Sankey
The Sankey chart supports the following visual channels:
source: source channel, supports multiple dimensions
target: target channel, supports multiple dimensions
color: color channel, supports multiple dimensions
size: size channel, supports one measure
label: label channel, supports multiple dimensions and multiple measures
tooltip: tooltip channel, supports multiple dimensions and multiple measures
Sankey chart, used to display flow relationships from source to target, with link width representing flow magnitude.
Applicable scenarios:
- Display flow relationships in a regular node-link structure
- Display path transfer after concatenating multiple source dimensions and multiple target dimensions
Data requirements:
- At least 1 source dimension or default dimension that can be mapped to source
- At least 1 target dimension
- At least 1 numeric field (measure) is required to map flow size
- The advanced pipeline needs to convert tidyData into a regular source / target / value structure consumable by sankey
chartType
Type: "sankey"
Sankey chart
Sankey chart, displaying regular source-target flow relationships and flow magnitude
Example 'sankey'
dataset
Type: Record[]
Dataset
An aggregated dataset that conforms to the TidyData specification, used to define the chart's data source and structure
Example [{fromRegion: 'North China', toRegion: 'East China', value: 30}]
dimensions
Type: SankeyDimension[] | undefined
Dimensions
Dimension configuration, used to define the source / target node structure and supports the source / target / color / detail / label / tooltip / row / column channels
Example [{id: 'fromRegion', alias: 'Source Region'}, {id: 'toRegion', alias: 'Target Region', encoding: 'target'}]
id
Type: string
Field ID corresponding to the dimension
alias
Type: string | undefined
Dimension alias
timeFormat
Type: TimeFormat | undefined
Dimension date format configuration
type
Type: "year" | "quarter" | "month" | "week" | "day" | "hour" | "minute" | "second"
Time granularity, determines the date display precision
encoding
Type: "color" | "detail" | "tooltip" | "label" | "row" | "column" | "source" | "target" | undefined
Channel to which the dimension is mapped
- source: supports mapping multiple dimensions to the source channel; the advanced stage concatenates them into an upstream node path
- target: supports mapping multiple dimensions to the target channel; the advanced stage concatenates them into a downstream node path
- color: supports mapping multiple dimensions to the color channel, used to generate the color category key for sankey
- detail: supports mapping multiple dimensions to the detail channel
- label: supports mapping multiple dimensions to the label channel
- tooltip: supports mapping multiple dimensions to the tooltip channel
- row: supports mapping multiple dimensions to the row channel, used for pivot charts
- column: supports mapping multiple dimensions to the column channel, used for pivot charts
measures
Type: SankeyMeasure[] | undefined
Measures
Measure configuration, used to define flow size and supports the size / detail / label / tooltip channels
Example [{id: 'sales', alias: 'Sales'}]
id
Type: string
Measure ID, must be unique
alias
Type: string | undefined
Measure alias, duplicates are allowed; when not set, alias defaults to id
autoFormat
Type: boolean | undefined
Automatic number formatting, enabled by default, highest priority
When autoFormat=true, it overrides all numFormat configurations
When enabled, chart data labels and tooltips automatically select an appropriate format based on measure values and locale
Formatting rules: decimal numbers with compact notation enabled, minimum 0 decimal places, maximum 2 decimal places, automatic rounding, using the browser's Intl.NumberFormat implementation
For example:
- locale=zh-CN: 749740.264 → 74.45万
- locale=en-US: 749740.264 → 744.5K
numFormat
Type: NumFormat | undefined
Custom number formatting for measures; automatically applied to labels and tooltips
Note: To use custom formatting, you must explicitly set autoFormat=false; otherwise autoFormat will override this config
type
Type: "number" | "percent" | "permille" | "scientific" | undefined
Number format type, supports: number (decimal), percent (%), permille (‰), scientific notation
ratio
Type: number | undefined
Number format ratio, cannot be 0
Example - 100000 converts to 10万, ratio:10000, symbol:"万" - 100000 converts to 10K, ratio:1000, symbol:"K"
symbol
Type: string | undefined
Number format symbol, e.g. %, ‰
Example - 100000 converts to 10万, ratio:10000, symbol:"万" - 100000 converts to 10K, ratio:1000, symbol:"K"
thousandSeparator
Type: boolean | undefined
Thousands separator for number formatting
suffix
Type: string | undefined
Number format suffix
prefix
Type: string | undefined
Number format prefix
fractionDigits
Type: number | undefined
Decimal places for number formatting, using the browser's Intl.NumberFormat minimumFractionDigits and maximumFractionDigits; lower priority than significantDigits
Example - 1234.5678 converts to 1235, fractionDigits:0 (roundingMode:halfCeil) - 1234.5678 converts to 1234.6, fractionDigits:1 (roundingMode:halfCeil) - 1234.5678 converts to 1234.57, fractionDigits:2 (roundingMode:halfCeil) - 1234.5678 converts to 1230.568, fractionDigits:3 (roundingMode:halfCeil) - 1234.5678 converts to 1234.5678, fractionDigits:4 (roundingMode:halfCeil) - 1234.5678 converts to 1234.56780, fractionDigits:5 (roundingMode:halfCeil)
significantDigits
Type: number | undefined
Significant digits for number formatting, using the browser's Intl.NumberFormat minimumSignificantDigits and maximumSignificantDigits; higher priority than fractionDigits
Example - 1234.5678 converts to 1000, significantDigits:1 - 1234.5678 converts to 1200, significantDigits:2 - 1234.5678 converts to 1230, significantDigits:3 - 1234.5678 converts to 1234, significantDigits:4 - 1234.5678 converts to 1234.6, significantDigits:5 (roundingMode:halfCeil) - 1234.5678 converts to 1234.57, significantDigits:6 (roundingMode:halfCeil) - 1234.5678 converts to 1234.568, significantDigits:7 (roundingMode:halfCeil) - 1234.5678 converts to 1234.5678, significantDigits:8 (roundingMode:halfCeil)
roundingPriority
Type: "morePrecision" | "lessPrecision" | undefined
Rounding priority for number formatting when both significantDigits and fractionDigits are set; uses the browser's Intl.NumberFormat, following the same rules as Intl.NumberFormat's roundingPriority
Example - 1234.5678 converts to 1230, significantDigits:3 (roundingPriority:lessPrecision) - 1234.5678 converts to 1234.5678, significantDigits:3 (roundingPriority:morePrecision)
roundingMode
Type: "floor" | "ceil" | "expand" | "trunc" | "halfCeil" | "halfFloor" | "halfExpand" | "halfTrunc" | "halfEven" | undefined
Rounding mode for number formatting, using the browser's Intl.NumberFormat, following the same rules as Intl.NumberFormat's roundingMode
format
Type: NumFormat | undefined
type
Type: "number" | "percent" | "permille" | "scientific" | undefined
Number format type, supports: number (decimal), percent (%), permille (‰), scientific notation
ratio
Type: number | undefined
Number format ratio, cannot be 0
Example - 100000 converts to 10万, ratio:10000, symbol:"万" - 100000 converts to 10K, ratio:1000, symbol:"K"
symbol
Type: string | undefined
Number format symbol, e.g. %, ‰
Example - 100000 converts to 10万, ratio:10000, symbol:"万" - 100000 converts to 10K, ratio:1000, symbol:"K"
thousandSeparator
Type: boolean | undefined
Thousands separator for number formatting
suffix
Type: string | undefined
Number format suffix
prefix
Type: string | undefined
Number format prefix
fractionDigits
Type: number | undefined
Decimal places for number formatting, using the browser's Intl.NumberFormat minimumFractionDigits and maximumFractionDigits; lower priority than significantDigits
Example - 1234.5678 converts to 1235, fractionDigits:0 (roundingMode:halfCeil) - 1234.5678 converts to 1234.6, fractionDigits:1 (roundingMode:halfCeil) - 1234.5678 converts to 1234.57, fractionDigits:2 (roundingMode:halfCeil) - 1234.5678 converts to 1230.568, fractionDigits:3 (roundingMode:halfCeil) - 1234.5678 converts to 1234.5678, fractionDigits:4 (roundingMode:halfCeil) - 1234.5678 converts to 1234.56780, fractionDigits:5 (roundingMode:halfCeil)
significantDigits
Type: number | undefined
Significant digits for number formatting, using the browser's Intl.NumberFormat minimumSignificantDigits and maximumSignificantDigits; higher priority than fractionDigits
Example - 1234.5678 converts to 1000, significantDigits:1 - 1234.5678 converts to 1200, significantDigits:2 - 1234.5678 converts to 1230, significantDigits:3 - 1234.5678 converts to 1234, significantDigits:4 - 1234.5678 converts to 1234.6, significantDigits:5 (roundingMode:halfCeil) - 1234.5678 converts to 1234.57, significantDigits:6 (roundingMode:halfCeil) - 1234.5678 converts to 1234.568, significantDigits:7 (roundingMode:halfCeil) - 1234.5678 converts to 1234.5678, significantDigits:8 (roundingMode:halfCeil)
roundingPriority
Type: "morePrecision" | "lessPrecision" | undefined
Rounding priority for number formatting when both significantDigits and fractionDigits are set; uses the browser's Intl.NumberFormat, following the same rules as Intl.NumberFormat's roundingPriority
Example - 1234.5678 converts to 1230, significantDigits:3 (roundingPriority:lessPrecision) - 1234.5678 converts to 1234.5678, significantDigits:3 (roundingPriority:morePrecision)
roundingMode
Type: "floor" | "ceil" | "expand" | "trunc" | "halfCeil" | "halfFloor" | "halfExpand" | "halfTrunc" | "halfEven" | undefined
Rounding mode for number formatting, using the browser's Intl.NumberFormat, following the same rules as Intl.NumberFormat's roundingMode
encoding
Type: "detail" | "tooltip" | "label" | "size" | undefined
Channel to which the measure is mapped
- size: measure mapped to the edge width / flow size channel
- label: measure mapped to the label channel
- tooltip: measure mapped to the tooltip channel
parentId
Type: string | undefined
In flat measure configuration form, builds a tree-shaped measure group. parentId points to the id of the parent measure group, used for building the measure tree
There are two ways to configure the measure tree: Option 1 is directly configuring a measure tree with children; Option 2 is configuring a flat measure list with parentId. These two methods cannot be used simultaneously
page
Type: Page | undefined
Pagination configuration
Used to specify the field name for pagination; must be a dimension
field
Type: string
Pagination field; specifies the field name for pagination, must be a dimension
currentValue
Type: string
Current pagination value; specifies the value used to determine the current page
Example '2023-01-01'
backgroundColor
Type: BackgroundColor
Chart background color
Background color can be a color string, such as 'red' or 'blue', or a hex, rgb, or rgba value, such as '#ff0000' or 'rgba(255,0,0,0.5)'
color
Type: Color | undefined
Color
Color configuration, used to define the chart's color scheme, including color lists, color mappings, and color gradients
colorScheme
Type: string[] | undefined
Discrete color scheme used to define the colors of different elements in the chart
Example ['#FFCDD2,#F8BBD0,#E1BEE7,#D1C4E9,#C5CAE9,#BBDEFB,#B3E5FC,#B2EBF2,#B2DFDB,#C8E6C9,#DCEDC8,#F0F4C3,#FFF9C4,#FFECB3,#FFE0B2']
linearColorScheme
Type: string[] | undefined
Linear gradient color scheme used to define the colors of different elements in the chart
Example ['#FFCDD2, #F8BBD0]
colorMapping
Type: Record<string, string> | undefined
Color mapping used to map data values to specific colors
Example { 'profit': 'red', 'sales': 'blue', }
positiveColor
Type: string | undefined
Positive/negative color configuration; defines the color for positive values in the chart
negativeColor
Type: string | undefined
Positive/negative color configuration; defines the color for negative values in the chart
label
Type: Label | undefined
Label
Label configuration, used to define chart data labels, including position, format, style, etc.
enable
Type: false | true
Whether label functionality is enabled
wrap
Type: boolean | undefined
Whether labels wrap to the next line
showValue
Type: boolean | undefined
Whether labels display measure values
In multi-measure scenarios, there is no concern about conflicting values, because all plot-related measures go through foldMeasures processing and are merged into one measure representing a single data point
Note: encoding's label has higher priority; this config does not affect encoding's label
showValuePercent
Type: boolean | undefined
Whether labels display the percentage of measure values
In multi-measure scenarios, there is no concern about conflicting values, because all plot-related measures go through foldMeasures processing and are merged into one measure representing a single data point
Note: encoding's label has higher priority; this config does not affect encoding's label
showDimension
Type: boolean | undefined
Whether labels display dimension labels
Display all dimension labels
Note: encoding's label has higher priority; this config does not affect encoding's label
autoFormat
Type: boolean | undefined
Whether label values are automatically formatted; when autoFormat is true, numFormat configuration is ignored
numFormat
Type: NumFormat | undefined
Label value format configuration; merged with the format in measure, where measure's format has higher priority. numFormat priority is lower than autoFormat
type
Type: "number" | "percent" | "permille" | "scientific" | undefined
Number format type, supports: number (decimal), percent (%), permille (‰), scientific notation
ratio
Type: number | undefined
Number format ratio, cannot be 0
Example - 100000 converts to 10万, ratio:10000, symbol:"万" - 100000 converts to 10K, ratio:1000, symbol:"K"
symbol
Type: string | undefined
Number format symbol, e.g. %, ‰
Example - 100000 converts to 10万, ratio:10000, symbol:"万" - 100000 converts to 10K, ratio:1000, symbol:"K"
thousandSeparator
Type: boolean | undefined
Thousands separator for number formatting
suffix
Type: string | undefined
Number format suffix
prefix
Type: string | undefined
Number format prefix
fractionDigits
Type: number | undefined
Decimal places for number formatting, using the browser's Intl.NumberFormat minimumFractionDigits and maximumFractionDigits; lower priority than significantDigits
Example - 1234.5678 converts to 1235, fractionDigits:0 (roundingMode:halfCeil) - 1234.5678 converts to 1234.6, fractionDigits:1 (roundingMode:halfCeil) - 1234.5678 converts to 1234.57, fractionDigits:2 (roundingMode:halfCeil) - 1234.5678 converts to 1230.568, fractionDigits:3 (roundingMode:halfCeil) - 1234.5678 converts to 1234.5678, fractionDigits:4 (roundingMode:halfCeil) - 1234.5678 converts to 1234.56780, fractionDigits:5 (roundingMode:halfCeil)
significantDigits
Type: number | undefined
Significant digits for number formatting, using the browser's Intl.NumberFormat minimumSignificantDigits and maximumSignificantDigits; higher priority than fractionDigits
Example - 1234.5678 converts to 1000, significantDigits:1 - 1234.5678 converts to 1200, significantDigits:2 - 1234.5678 converts to 1230, significantDigits:3 - 1234.5678 converts to 1234, significantDigits:4 - 1234.5678 converts to 1234.6, significantDigits:5 (roundingMode:halfCeil) - 1234.5678 converts to 1234.57, significantDigits:6 (roundingMode:halfCeil) - 1234.5678 converts to 1234.568, significantDigits:7 (roundingMode:halfCeil) - 1234.5678 converts to 1234.5678, significantDigits:8 (roundingMode:halfCeil)
roundingPriority
Type: "morePrecision" | "lessPrecision" | undefined
Rounding priority for number formatting when both significantDigits and fractionDigits are set; uses the browser's Intl.NumberFormat, following the same rules as Intl.NumberFormat's roundingPriority
Example - 1234.5678 converts to 1230, significantDigits:3 (roundingPriority:lessPrecision) - 1234.5678 converts to 1234.5678, significantDigits:3 (roundingPriority:morePrecision)
roundingMode
Type: "floor" | "ceil" | "expand" | "trunc" | "halfCeil" | "halfFloor" | "halfExpand" | "halfTrunc" | "halfEven" | undefined
Rounding mode for number formatting, using the browser's Intl.NumberFormat, following the same rules as Intl.NumberFormat's roundingMode
labelFontSize
Type: number | undefined
Label font size
labelFontWeight
Type: string | number | undefined
Label font weight
labelBackgroundColor
Type: string | undefined
Label background color
labelStroke
Type: string | undefined
Label stroke color
labelColor
Type: string | undefined
Label font color
labelColorSmartInvert
Type: boolean | undefined
Whether the label font color automatically inverts based on the graphical element color
labelPosition
Type: "inside" | "outside" | undefined
Label position
labelOverlap
Type: boolean | undefined
Whether the label anti-overlap function is enabled
selector
Type: Selector | Selectors | undefined
Label filtering; the default relationship between selectors is OR
field
Type: string
Dimension field; ID of a specific dimension item
operator
Type: "in" | "not in" | undefined
Operator
- in: Select data items whose dimension field value is within the specified value
- not in: Select data items whose dimension field value is not within the specified value
op
Type: "in" | "not in" | undefined
Operator
- in: Select data items whose dimension field value is within the specified value
- not in: Select data items whose dimension field value is not within the specified value
Same as operator
value
Type: string | number | (string | number)[]
Select dimension field values; supports arrays
dynamicFilter
Type: ChartDynamicFilter | undefined
Dynamic filter (AI-generated code execution)
Implements complex data filtering logic via AI-generated JavaScript code
Core capabilities:
- Supports arbitrarily complex data filtering conditions
- Use built-in utility functions for data manipulation
- Secure execution in the browser environment (Web Worker sandbox)
Environmental requirements: Supports browser environments only; Node.js environments will use fallback
Note: selector and dynamicFilter cannot be used simultaneously; dynamicFilter has higher priority
Chart dynamic filter configuration
Implements filtering of chart marks (bars, points, etc.) via AI-generated JavaScript code
type
Type: "row-with-field"
description
Type: string | undefined
User's filtering requirement description (natural language)
Example "Highlight columns with sales greater than 1000"
"Highlight the column with the highest profit margin in each area"
code
Type: string
AI-generated JavaScript filtering code
- Only built-in utility functions can be used (accessed via _ or R)
- Input parameters: data (array), where each item includes a __row_index field representing the row number
- Must return an array of row index and field combinations: Array<{ __row_index: number, field: string }>
- __row_index represents the row number of the original data item; field represents the field to be highlighted
- Forbidden: eval, Function, asynchronous operations, DOM API, network requests
Example Highlight the sales field of data items with sales greater than 1000
Highlight data items with the highest profit margin in each area
Highlight data items filtered by multiple conditions
fallback
Type: Selector | Selectors | undefined
Fallback plan when code execution fails or the environment is not supported
field
Type: string
Dimension field; ID of a specific dimension item
operator
Type: "in" | "not in" | undefined
Operator
- in: Select data items whose dimension field value is within the specified value
- not in: Select data items whose dimension field value is not within the specified value
op
Type: "in" | "not in" | undefined
Operator
- in: Select data items whose dimension field value is within the specified value
- not in: Select data items whose dimension field value is not within the specified value
Same as operator
value
Type: string | number | (string | number)[]
Select dimension field values; supports arrays
result
Type: DynamicFilterExecutionResult<RowWithFieldRes> | undefined
Dynamic filter execution result (runtime field)
Written during the prepare() phase; read-only at runtime
success
Type: false | true
data
Type: T[] | undefined
error
Type: string | undefined
legend
Type: Legend | undefined
Legend
Legend configuration, used to define the display, position, and style of the Sankey chart's color legend
enable
Type: boolean | undefined
Whether legend functionality is enabled
Example enable: true
border
Type: boolean | undefined
Whether legend border is enabled
Only effective for discrete legends
Example border: true
labelColor
Type: string | undefined
Legend font color
pagerIconColor
Type: string | undefined
Pager icon color
pagerIconDisableColor
Type: string | undefined
Pager icon disabled color
labelFontSize
Type: number | undefined
Legend font size
Example labelFontSize: 10
labelFontColor
Type: string | undefined
Legend font color
labelFontWeight
Type: string | number | undefined
Legend font weight
Example labelFontWeight: 400
shapeType
Type: "circle" | "cross" | "diamond" | "square" | "arrow" | "arrow2Left" | "arrow2Right" | "wedge" | "thinTriangle" | "triangle" | "triangleUp" | "triangleDown" | "triangleRight" | "triangleLeft" | "stroke" | "star" | "wye" | "rect" | "arrowLeft" | "arrowRight" | "rectRound" | "roundLine" | undefined
Legend shape
Only effective for discrete legends
Example shapeType: 'circle'
position
Type: "left" | "leftTop" | "leftBottom" | "lt" | "lb" | "top" | "topLeft" | "topRight" | "tl" | "tr" | "right" | "rightTop" | "rightBottom" | "rt" | "rb" | "bottom" | "bottomLeft" | "bottomRight" | "bl" | "br" | undefined
Legend position
Example position: 'rightTop'
maxSize
Type: number | undefined
Maximum number of columns or rows for the legend when there are many legend items
If position is horizontal (bottom, bottomLeft, bottomRight, bl, br, top, topLeft, topRight, tl, tr), maxSize controls the number of displayed columns
If position is vertical (left, leftTop, leftBottom, lt, lb, right, rightTop, rightBottom, rt, rb), maxSize controls the number of displayed rows
Only effective for discrete legends
Example maxSize: 2
tooltip
Type: Tooltip | undefined
Tooltip
Tooltip configuration, used to define the chart's tooltips, including content, format, style, etc.
enable
Type: false | true
Whether tooltips are enabled
theme
Type: Theme | undefined
Chart theme
Theme
Built-in light and dark themes; new themes can be customized via registerTheme.
length
Type: number
brand
Type: brand
locale
Type: "zh-CN" | "en-US" | "ja-JP" | "de-DE" | "id-ID" | "fr-FR" | "ko-KR" | "vi-VN" | undefined
Language
Chart language configuration, supports 'zh-CN' and 'en-US'