Railroad Diagram Config Schema

https://mermaid.js.org/schemas/config.schema.json#/$defs/RailroadDiagramConfig

Configuration for Railroad (Syntax) Diagrams

Abstract	Extensible	Status	Identifiable	Custom Properties	Additional Properties	Access Restrictions	Defined In
Can be instantiated	No	Unknown status	No	Forbidden	Allowed	none	config.schema.json*

RailroadDiagramConfig Type

object (Railroad Diagram Config)

all of

• Base Diagram Config

RailroadDiagramConfig Properties

Property	Type	Required	Nullable	Defined by
compactMode	boolean	Optional	cannot be null	Mermaid Config
padding	number	Optional	cannot be null	Mermaid Config
verticalSeparation	number	Optional	cannot be null	Mermaid Config
horizontalSeparation	number	Optional	cannot be null	Mermaid Config
arcRadius	number	Optional	cannot be null	Mermaid Config
fontSize	number	Optional	cannot be null	Mermaid Config
fontFamily	string	Optional	cannot be null	Mermaid Config
terminalFill	string	Optional	cannot be null	Mermaid Config
terminalStroke	string	Optional	cannot be null	Mermaid Config
terminalTextColor	string	Optional	cannot be null	Mermaid Config
nonTerminalFill	string	Optional	cannot be null	Mermaid Config
nonTerminalStroke	string	Optional	cannot be null	Mermaid Config
nonTerminalTextColor	string	Optional	cannot be null	Mermaid Config
lineColor	string	Optional	cannot be null	Mermaid Config
strokeWidth	number	Optional	cannot be null	Mermaid Config
markerFill	string	Optional	cannot be null	Mermaid Config
commentFill	string	Optional	cannot be null	Mermaid Config
commentStroke	string	Optional	cannot be null	Mermaid Config
commentTextColor	string	Optional	cannot be null	Mermaid Config
specialFill	string	Optional	cannot be null	Mermaid Config
specialStroke	string	Optional	cannot be null	Mermaid Config
ruleNameColor	string	Optional	cannot be null	Mermaid Config
showMarkers	boolean	Optional	cannot be null	Mermaid Config
markerRadius	number	Optional	cannot be null	Mermaid Config

compactMode

Use compact layout mode

compactMode

• is optional

• Type: boolean

• cannot be null

• defined in: Mermaid Config

compactMode Type

boolean

compactMode Default Value

The default value is:

false

padding

Padding around elements

padding

• is optional

• Type: number

• cannot be null

• defined in: Mermaid Config

padding Type

number

padding Constraints

minimum: the value of this number must greater than or equal to: 0

padding Default Value

The default value is:

10

verticalSeparation

Vertical separation between elements

verticalSeparation

• is optional

• Type: number

• cannot be null

• defined in: Mermaid Config

verticalSeparation Type

number

verticalSeparation Constraints

minimum: the value of this number must greater than or equal to: 0

verticalSeparation Default Value

The default value is:

8

horizontalSeparation

Horizontal separation between elements

horizontalSeparation

• is optional

• Type: number

• cannot be null

• defined in: Mermaid Config

horizontalSeparation Type

number

horizontalSeparation Constraints

minimum: the value of this number must greater than or equal to: 0

horizontalSeparation Default Value

The default value is:

10

arcRadius

Radius for curved paths

arcRadius

• is optional

• Type: number

• cannot be null

• defined in: Mermaid Config

arcRadius Type

number

arcRadius Constraints

minimum: the value of this number must greater than or equal to: 0

arcRadius Default Value

The default value is:

10

fontSize

Font size for text

fontSize

• is optional

• Type: number

• cannot be null

• defined in: Mermaid Config

fontSize Type

number

fontSize Constraints

minimum: the value of this number must greater than or equal to: 0

fontSize Default Value

The default value is:

14

fontFamily

Font family for text

fontFamily

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

fontFamily Type

string

fontFamily Default Value

The default value is:

"monospace"

terminalFill

Fill color for terminal elements

terminalFill

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

terminalFill Type

string

terminalFill Default Value

The default value is:

"#FFFFC0"

terminalStroke

Stroke color for terminal elements

terminalStroke

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

terminalStroke Type

string

terminalStroke Default Value

The default value is:

"#000000"

terminalTextColor

Text color for terminal elements

terminalTextColor

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

terminalTextColor Type

string

terminalTextColor Default Value

The default value is:

"#000000"

nonTerminalFill

Fill color for non-terminal elements

nonTerminalFill

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

nonTerminalFill Type

string

nonTerminalFill Default Value

The default value is:

"#FFFFFF"

nonTerminalStroke

Stroke color for non-terminal elements

nonTerminalStroke

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

nonTerminalStroke Type

string

nonTerminalStroke Default Value

The default value is:

"#000000"

nonTerminalTextColor

Text color for non-terminal elements

nonTerminalTextColor

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

nonTerminalTextColor Type

string

nonTerminalTextColor Default Value

The default value is:

"#000000"

lineColor

Color for connection lines

lineColor

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

lineColor Type

string

lineColor Default Value

The default value is:

"#000000"

strokeWidth

Width of strokes

strokeWidth

• is optional

• Type: number

• cannot be null

• defined in: Mermaid Config

strokeWidth Type

number

strokeWidth Constraints

minimum: the value of this number must greater than or equal to: 0

strokeWidth Default Value

The default value is:

2

markerFill

Fill color for start/end markers

markerFill

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

markerFill Type

string

markerFill Default Value

The default value is:

"#000000"

commentFill

Fill color for comments

commentFill

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

commentFill Type

string

commentFill Default Value

The default value is:

"#E8E8E8"

commentStroke

Stroke color for comments

commentStroke

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

commentStroke Type

string

commentStroke Default Value

The default value is:

"#888888"

commentTextColor

Text color for comments

commentTextColor

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

commentTextColor Type

string

commentTextColor Default Value

The default value is:

"#666666"

specialFill

Fill color for special sequences

specialFill

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

specialFill Type

string

specialFill Default Value

The default value is:

"#F0E0FF"

specialStroke

Stroke color for special sequences

specialStroke

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

specialStroke Type

string

specialStroke Default Value

The default value is:

"#8800CC"

ruleNameColor

Color for rule names

ruleNameColor

• is optional

• Type: string

• cannot be null

• defined in: Mermaid Config

ruleNameColor Type

string

ruleNameColor Default Value

The default value is:

"#000066"

showMarkers

Show start/end markers

showMarkers

• is optional

• Type: boolean

• cannot be null

• defined in: Mermaid Config

showMarkers Type

boolean

showMarkers Default Value

The default value is:

true

markerRadius

Radius of start/end markers

markerRadius

• is optional

• Type: number

• cannot be null

• defined in: Mermaid Config

markerRadius Type

number

markerRadius Constraints

minimum: the value of this number must greater than or equal to: 0

markerRadius Default Value

The default value is:

5