Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x58 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x42 children: not-inline
BlockContainer <button.btn.fixed-width> at (13,10) content-size 190x17 children: not-inline
BlockContainer <(anonymous)> at (13,10) content-size 190x17 flex-container(column) [FFC] children: not-inline
BlockContainer <(anonymous)> at (13,10) content-size 190x17 flex-item [BFC] children: inline
frag 0 from TextNode start: 0, length: 11, rect: [61,10 94.921875x17] baseline: 13.296875
"200px width"
TextNode <#text>
BlockContainer <button.btn> at (13,31) content-size 324.671875x17 children: not-inline
BlockContainer <(anonymous)> at (13,31) content-size 324.671875x17 flex-container(column) [FFC] children: not-inline
BlockContainer <(anonymous)> at (13,31) content-size 324.671875x17 flex-item [BFC] children: inline
frag 0 from TextNode start: 0, length: 39, rect: [13,31 324.671875x17] baseline: 13.296875
"auto width should behave as fit-content"
TextNode <#text>
ViewportPaintable (Viewport<#document>) [0,0 800x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x58]
PaintableWithLines (BlockContainer<BODY>) [8,8 784x42]
PaintableWithLines (BlockContainer<BUTTON>.btn.fixed-width) [8,8 200x21]
PaintableWithLines (BlockContainer(anonymous)) [13,10 190x17]
PaintableWithLines (BlockContainer(anonymous)) [13,10 190x17]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<BUTTON>.btn) [8,29 334.671875x21]
PaintableWithLines (BlockContainer(anonymous)) [13,31 324.671875x17]
PaintableWithLines (BlockContainer(anonymous)) [13,31 324.671875x17]
TextPaintable (TextNode<#text>)