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: "8",
    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: "8",
    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: "8",
    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: "8",
    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: "8",
    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: "8",
    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

bar_height number

Height.

bar_background color

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

show_party_name boolean

Show party name.

label_font_size number

Text size.

label_font_color color

Text colour.

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.

Colors

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

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:<br /><hr />Party 1: red<br />Party 2: #4455AA<br />Party 3: 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". Bins are created between the domain minimum and the first threshold, between each threshold and between the final threshold and the domain maximum. Therefore for the example "5;10;15" four bins are created. (The domain is the minimum and maximum values of your data.)

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.

Controls

filter_control.control_type string

Control type. Choose between a dropdown, buttons or a time slider.

filter_control.control_styles boolean

Adv..

filter_control.control_title string

Control title.

filter_control.button_group boolean

Grouped.

filter_control.button_group_width_mode string

Button group width.

filter_control.button_group_width_fixed number

Width.

filter_control.dropdown_width_mode string

Dropdown width.

filter_control.dropdown_width_fixed number

Width.

filter_control.slider_width number

Slider width. Width of the slider track. In rems, multiples of base font size.

filter_control.slider_max_label_width number

Max label width. In rems, multiples of base font size. If larger than the longest label, only the space required to fit labels will be used.

filter_control.slider_step_time number

Time between steps. Measured in seconds, positive values move the slider left to right, negative values move the slider right to left.

filter_control.slider_loop boolean

Loop.

filter_control.slider_restart_pause number

Pause before loop. Measured in seconds and in addition to the regular step time displayed above.

filter_control.sort boolean

Sorting.

controls_container.alignment string

Alignment.

controls_container.controls_spacing number

Spacing. Spacing between individual controls elements (in em) e.g. between a dropdown and an adjcadent set on buttons

controls_style.font_size number

Text size.

controls_style.font_weight string

Text weight.

controls_style.height number

Height.

dropdown_style.background color

Background.

dropdown_style.font_color color

Text color.

dropdown_style.border_styles_advanced boolean

Dropdown border styles.

dropdown_style.border_style string

Border style. Show border on all sides, or only at the bottom

dropdown_style.border_width number

Border width.

dropdown_style.border_color color

Color.

dropdown_style.border_transparency number

Transparency.

dropdown_style.border_radius number

Radius.

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.

slider_style.track_color color

Track.

slider_style.font_color color

Text.

slider_style.handle_color color

Handle.

slider_style.play_color color

Play/pause.

slider_style.track_height number

Track height.

slider_style.handle_height number

Height.

slider_style.play_button boolean

Play button.

Legend

legend_categorical.show_legend boolean

legend_categorical.title_mode string

Title mode.

legend_categorical.title string

Title.

legend_categorical.swatch_width number

Width.

legend_categorical.swatch_height number

Height.

legend_categorical.swatch_radius number

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

legend_categorical.legend_items_padding number

Padding. Padding between legend items (in rems)

legend_categorical.order_override text

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

legend_categorical.icon_height number

Height. Height of icon (relative to the base font size)

legend_categorical.icon_color color

Color. Fallback color (icon color if not determined by template)

legend_categorical.max_width number

Max width.

legend_categorical.orientation string

Orientation.

legend_container.alignment string

Alignment.

legend_container.orientation string

Orientation.

legend_container.title_weight string

Title weight.

legend_container.text_weight string

Text weight.

legend_container.text_color color

Color.

legend_container.text_size number

Size.

legend_position string

Position.

hide_empty_legend_items boolean

Hide zero-valued entries.

Text and translation

placeholder_text string

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

subtitle_text string

Text below results.

value_change_abbreviation string

Value change abbreviation. A suffix used to describe the percentage point change since the previous election

Popups & panels

popup.mode string

popup.popup_is_custom boolean

Popup content.

popup.show_popup_styles boolean

Show popup styles.

popup.popup_custom_header html

Popup custom header. 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. You can also hide content based on a column name being empty using {{# if column_name}}Text to display when column_name is not empty{{/if}}. For example: {{Country}} {{#if Capital}}(Capital: {{Capital}}){{/if}}

popup.popup_custom_main html

Popup custom main 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. You can also hide content based on a column name being empty using {{# if column_name}}Text to display when column_name is not empty{{/if}}. For example: {{Country}} {{#if Capital}}(Capital: {{Capital}}){{/if}}

popup.popup_width number

Max width. In rems, multiples of base font size. Leave blank to let the width adjust based on the contents.

popup.popup_font_size number

Text size.

popup.popup_text_color color

Text color.

popup.popup_align string

Align.

popup.popup_background color

Fill color.

popup.popup_background_opacity number

Fill opacity.

popup.popup_padding number

Padding.

popup.popup_radius number

Radius. Corner radius of popup

popup.popup_header_type string

Header style.

popup.popup_header_background color

Background.

popup.popup_header_text_color color

Text.

popup.popup_list_type string

List type.

popup.popup_list_label_weight string

Label weight.

popup.popup_list_separator string

List separator.

popup.popup_shadow boolean

Shadow.

popup.popup_pointer boolean

Pointer.

popup.panel_position string

popup.panel_open_duration number

Open duration.

popup.panel_side_fixed boolean

Always show.

popup.panel_side_default_content text

Placeholder content.

popup.panel_is_custom boolean

Panel content.

popup.show_panel_styles boolean

Show panel styles.

popup.panel_custom_header html

Panel custom header. The text to appear in the panel. 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. You can also hide content based on a column name being empty using {{# if column_name}}Text to display when column_name is not empty{{/if}}. For example: {{Country}} {{#if Capital}}(Capital: {{Capital}}){{/if}}

popup.panel_custom_main html

Panel custom main content. The text to appear in the panel. 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. You can also hide content based on a column name being empty using {{# if column_name}}Text to display when column_name is not empty{{/if}}. For example: {{Country}} {{#if Capital}}(Capital: {{Capital}}){{/if}}

popup.panel_width_overlay number

Width (%).

popup.panel_height_overlay number

Height (%).

popup.panel_width_side number

Width (%).

popup.panel_height_side number

Height (%).

popup.panel_max_width number

Max width (px).

popup.panel_max_height number

Max height (px).

popup.panel_vertical_position string

Vertical position. Choosing "Click position" is especially useful when your visualisation is really tall, this will make sure the panel content is always on top of the element you've clicked on

popup.panel_text_color color

Text color.

popup.panel_font_size number

Text size.

popup.panel_align string

Alignment.

popup.panel_background color

Fill color.

popup.panel_background_opacity number

Fill opacity.

popup.panel_padding number

Padding.

popup.panel_radius number

Radius. Corner radius of panel

popup.panel_list_type string

List type.

popup.panel_list_label_weight string

Label weight.

popup.panel_list_separator string

List separator.

popup.panel_shadow boolean

Shadow.

Number formatting

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.

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.

layout.read_direction string

Read direction. This will change the reading direction of the main text elements on the page. Its not possible to adjust this on all elements such as axes. Note that when direction is set to "right to left" any alignment icons will be reversed.

Header

layout.header_align string

Alignment.

layout.title html

layout.title_styling boolean

Styling.

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 html

layout.subtitle_styling boolean

Styling.

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 html

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

Image.

layout.header_logo_alt string

Alt text.

layout.header_logo_link_url string

Link.

layout.header_logo_height number

Height.

layout.header_logo_align string

Align. Align logo inside either the header or the main 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_alt string

Alt text.

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 not replicate your title, since that will also be read by screenreaders.

layout.screenreader_label string

Screenreader label. A short text label given to the main Flourish embed wrapper to provide an accessible name that is only visible to screenreaders. Added in the form of an "aria-label".

URL settings

url_state.enabled boolean

Update project from URL. Make it possible to change the visualization's settings/state from the URL hash, for example when embedding in an iframe or popup panel

url_state.whitelist text

Allowed state properties. List each state property you want to make changeable with the URL hash. See the template page for a full list of state properties. Add one property name per line. Use dot format for nested properties, e.g. `layout.background_color`