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: {
        values_now: [
            [ "Values_nowColumn1Value1", "Values_nowColumn2Value1",
            [ "Values_nowColumn1Value2", "Values_nowColumn2Value2",
            [ "Values_nowColumn1Value3", "Values_nowColumn2Value3",
            ...
        ],
        values_historical: [
            [ "Values_historicalColumn1Value1", "Values_historicalColumn2Value1",
            [ "Values_historicalColumn1Value2", "Values_historicalColumn2Value2",
            [ "Values_historicalColumn1Value3", "Values_historicalColumn2Value3",
            ...
        ]
    }
}

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/election-results-chart",
    version: "7",
    bindings: {
        values_now: {
            name: 0, // index of a column in your data
        },
        values_historical: {
            
        }
    },
    data: {
        values_now: [
            [ "Values_nowColumn1Value1", "Values_nowColumn2Value1",
            [ "Values_nowColumn1Value2", "Values_nowColumn2Value2",
            [ "Values_nowColumn1Value3", "Values_nowColumn2Value3",
            ...
        ],
        values_historical: [
            [ "Values_historicalColumn1Value1", "Values_historicalColumn2Value1",
            [ "Values_historicalColumn1Value2", "Values_historicalColumn2Value2",
            [ "Values_historicalColumn1Value3", "Values_historicalColumn2Value3",
            ...
        ]
    }
}

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

{
    template: "@flourish/election-results-chart",
    version: "7",
    bindings: {
        values_now: {
            name: 0, // index of a column in your data
            values: [1, 2, ...], // index(es) of column(s) in your data
        },
        values_historical: {
            name: 0, // index of a column in your data
            values: [1, 2, ...], // index(es) of column(s) in your data
        }
    },
    data: {
        values_now: [
            [ "Values_nowColumn1Value1", "Values_nowColumn2Value1",
            [ "Values_nowColumn1Value2", "Values_nowColumn2Value2",
            [ "Values_nowColumn1Value3", "Values_nowColumn2Value3",
            ...
        ],
        values_historical: [
            [ "Values_historicalColumn1Value1", "Values_historicalColumn2Value1",
            [ "Values_historicalColumn1Value2", "Values_historicalColumn2Value2",
            [ "Values_historicalColumn1Value3", "Values_historicalColumn2Value3",
            ...
        ]
    }
}

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:

{
        values_now: [
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            ...
        ],
        values_historical: [
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            ...
        ]
    }

... 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/election-results-chart",
    version: "7",
    bindings: {
        values_now: {
            name: "Values_nowHeader1",
        },
        values_historical: {
            
        }
    },
    data: {
        values_now: [
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            ...
        ],
        values_historical: [
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            ...
        ]
    }
}

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

{
    template: "@flourish/election-results-chart",
    version: "7",
    bindings: {
        values_now: {
            name: "Values_nowHeader1",
            values: ["Values_nowHeader2", "Values_nowHeader3", ...],
        },
        values_historical: {
            name: "Values_historicalHeader1",
            values: ["Values_historicalHeader2", "Values_historicalHeader3", ...],
        }
    },
    data: {
        values_now: [
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            { "Values_nowHeader1": ..., "Values_nowHeader2": ..., ... },
            ...
        ],
        values_historical: [
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            { "Values_historicalHeader1": ..., "Values_historicalHeader2": ..., ... },
            ...
        ]
    }
}

(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/election-results-chart",
    version: "7",
    data: {
    values_now: [
        {
            name: ...,
            values: [...]
        },
        ...
    ],
    values_historical: [
        {
            values: [...]
        },
        ...
    ]
},
    ...
}

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

{
    template: "@flourish/election-results-chart",
    version: "7",
    data: {
    values_now: [
        {
            name: ...,
            values: [...]
        },
        ...
    ],
    values_historical: [
        {
            name: ...,
            values: [...]
        },
        ...
    ]
},
    ...
}

Meanings of the template data keys:

• values_now.name: The name of the data series (eg. voting district, data mode)
• values_now.values: One column per party, with party names as header rows.
• values_historical.name: The name of the data series (eg. voting district, data mode)
• values_historical.values: One column per party, with party names as header rows.

Template settings

Options for opts.state.

Chart styles

color.scale_type string

Scale type.

color.categorical_type string

color.categorical_palette colors

Palette.

color.categorical_extend boolean

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

color.categorical_seed_color color

Seed color. Initial color in generated sequence (avoid shades of grey).

color.categorical_rotation_angle number

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

color.categorical_color_space string

color.categorical_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)

color.sequential_palette string

Palette.

color.sequential_custom_min color

Minimum color.

color.sequential_custom_max color

Maximum color.

color.sequential_color_space string

color.sequential_reverse boolean

Reverse scale.

color.diverging_palette string

Palette.

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.diverging_reverse boolean

Reverse scale.

chart_height number

Chart height.

chart_background color

Chart background. Background color of part of chart that's not filled with data (ie. when filtering parties)

use_custom_scale boolean

Scale type. On default, will use the sum of all data points as the max value. Enable this setting to use a custom value

custom_scale_max number

Max value for scale. This will set the maximum value of the scale. Eg. the total amount of seats to be won in an election

Threshold line

middle_line_position number

Position.

middle_line_content string

Text.

middle_line_text_color color

Colour.

middle_line_dashoffset string

Dash width and offset. eg. 2,2

middle_line_width number

Thickness.

middle_line_color color

Colour.

Chart labels

hide_partyname boolean

label_font_size number

Text size.

label_font_color color

Text colour.

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.advanced boolean

Advanced.

label_format.negative_sign string

Styling of negative numbers.

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

label_suffix string

Historical label suffix. Suffix used to compare current and historical results. For example, "%" when data measures vote shares, or "seats" when data measures seats won.

Dropdown and legend

hide_dropdown boolean

hide_empty_rows boolean

Hide empty rows in dropdown.

current_id string

Default value of dropdown.

dropdown_label_color color

Text color.

legend.show_legend boolean

legend.text_color color

Color.

legend.text_size number

Size.

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.

legend_position string

Position.

hide_empty_legend_items boolean

Hide zero-valued entries.

Text and translation

dropdown_label string

Text left of dropdown.

instruction_label string

Instruction text above legend.

placeholder_text string

No data placeholder text. Placeholder text if there is no data

subtitle_text string

Text below results.

Popups

popup.show_popups boolean

Popups.

popup.is_custom boolean

Popup contents.

popup.custom_template text

Popup content. The text to appear in the popup. You can use {{column_name}} to add a value from your data. It must be in a selected column, but you can add columns to “Metadata” if you just want to include them for use in the popup. Advanced users can include HTML to apply layouts, formatting, images, etc.

popup.show_pointer boolean

Pointer.

popup.show_shadow boolean

Shadow.

popup.style_popups boolean

Custom styling.

popup.text_color color

Text colour.

popup.align string

Alignment.

popup.font_size number

Font size.

popup.fill_color color

Fill colour.

popup.opacity number

Fill opacity.

popup.padding number

Padding.

popup.border_radius number

Radius. Corner radius of popup

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

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.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