This section documents API usage specific to this template, so for an introduction we suggest you refer to the generic API documentation instead.

Template data

There are three different formats in which you can supply data to this template. The most convenient for you to use likely depends on the source of your data, as described below.

1. Array of arrays, and a bindings object

You can supply arrays of arrays to opts.data, which might look like:

{
    data: {
        horserace: [
            [ "HorseraceColumn1Value1", "HorseraceColumn2Value1",
            [ "HorseraceColumn1Value2", "HorseraceColumn2Value2",
            [ "HorseraceColumn1Value3", "HorseraceColumn2Value3",
            ...
        ]
    }
}

where each array of arrays represents the rows in a data sheet.

To tell the API how the values from each column should be associated with the keys that the template is expecting, you must also supply an object attached to opts.bindings. (The meanings of the keys in the bindings object are documented below.) The minimal bindings you can supply for this template are as shown in this example:

{
    template: "@flourish/horserace",
    version: "5",
    bindings: {
        horserace: {
            name: 0, // index of a column in your data
        }
    },
    data: {
        horserace: [
            [ "HorseraceColumn1Value1", "HorseraceColumn2Value1",
            [ "HorseraceColumn1Value2", "HorseraceColumn2Value2",
            [ "HorseraceColumn1Value3", "HorseraceColumn2Value3",
            ...
        ]
    }
}

All possible bindings that you can supply are shown in this example:

{
    template: "@flourish/horserace",
    version: "5",
    bindings: {
        horserace: {
            name: 0, // index of a column in your data
            pic: 1, // index of a column in your data
            stages: [2, 3, ...], // index(es) of column(s) in your data
            filter: 4, // index of a column in your data
        }
    },
    data: {
        horserace: [
            [ "HorseraceColumn1Value1", "HorseraceColumn2Value1",
            [ "HorseraceColumn1Value2", "HorseraceColumn2Value2",
            [ "HorseraceColumn1Value3", "HorseraceColumn2Value3",
            ...
        ]
    }
}

2. Array of objects with arbitrary keys, and a bindings object

This format is most likely useful when you have data from an external source, such as CSV data loaded from d3-dsv. You should supply this attached to the opts.data, which might look like:

{
        horserace: [
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            ...
        ]
    }

... but with the keys being the column headers from your source data instead. You must also supply an object attached to opts.bindings. The minimal bindings you can supply for this template are as shown in this example:

{
    template: "@flourish/horserace",
    version: "5",
    bindings: {
        horserace: {
            name: "HorseraceHeader1",
        }
    },
    data: {
        horserace: [
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            ...
        ]
    }
}

All possible bindings that you can supply are shown in this example:

{
    template: "@flourish/horserace",
    version: "5",
    bindings: {
        horserace: {
            name: "HorseraceHeader1",
            pic: "HorseraceHeader2",
            stages: ["HorseraceHeader3", "HorseraceHeader4", ...],
            filter: "HorseraceHeader5",
        }
    },
    data: {
        horserace: [
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            { "HorseraceHeader1": ..., "HorseraceHeader2": ..., ... },
            ...
        ]
    }
}

(As before, the keys containing "Header" would be replaced by column names from your data source.)

3. Array of objects with template-defined keys

There is an alternative format you can use, which is likely to be easier to use if your data is not from a spreadsheet source. With this alternative format you supply your data to the template as an array of objects, attached to opts.data, where the keys must be those used by the template, as documented below. In this case there is no need to supply a bindings object, since the key names are already those expected by the template. The required properties in the data object are as follows (scroll down for a description of what each property is):

{
    template: "@flourish/horserace",
    version: "5",
    data: {
    horserace: [
        {
            name: ...,
            stages: [...]
        },
        ...
    ]
},
    ...
}

And the full list of all possible properties is as follows:

{
    template: "@flourish/horserace",
    version: "5",
    data: {
    horserace: [
        {
            name: ...,
            pic: ...,
            stages: [...],
            filter: ...
        },
        ...
    ]
},
    ...
}

Meanings of the template data keys:

• horserace.name: The name of each entrant
• horserace.pic: The URL of the image to use
• horserace.stages: Raw scores, which will be automatically converted to ranks. Column names will be used to populate the x-axis of the chart.
• horserace.filter: Hide/show entrants based on the values in this column.

Template settings

Options for opts.state.

Scoring type

value_type string

Chart mode to show on load.

higher_scores_win boolean

Data type. Useful for data where lower scores beat higher scores – e.g. race times

ties_mode string

Rank ties mode. What rank ranks should be given when there are ties? See https://en.wikipedia.org/wiki/Ranking for explanation of names.

Chart sizing

height_mode string

Height mode. In "Fill space" mode, the lines will be spread out over the available chart height, which by default will be the standard Flourish chart sizes for any given screen width. In this mode the circles/images might overlap if you have lots of lines. "Match data" mode will resize the embedded graphic so there is enough vertical space to avoid overlaps. (Note this won't have any effect if you embed the graphic as a fixed height.) "Auto" switches between the two modes depending on the number of lines.

margin_top number

Top.

margin_right number

Right.

margin_bottom number

Bottom.

margin_left number

Left.

margin_right_mobile number

Right (mobile).

Controls

show_buttons boolean

Ranks/scores toggle.

show_replay boolean

Replay button.

filter_control_type string

Filter control type. Only used when a filter column is specified. "Auto" creates a button group if there is enough space, or a dropdown if there is not.

filter_width number

Control width. Width of control if sufficient space is available.

filter_include_all boolean

Include “All” option.

label_ranks string

“Ranks” label.

label_scores string

“Scores” label.

label_replay string

“Replay” label.

filter_all_label string

“All” label.

Colours

color.palette colors

Palette.

color.extend boolean

Auto-extend. Automatically generate additional colours when needed to avoid the palette colours being used more than once. Added colours are based on the average lightness and chroma values of the palette. This works best if the palette’s colours do not have very high or low saturation.

color.advanced boolean

Fine tune. Fine tune how additional colours are added to the palette.

color.hue_rotation_angle number

Hue rotation for added colours. Angle, in degrees in HCL colourspace, between one generated colour and the next. The default value, ~360/(Golden ratio), ensures adjacent hues are not too similar.

color.custom_palette text

Custom overrides. Type the name of the entity whose colour you want to set, a colon and then a colour (using a name, hex-code or rgb declaration). Multiple colours can be set using multiple lines. For example:

---

Party 1: red
Party 2: #4455AA
Party 3: rgb(30,168,26)

Line styles

line_width number

Line width.

line_opacity number

Opacity.

curve string

Curve.

shade boolean

Shading behind line.

shade_width number

Width. Width in pixels

shade_opacity number

Opacity. Set to a value between 0 and 1

missing boolean

Lines between missing data points.

missing_opacity number

Opacity.

missing_width number

Width.

missing_dash_width number

Dash width.

missing_dash_space number

Dash space.

Circle styles

start_circle_r number

Start radius.

end_circle_r number

End radius.

end_circle_stroke number

End stroke.

end_circle_stroke_bg boolean

Stroke color.

horse_images boolean

Image inside circle.

Label styles

rank_font_size number

Rank font size.

label_font_size number

Label font size.

rank_outside_picture boolean

Rank position.

hide_labels boolean

Show label.

label_format.prefix string

Prefix. Text to place in front of number

label_format.suffix string

Suffix. Text to place after number

label_format.n_dec number

Decimal places. Use negative integers to round to positive powers of ten (eg -2 rounds to the nearest 100)

label_format.strip_zeros boolean

Remove trailing zeros.

label_format.strip_separator boolean

Hide thousands separator below 10,000. Turn off if you want four-digit numbers to include a separator, e.g. “1,234” rather than “1234”.

label_format.transform_labels boolean

Multiply/divide values.

label_format.transform string

label_format.multiply_divide_constant number

label_format.exponentiate_constant number

Y axis

y_axis_label_colors color

Label color.

y_axis_label_size number

Label size.

y_axis_stroke_color color

Stroke color.

y_axis_min number

Min score.

y_axis_max number

Max score.

y_axis_min_rank number

Min rank.

y_axis_max_rank number

Max rank.

y_axis_format.prefix string

Prefix. Text to place in front of number

y_axis_format.suffix string

Suffix. Text to place after number

y_axis_format.n_dec number

Decimal places. Use negative integers to round to positive powers of ten (eg -2 rounds to the nearest 100)

y_axis_format.strip_zeros boolean

Remove trailing zeros.

y_axis_format.strip_separator boolean

Hide thousands separator below 10,000. Turn off if you want four-digit numbers to include a separator, e.g. “1,234” rather than “1234”.

y_axis_format.transform_labels boolean

Multiply/divide values.

y_axis_format.transform string

y_axis_format.multiply_divide_constant number

y_axis_format.exponentiate_constant number

X axis

x_axis_label_color color

Label color.

x_axis_label_size number

Label size.

x_axis_rotate string

Label rotation.

Animation

stage_duration number

Animation duration. The “race” animation length, in milliseconds per stage

update_duration number

Mode duration. The animation duration when change between ranks and scores modes

Number formatting

localization.input_decimal_separator string

Decimal separator in data sheet. Used for interpreting your data. Only change if data is not displaying on the chart as expected.

localization.output_separators string

Number format to display. How the numbers should appear on chart labels

Layout

Layout

layout.body_font font

Font.

layout.max_width number

Maximum width. Leave blank to stretch to container width

layout.margin number

Margin.

layout.background_color_enabled boolean

Color.

layout.background_image_enabled boolean

Image.

layout.background_color color

Color.

layout.background_image_src url

Image URL.

layout.background_image_size string

Size.

layout.background_image_position string

Position.

layout.layout_order string

Layout order.

layout.space_between_sections string

Space between sections.

layout.space_between_sections_custom number

Custom.

Header

layout.header_align string

Alignment.

layout.title string

layout.title_styling boolean

Change title styles.

layout.title_size string

Size.

layout.title_size_custom number

Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3

layout.title_weight string

Weight.

layout.title_color color

Color.

layout.title_line_height number

Line height.

layout.subtitle string

layout.subtitle_styling boolean

Change subtitle styles.

layout.subtitle_size string

Size.

layout.subtitle_size_custom number

Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3

layout.subtitle_weight string

Weight.

layout.subtitle_color color

Color.

layout.subtitle_line_height number

Line height.

layout.subtitle_space_above string

Space above.

layout.subtitle_space_above_custom number

Custom.

layout.text string

layout.text_styling boolean

Change text styles.

layout.text_size string

Size.

layout.text_size_custom number

Custom. Specify a custom responsive font size. Best results will be with values between 1.2 and 3

layout.text_weight string

Weight.

layout.text_color color

Color.

layout.text_line_height number

Line height.

layout.text_space_above string

Space above.

layout.text_space_above_custom number

Custom.

Footer

layout.source_name string

Source name.

layout.source_url string

Source url.

layout.multiple_sources boolean

Multiple sources.

layout.source_name_2 string

Source name.

layout.source_url_2 string

Source url.

layout.source_name_3 string

Source name.

layout.source_url_3 string

Source url.

layout.source_label string

Source label.

layout.note string

Note.

layout.size number

Size.

layout.color color

Color.

layout.footer_align string

Alignment.

layout.logo_url url

Image.

layout.logo_link_url string

Link.

layout.logo_height number

Height.

layout.logo_margin number

Margin.

layout.logo_order string

Position.

layout.footer_align_vertical string

V. align.