] children: not-inline BlockContainer at [8,8] [8+0+0 784 0+0+8] [8+0+0 0 0+0+8] children: inline TextNode <#text> (not painted) BlockContainer <(anonymous)> at [0,0] positioned [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline Box at [358.84375,292] positioned flex-container(row) [339.84375+3+16 82.3125 16+3+339.84375] [273+3+16 16 16+3+273] [FFC] children: not-inline BlockContainer <(anonymous)> (not painted) [BFC] children: inline TextNode <#text> (not painted) BlockContainer at [358.84375,292] flex-item [0+0+0 82.3125 0+0+0] [0+0+0 16 0+0+0] [BFC] children: inline frag 0 from TextNode start: 0, length: 10, rect: [358.84375,292 82.3125x16] baseline: 12.796875 "I'm a node" TextNode <#text> (not painted) BlockContainer <(anonymous)> (not painted) [BFC] children: inline TextNode <#text> (not painted) ViewportPaintable (Viewport<#document>) [0,0 800x600] PaintableWithLines (BlockContainer) [0,0 800x16] PaintableWithLines (BlockContainer) [8,8 784x0] PaintableWithLines (BlockContainer(anonymous)) [0,0 800x600] Paintable (Box#modal) [339.84375,273 120.3125x54] PaintableWithLines (BlockContainer) [358.84375,292 82.3125x16] SC for Viewport<#document> [0,0 800x600] (z-index: auto) SC for BlockContainer [0,0 800x16] (z-index: auto) SC for BlockContainer(anonymous) [0,0 800x600] (z-index: auto) SC for Box#modal [358.84375,292 82.3125x16] (z-index: auto)