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: {
        data: [
            [ "DataColumn1Value1", "DataColumn2Value1",
            [ "DataColumn1Value2", "DataColumn2Value2",
            [ "DataColumn1Value3", "DataColumn2Value3",
            ...
        ],
        captions: [
            [ "CaptionsColumn1Value1", "CaptionsColumn2Value1",
            [ "CaptionsColumn1Value2", "CaptionsColumn2Value2",
            [ "CaptionsColumn1Value3", "CaptionsColumn2Value3",
            ...
        ]
    }
}

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/bar-chart-race",
    version: "14",
    bindings: {
        data: {
            label: 0, // index of a column in your data
        },
        captions: {
            
        }
    },
    data: {
        data: [
            [ "DataColumn1Value1", "DataColumn2Value1",
            [ "DataColumn1Value2", "DataColumn2Value2",
            [ "DataColumn1Value3", "DataColumn2Value3",
            ...
        ],
        captions: [
            [ "CaptionsColumn1Value1", "CaptionsColumn2Value1",
            [ "CaptionsColumn1Value2", "CaptionsColumn2Value2",
            [ "CaptionsColumn1Value3", "CaptionsColumn2Value3",
            ...
        ]
    }
}

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

{
    template: "@flourish/bar-chart-race",
    version: "14",
    bindings: {
        data: {
            label: 0, // index of a column in your data
            values: [1, 2, ...], // index(es) of column(s) in your data
            category: 3, // index of a column in your data
            image: 4, // index of a column in your data
        },
        captions: {
            from: 0, // index of a column in your data
            to: 1, // index of a column in your data
            text: 2, // index of a column in your data
            image: 3, // index of a column in your data
        }
    },
    data: {
        data: [
            [ "DataColumn1Value1", "DataColumn2Value1",
            [ "DataColumn1Value2", "DataColumn2Value2",
            [ "DataColumn1Value3", "DataColumn2Value3",
            ...
        ],
        captions: [
            [ "CaptionsColumn1Value1", "CaptionsColumn2Value1",
            [ "CaptionsColumn1Value2", "CaptionsColumn2Value2",
            [ "CaptionsColumn1Value3", "CaptionsColumn2Value3",
            ...
        ]
    }
}

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:

{
        data: [
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            ...
        ],
        captions: [
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            ...
        ]
    }

... 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/bar-chart-race",
    version: "14",
    bindings: {
        data: {
            label: "DataHeader1",
        },
        captions: {
            
        }
    },
    data: {
        data: [
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            ...
        ],
        captions: [
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            ...
        ]
    }
}

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

{
    template: "@flourish/bar-chart-race",
    version: "14",
    bindings: {
        data: {
            label: "DataHeader1",
            values: ["DataHeader2", "DataHeader3", ...],
            category: "DataHeader4",
            image: "DataHeader5",
        },
        captions: {
            from: "CaptionsHeader1",
            to: "CaptionsHeader2",
            text: "CaptionsHeader3",
            image: "CaptionsHeader4",
        }
    },
    data: {
        data: [
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            { "DataHeader1": ..., "DataHeader2": ..., ... },
            ...
        ],
        captions: [
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            { "CaptionsHeader1": ..., "CaptionsHeader2": ..., ... },
            ...
        ]
    }
}

(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/bar-chart-race",
    version: "14",
    data: {
    data: [
        {
            label: ...,
            values: [...]
        },
        ...
    ]
},
    ...
}

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

{
    template: "@flourish/bar-chart-race",
    version: "14",
    data: {
    data: [
        {
            label: ...,
            values: [...],
            category: ...,
            image: ...
        },
        ...
    ],
    captions: [
        {
            from: ...,
            to: ...,
            text: ...,
            image: ...
        },
        ...
    ]
},
    ...
}

Meanings of the template data keys:

• data.label: A column containing the names of the bars, e.g. countries or people
• data.values: Multiple columns of numbers, each column representing a point in time
• data.category: Optional category column to color the bars. Make sure the "Color mode" setting is set to "By Category" in the "Bar colors" settings panel
• data.image: Optional column with URLs of images
• captions.from: Must match the column headers in the main data sheet
• captions.to: Must match the column headers in the main data sheet
• captions.text: Text or HTML to show
• captions.image: Image to show

Template settings

Options for opts.state.

Setup

column_chart boolean

Chart style.

number_of_bars number

No. bars.

bar_margin number

Spacing (%).

sort_enabled boolean

Sorting.

sort_ascending boolean

Sort mode.

bars_advanced boolean

Show advanced.

height_mode string

Bar height.

bar_height number

Height. Height of the bar; expressed as multiple of page font size to make it device dependent

bar_min_value number

Hide bars below value. This will filter all bars that have a value below the number specified in this setting

bar_empty_spaces boolean

When not enough bars. If enabled, the chart and bars will remain the same size as more bars enter the race

Colors

color_mode string

Color mode. Whether to color by category (if you have a category column set in the data area), by each individual bar, or give every bar the same color

color_single color

Single color.

color.scale_type string

Scale type.

color.categorical_palette colors

Palette.

color.categorical_extend boolean

Extend. Automatically generate additional colours when needed to avoid the palette colours being used more than once.

color.categorical_custom_palette text

Color overrides. Type the name or category of the bar whose color you want to set, a colon and then a color (using a name, hex-code or rgb declaration). Multiple colors can be set using multiple lines. For example:

---

Africa: red
Asia: #4455AA
Europe: rgb(30,168,26)

---

color.numeric_type string

Scale type.

color.binning boolean

In linear mode, the color scale will run as a smooth gradient between 2 colors. In binned mode, the gradient will be divided in smaller blocks.

color.bin_mode string

Binning mode.

color.bin_count number

Number of bins.

color.bin_thresholds string

Custom thresholds. Write your custom thresholds, separated by a ";" For example 5;10;15

color.sequential_palette string

Palette.

color.sequential_reverse boolean

Reverse.

color.sequential_custom_min color

Minimum color.

color.sequential_custom_max color

Maximum color.

color.sequential_color_space string

Color space.

color.sequential_custom_domain boolean

Domain.

color.sequential_domain_min number

Min.

color.sequential_domain_max number

Max.

color.diverging_palette string

Palette.

color.diverging_reverse boolean

Reverse.

color.diverging_custom_min color

Minimum color.

color.diverging_custom_mid color

Midpoint color.

color.diverging_custom_max color

Maximum color.

color.diverging_color_space string

Color space.

color.diverging_custom_domain boolean

Domain.

color.diverging_domain_min number

Min.

color.diverging_domain_mid number

Mid.

color.diverging_domain_max number

Max.

color_single_overrides text

Color overrides. Type the label of the bar whose color you want to set, a colon and then a color (using a name, hex-code or rgb declaration). Multiple colors can be set using multiple lines. For example:

---

China: red
India: #4455AA
Brazil: rgb(30,168,26)

bar_opacity number

Bar opacity.

Labels

label_max_size number

Max size.

label_mode string

Labels mode.

label_color_in color

Color.

label_axis_width number

Space.

show_value boolean

Show values.

label_color_out color

Color.

padding_right number

Space.

Images

image_height number

Height. As a % of bar height

image_width number

Width. As a % of bar height

image_margin_right number

Margin right. As a % of bar height

image_scale string

Image sizing.

image_circle boolean

Shape.

Counter & totalizer

counter boolean

Show current time.

counter_font_size number

Size (% of screen).

counter_color color

Color.

counter_line_height number

Line height.

totaliser boolean

Show total. Shows the sum of all the values in the data sheet for the current time, including any bars not currently visible in the chart.

totaliser_font_size number

Size (% of screen).

totaliser_color color

Color.

totaliser_label string

Label.

Timed captions

caption_background_color color

Background.

caption_border_color color

Border.

caption_opacity number

Opacity.

caption_padding number

Padding. In rems – multiples of the base font size

caption_text_align string

Align.

caption_position string

Position.

caption_font_size number

Font size. In rems – multiples of the base font size

caption_text_color color

Text.

caption_mode string

Content mode. In “Text with colors” mode, any phrases matching category names will be automatically colored. In HTML mode no colors will be applied, but you can include any html in the data sheet to add images etc, etc.

caption_image_width number

Width. As a percentage of the caption container width

caption_image_position string

Position.

caption_space_between number

Space between. Space between image and text

Controls

sort_control boolean

Show sort control.

sort_descending_text string

“Highest” label.

sort_ascending_text string

“Lowest” label.

controls_style.font_size number

Text size.

controls_style.font_weight string

Text weight.

controls_style.padding number

Height. Space below and above controls text

button_style.background color

Background.

button_style.background_selected color

Selected.

button_style.background_hover color

Mouse over.

button_style.font_color color

Text color.

button_style.font_color_selected color

Selected.

button_style.font_color_hover color

Mouse over.

button_style.button_styles_advanced boolean

Button border styles.

button_style.border_width number

Border width.

button_style.border_color color

Color.

button_style.border_transparency number

Transparency.

button_style.border_radius number

Radius.

Legend

legend.show_legend boolean

legend.text_color color

Color.

legend.text_size number

Size.

legend.text_weight string

Weight.

legend.title_mode string

Title mode.

legend.title string

Title.

legend.title_weight string

Weight.

legend.swatch_width number

Width.

legend.swatch_height number

Height.

legend.swatch_radius number

Roundness. The radius of the corners of the swatch (in pixels)

legend.order_override text

Custom order override. Manually specify the order of legend entries (one entry per line)

legend.orientation string

Orientation.

text_legend string

text_legend_title boolean

Title.

text_legend_subtitle boolean

Subtitle.

text_legend_caption boolean

Captions.

text_legend_bold boolean

Bold. If checked, always use bold for colored items

Axis

axis_text_color color

Text color.

axis_font_size number

Text size.

axis_color color

Line color.

axis_gridline_dash number

Line dash.

scale_type string

Type. The dynamic scale type sets a dynamix x-axis that will animate with the chart. The fixed or custom scale type sets a fixed maximum value on the x-axis.

scale_min number

Min range. The axis will go from zero to this value, then be dynamic

scale_max number

Max.

Annotations

annotations_enabled boolean

annotations_content text

Annotations. One line per annotation.

Syntax
Annotation text :: Value on X axis

Example
Winner :: 250
Majority :: 200

annotations_text_color color

Text color.

annotations_text_size number

Size.

annotations_text_weight string

Weight.

annotations_line_color color

Line color.

annotations_line_opacity number

Opacity.

annotations_line_width number

Width.

annotations_line_dash number

Dash.

annotations_align string

Align.

annotations_offset string

Offset.

Timeline & animation

timeline.enabled boolean

timeline.style string

Style.

timeline.graph boolean

Show chart.

timeline.play_on_load boolean

Play on load.

timeline.loop boolean

Loop timeline. When turned on, the timeline will return to the beginning once complete. Otherwise, it will stop when it reaches the end.

timeline.duration number

Timeline duration. Total duration of the timeline during normal playback (in seconds).

timeline.duration_tween number

Time jump duration. Duration of transitions between different points in time on the timeline. This is the transition you see in the story player when switching between slides with a different time one the timeline (in seconds).

timeline.duration_wait_at_end number

Pause before loop.

timeline.axes_custom_enabled boolean

Axis settings.

timeline.color_axes color

Axes color.

timeline.axis_font_size number

Font size.

timeline.date_format_display string

X axis date format.

timeline.axis_nice_x boolean

Clean X axis. Rounds out the X axis so that its start and end values are nice, round numbers

timeline.axis_nice_y boolean

Clean Y axis. Rounds out the Y axis so that its start and end values are nice, round dates

timeline.scrubber_snap boolean

Snap when scrubbing. When turned on, you can only jump to values that are supplied in the dataset and nothing in between

timeline.scrubber_snap_paused boolean

Snap when paused. Enabling this will cause the timeline to snap to the nearest interval when not animating. This is useful for ensuring the data visible in the visualisation always reflects the data you have supplied.

timeline.layout_settings boolean

Layout settings.

timeline.margin.top number

Top.

timeline.margin.left number

Left.

timeline.margin.bottom number

Bottom.

timeline.margin.right number

Right.

timeline.playback_button.margin_right number

Space between button and timeline.

timeline.scrubber_height number

Scrubber height.

timeline.playback_button.margin_right_button number

Space between button and text.

timeline.graph_settings boolean

Chart settings.

timeline.color_background color

Background.

timeline.graph_height number

Height.

timeline.curve boolean

Curved lines.

timeline.playback_styling boolean

Play button settings.

timeline.playback_button.button_color color

Button color.

timeline.playback_button.button_size number

Button size.

timeline.playback_button.icon_color color

Icon color.

timeline.playback_button.icon_size number

Icon size.

timeline.playback_button.label_size number

Label size.

animation_duration number

Bar swap duration. Animation duration of the bars swapping, in seconds

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

blank_cells string

How to handle blank/invalid cells. “Interpolate” fills the gaps between the last and next valid values

value_format.prefix string

Prefix. Text to place in front of number

value_format.suffix string

Suffix. Text to place after number

value_format.n_dec number

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

value_format.advanced boolean

Advanced.

value_format.negative_sign string

Styling of negative numbers.

value_format.strip_zeros boolean

Remove trailing zeros.

value_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”.

value_format.transform_labels boolean

Multiply/divide values.

value_format.transform string

value_format.multiply_divide_constant number

value_format.exponentiate_constant number

Layout

layout.body_font font

Main font. This font will apply to the whole graphic by default, but you can optionally change the font for the title, subtitle, footer, etc in the Header and Footer settings panels.

layout.font_color color

Text color. This color will apply to the whole graphic by default, but you can optionally change the color for individual text elements, in other settings panels.

layout.background_color_enabled boolean

Color.

layout.background_image_enabled boolean

Image.

layout.background_color color

Background color.

layout.background_image_src url

Image URL.

layout.background_image_size string

Size.

layout.background_image_position string

Position.

layout.max_width_target string

Maximum width. Apply a maximum width to just the main graphic or everything (main graphic plus header, footer, etc)

layout.max_width number

Maximum width. Leave blank to stretch to container width

layout.max_width_align string

Align.

layout.layout_order string

Layout order.

layout.space_between_sections string

Space between sections.

layout.space_between_sections_custom number

Custom.

layout.margin_top number

Top.

layout.margin_right number

Right.

layout.margin_bottom number

Bottom.

layout.margin_left number

Left.

layout.border.enabled boolean

Show borders around visualisation.

layout.border.top.width number

Top.

layout.border.top.style string

Style.

layout.border.top.color color

Color.

layout.border.right.width number

Right.

layout.border.right.style string

Style.

layout.border.right.color color

Color.

layout.border.bottom.width number

Bottom.

layout.border.bottom.style string

Style.

layout.border.bottom.color color

Color.

layout.border.left.width number

Left.

layout.border.left.style string

Style.

layout.border.left.color color

Color.

Header

layout.header_align string

Alignment.

layout.title string

layout.title_styling boolean

Change title styles.

layout.title_font font

Title Font.

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.title_space_above string

Space above.

layout.title_space_above_custom number

Custom.

layout.subtitle string

layout.subtitle_styling boolean

Change subtitle styles.

layout.subtitle_font font

Subtitle Font.

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.header_text string

layout.header_text_styling boolean

Styling.

layout.header_text_size string

Size.

layout.header_text_size_custom number

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

layout.header_text_weight string

Weight.

layout.header_text_color color

Color.

layout.header_text_line_height number

Line height.

layout.header_text_space_above string

Space above.

layout.header_text_space_above_custom number

Custom.

layout.header_border string

layout.header_border_width number

Width.

layout.header_border_color color

Color.

layout.header_border_style string

Style.

layout.header_border_space number

Space. Space between border and header text

layout.header_logo_enabled boolean

layout.header_logo_src url

URL.

layout.header_logo_height number

Height.

layout.header_logo_align string

Align. Align logo inside header or outer visualisation container

layout.header_logo_position_inside string

Position.

layout.header_logo_position_outside string

Position.

layout.header_logo_margin_top number

Top.

layout.header_logo_margin_right number

Right.

layout.header_logo_margin_bottom number

Bottom.

layout.header_logo_margin_left number

Left.

Footer

layout.footer_align string

Alignment.

layout.footer_text_size number

Size.

layout.footer_text_color color

Color.

layout.footer_styling boolean

Advanced footer styles.

layout.footer_font font

Font.

layout.footer_text_weight string

Weight.

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.footer_note string

Note.

layout.footer_note_secondary string

Note (secondary). The secondary note is placed below the source and primary note

layout.footer_logo_enabled boolean

Image.

layout.footer_logo_src url

Image.

layout.footer_logo_src_light hidden

Image (light version). If provided this version will be used whenever the background colour is dark

layout.footer_logo_link_url string

Link.

layout.footer_logo_height number

Height.

layout.footer_logo_margin number

Margin.

layout.footer_logo_order string

Position.

layout.footer_align_vertical string

V. align.

layout.footer_border string

layout.footer_border_width number

Width.

layout.footer_border_color color

Color.

layout.footer_border_style string

Style.

layout.footer_border_space number

Space. Space between border and footer text

Accessibility

layout.screenreader_hide_primary boolean

Screenreader mode for main visual container. Whether the main visual container is visible to screenreaders. (Text in the header and footer are always available to screenreaders.)

layout.screenreader_text_primary text

Screenreader description. A text alternative to the visual content that will only be visible to screenreaders, e.g. “The line chart shows China consistently higher than the other countries since 1990”. Do no replicate your title, since that will also be read by screenreaders.