Range chart

ObservationLeft and Right inspect. Escape clears.

Usage

Import the component and the stylesheet once. See Getting started to install the package.

import { RangeChartCard } from '@lilt-ui/charts';
import '@lilt-ui/charts/styles.css';

<RangeChartCard
  title="Temperature by month"
  data={temperature}
  x="month"
  low="low"
  high="high"
  value="mean"
/>

Omit title to leave out the visible title. Set header={false} to remove the whole header, and use aria-label to name a chart inside your own card. legend={false} removes the legend independently. surface="ghost" controls only the visual frame. See Card composition.

Data

Each range needs low at or below high; error bars also need the value between them. The headline averages the values by default (aggregate="mean"), because ranges rarely add up. Without value, the high of each range drives the headline and pills. The same marks are available as RangeBar and ErrorBar primitives, reading any series’ fields.

// One row per x with the low and high of its range, and optionally a value inside it.
const temperature = [
  { month: 'Jan', low: 2, high: 9, mean: 5.5 },
  { month: 'Feb', low: 3, high: 11, mean: 7 },
];

Timeline intervals

TimelineChartCard draws elapsed time horizontally. Dates, ISO strings, and epoch milliseconds are accepted. Missing endpoints stay unplotted and are counted; reversed intervals are rejected. Overlaps stack without hiding observations. Duration values and summaries are milliseconds, formatted as hours by default; simultaneous intervals add independently.

import { TimelineChartCard } from '@lilt-ui/charts';

<TimelineChartCard data={deployments} id="id" label="task" start="start" end="end" lane="service" group="state" />

Prop	Type	Description
`title`	`string`	Optional visible title. Omit to render no title. Also supplies the accessible name unless aria-label is set.
`header`	`boolean`	Defaults to true. False removes the whole header: title, headline, delta and period controls, with no reserved space. Pass data directly when your app owns period selection.
`aria-label`	`string`	Accessible chart name, independent of the visible title. Falls back to title, then a generic chart name.
`data`	`Row[]`	One row per observation. Omit when using ranges.
`height`	`number`	Minimum plot height, default 260. Dense lanes expand to keep every mark visible.
`depth`	`boolean`	Lit tiles, solid bars, or spheres. Data positions remain exact; loading keeps the same depth treatment.
`color`	`string`	Override the palette with one CSS color.
`aggregate`	`'sum' \| 'mean' \| 'max'`	Resting headline summary; Strip defaults to mean, the others to sum.
`headline`	`number`	Override the resting headline.
`delta`	`number`	Fractional change shown alongside the headline.
`deltaTone`	`'default' \| 'inverse' \| 'neutral'`	Use inverse when a decrease is good.
`range`	`string`	Static period label.
`ranges`	`{ id, label, data, headline?, delta? }[]`	Period choices with their own data.
`defaultRange`	`string`	Initial period id.
`locale`	`string`	Locale for numbers and dates; defaults to en-US.
`formatValue`	`(value: number) => string`	Custom value formatter.
`badge`	`ReactNode`	Content for the glass tab above the card.
`className`	`string`	Class on the card frame.
`style`	`CSSProperties \| ChartStyle`	Inline styles and scoped chart variables.
`onSelectionChange`	`(selection \| null) => void`	Reports id, original row (or null for an absent day), value, and pinned state.
`renderReadout`	`(selection \| null) => ReactNode`	Consumer-owned readout, including when the header is hidden.
`valueFormat`	`Intl.NumberFormatOptions`	Formats the headline, tiles, and axis, e.g. currency.
`surface`	`'elevated' \| 'outline' \| 'ghost'`	Card treatment. Ghost removes the visual frame only; header and legend are independent controls.
`palette`	`'iris' \| 'cobalt' \| 'emerald'`	Series colors. Iris by default; explicit series colors still win.
`numberStyle`	`'count' \| 'pop' \| 'slide' \| 'roll' \| 'flow' \| 'scramble'`	How the headline animates when its value changes. Count (default) counts to the new value.
`loading`	`boolean`	Shows a neutral loading skeleton, not data.
`loadingStyle`	`'shimmer' \| 'draw' \| 'breathe'`	Shimmer sweeps a highlight over still shapes; draw reveals them in order; breathe lets them settle. Follows the selected look, including depth, and respects reduced motion.
`empty`	`'dots' \| 'shape' \| ReactElement \| null`	What the card shows when the period has no data. Dots (default) gathers a quiet dot field around the message; shape lays the chart’s own outline behind it. Pass `<ChartEmpty>` with your own words, any element of your own, or null for nothing. Both looks stay still, so empty never reads as loading, and the headline reads a dash, never zero.
`motion`	`'auto' \| 'none'`	None turns off decorative motion; reduced motion does this automatically.
`label`	`text key of Row`	Names each interval; must be unique unless id is supplied.
`id`	`text key of Row`	Stable unique interval identity.
`start`	`date, string, or numeric key of Row`	UTC endpoints. Equal endpoints render a small instant marker.
`end`	`date, string, or numeric key of Row`	UTC endpoints. Equal endpoints render a small instant marker.
`lane`	`text key of Row`	Groups intervals into labeled lanes; overlaps get separate subrows.
`group`	`text key of Row`	Colors intervals by a category and creates its duration legend.
`formatTime`	`(timestamp: number) => string`	Formats axis ticks and endpoint readouts.
`legend`	`false \| 'tiles' \| 'inline' \| 'list' \| 'pills' \| 'bars'`	Duration legend layout; tiles by default.
`legendSwatch`	`'square' \| 'dot' \| 'line'`	Legend marker; square by default.
`onKeyDown`	`KeyboardEventHandler<HTMLElement>`	Keyboard handler on the card frame. Chart inspection also has its own keyboard handling.

Props

Every prop RangeChartCard accepts, in the order you are likely to reach for them.

Prop	Type	Description
`title`	`string`	Optional visible title. Omit to render no title. Also supplies the accessible name unless aria-label is set.
`data`	`Row[]`	One row per x position. Omit when using ranges.
`x`	`key of Row`	Text, number, or Date field for the x axis.
`low`	`key of Row`	Numeric field holding each range’s low.
`high`	`key of Row`	Numeric field holding each range’s high.
`value`	`key of Row`	Numeric field holding the measured value. Defaults to high.
`label`	`string`	Names the series in hover.
`color`	`string`	Any CSS color.
`display`	`'bar' \| 'error'`	Floating bars (default), or whiskers around a dot at the value.
`depth`	`boolean`	Draws each bar as a solid block whose front spans exactly low to high. Error bars stay flat.
`header`	`boolean`	Defaults to true. False removes the whole header: title, headline, delta and period controls, with no reserved space. Pass data directly when your app owns period selection.
`aria-label`	`string`	Accessible chart name, independent of the visible title. Falls back to title, then a generic chart name.
`delta`	`number`	Fractional change for the chip: 0.082 shows +8.2%.
`deltaTone`	`'default' \| 'inverse' \| 'neutral'`	Use inverse when a decrease is good.
`headline`	`number`	Resting headline. Defaults to the aggregate of non-reference series; dashed series are excluded.
`range`	`string`	Static period label in the header.
`ranges`	`{ id, label, data, delta?, headline? }[]`	Turns the period label into a select. Each range swaps the data.
`valueFormat`	`Intl.NumberFormatOptions`	Formats the headline, tiles, and axis, e.g. currency.
`legend`	`false \| 'tiles' \| 'inline' \| 'list' \| 'pills' \| 'bars'`	False removes the legend without changing the data. How the legend under the plot lays out: value tiles (default), a compact inline key, list rows, tinted pills, or bars that also draw each value against the largest.
`legendSwatch`	`'square' \| 'dot' \| 'line'`	The mark beside each legend label. Defaults to a rounded square.
`height`	`number`	Plot height in pixels. Defaults to 240.
`axis`	`'minimal' \| 'dots' \| 'inline' \| 'ruler' \| 'classic' \| 'segmented' \| { x, y }`	Axis preset. Minimal (default) labels only the x ends and has no grid. Set one per axis with `{ x, y }`; a segmented axis can take a `gradient` to read as a range.
`hover`	`'pills' \| 'tooltip' \| 'strip' \| 'headline'`	The one readout for the hovered point: pills on the axes (default), a tooltip with every series, a strip docked above the plot, or the headline and tiles alone.
`hoverStyle`	`'soft' \| 'solid' \| 'accent'`	How the pills or tooltip look. Soft (default) is surface glass; accent tints it with the hovered series.
`pillPosition`	`'auto' \| 'mark' \| 'axis'`	Where the value pill sits: above the hovered mark, or on the y axis. Auto picks mark when there are no y labels.
`tooltipIndicator`	`'square' \| 'dot' \| 'line'`	Series marker on each tooltip row, with hover="tooltip". Square by default.
`background`	`'dots' \| 'grid' \| 'lines' \| 'none'`	Texture behind the marks. Dots by default, with a hover spotlight.
`surface`	`'elevated' \| 'outline' \| 'ghost'`	Card treatment. Ghost removes the visual frame only; header and legend are independent controls.
`palette`	`'iris' \| 'cobalt' \| 'emerald'`	Series colors. Iris by default; explicit series colors still win.
`axisInset`	`number`	Padding between the plot edges and axis labels or pills.
`loading`	`boolean`	Shows a neutral loading skeleton, not data.
`loadingStyle`	`'shimmer' \| 'draw' \| 'breathe'`	Shimmer sweeps a highlight over still shapes; draw reveals them in order; breathe lets them settle. Follows the selected look, including depth, and respects reduced motion.
`empty`	`'dots' \| 'shape' \| ReactElement \| null`	What the card shows when the period has no data. Dots (default) gathers a quiet dot field around the message; shape lays the chart’s own outline behind it. Pass `<ChartEmpty>` with your own words, any element of your own, or null for nothing. Both looks stay still, so empty never reads as loading, and the headline reads a dash, never zero.
`compare`	`boolean \| 'headline' \| 'badge'`	Drag across the plot to compare two points in time. True or headline reads the change in the headline; badge reads it in the card’s tab and leaves the headline at rest.
`sync`	`string`	Link hover and pins with every card that uses the same name, matched by x value. A click pins them all, with a ghost pin on the others; Alt-click pins one card only.
`numberStyle`	`'count' \| 'pop' \| 'slide' \| 'roll' \| 'flow' \| 'scramble'`	How the headline animates when its value changes. Count (default) counts to the new value.
`motion`	`'auto' \| 'none'`	None turns off decorative motion; reduced motion does this automatically.
`aggregate`	`'sum' \| 'mean' \| 'last' \| 'max'`	Summary at rest: sum for counts, mean for rates, last for levels, or max for peaks. Area defaults to sum; Range defaults to mean.
`defaultRange`	`string`	Initial range id; defaults to the first supplied range.
`locale`	`string`	Locale used for number formatting. Defaults to en-US.
`formatValue`	`(value: number) => string`	Custom value text, taking precedence over valueFormat.
`formatAxisValue`	`(value: number) => string`	Custom compact axis value text.
`formatX`	`(value: string \| number \| Date) => string`	Custom x label text.
`xType`	`'category' \| 'number' \| 'time'`	Override inferred x type. Use time for numeric Unix timestamps in milliseconds.
`spotlight`	`boolean`	Highlight the inspected position in the plot background. Defaults to true.
`badge`	`ReactNode`	Content in the tab above the card. A comparison badge can replace this while a comparison is active.
`className`	`string`	Additional class on the card frame.
`style`	`CSSProperties \| ChartStyle`	Inline styles and scoped --lilt-* chart variables.
`pillValue`	`'series' \| 'stack'`	Read an individual series value (default) or its stacked height. Has no effect when the card has no stacked series.
`decimate`	`boolean`	Defaults to true. Line and Area marks retain at most four observations per pixel column. Other marks draw every row; inspection and summaries always read the full data.
`tiles`	`boolean`	Show the range series value tile beneath the plot. Defaults to false.

Data

// One row per x with the low and high of its range, and optionally a value inside it. const temperature = [ { month: 'Jan', low: 2, high: 9, mean: 5.5 }, { month: 'Feb', low: 3, high: 11, mean: 7 }, ];

Timeline intervals

Prop

Type

Description

title

string

Optional visible title. Omit to render no title. Also supplies the accessible name unless aria-label is set.

header

boolean

Defaults to true. False removes the whole header: title, headline, delta and period controls, with no reserved space. Pass data directly when your app owns period selection.

aria-label

string

Accessible chart name, independent of the visible title. Falls back to title, then a generic chart name.

data

Row[]

One row per observation. Omit when using ranges.

height

number

Minimum plot height, default 260. Dense lanes expand to keep every mark visible.

depth

boolean

Lit tiles, solid bars, or spheres. Data positions remain exact; loading keeps the same depth treatment.

color

string

Override the palette with one CSS color.

aggregate

'sum' | 'mean' | 'max'

Resting headline summary; Strip defaults to mean, the others to sum.

headline

number

Override the resting headline.

delta

number

Fractional change shown alongside the headline.

deltaTone

'default' | 'inverse' | 'neutral'

Use inverse when a decrease is good.

range

string

Static period label.

ranges

{ id, label, data, headline?, delta? }[]

Period choices with their own data.

defaultRange

string

Initial period id.

locale

string

Locale for numbers and dates; defaults to en-US.

formatValue

(value: number) => string

Custom value formatter.

badge

ReactNode

Content for the glass tab above the card.

className

string

Class on the card frame.

style

CSSProperties | ChartStyle

Inline styles and scoped chart variables.

onSelectionChange

(selection | null) => void

Reports id, original row (or null for an absent day), value, and pinned state.

renderReadout

(selection | null) => ReactNode

Consumer-owned readout, including when the header is hidden.

valueFormat

Intl.NumberFormatOptions

Formats the headline, tiles, and axis, e.g. currency.

surface

'elevated' | 'outline' | 'ghost'

Card treatment. Ghost removes the visual frame only; header and legend are independent controls.

palette

'iris' | 'cobalt' | 'emerald'

Series colors. Iris by default; explicit series colors still win.

numberStyle

How the headline animates when its value changes. Count (default) counts to the new value.

loading

boolean

Shows a neutral loading skeleton, not data.

loadingStyle

'shimmer' | 'draw' | 'breathe'

Shimmer sweeps a highlight over still shapes; draw reveals them in order; breathe lets them settle. Follows the selected look, including depth, and respects reduced motion.

empty

'dots' | 'shape' | ReactElement | null

What the card shows when the period has no data. Dots (default) gathers a quiet dot field around the message; shape lays the chart’s own outline behind it. Pass `<ChartEmpty>` with your own words, any element of your own, or null for nothing. Both looks stay still, so empty never reads as loading, and the headline reads a dash, never zero.

motion

'auto' | 'none'

None turns off decorative motion; reduced motion does this automatically.

label

text key of Row

Names each interval; must be unique unless id is supplied.

id

text key of Row

Stable unique interval identity.

start

date, string, or numeric key of Row

UTC endpoints. Equal endpoints render a small instant marker.

end

date, string, or numeric key of Row

UTC endpoints. Equal endpoints render a small instant marker.

lane

text key of Row

Groups intervals into labeled lanes; overlaps get separate subrows.

group

text key of Row

Colors intervals by a category and creates its duration legend.

formatTime

(timestamp: number) => string

Formats axis ticks and endpoint readouts.

legend

Duration legend layout; tiles by default.

legendSwatch

'square' | 'dot' | 'line'

Legend marker; square by default.

onKeyDown

KeyboardEventHandler<HTMLElement>

Keyboard handler on the card frame. Chart inspection also has its own keyboard handling.

Prop

Type

Description

title

string

Optional visible title. Omit to render no title. Also supplies the accessible name unless aria-label is set.

data

Row[]

One row per x position. Omit when using ranges.

x

key of Row

Text, number, or Date field for the x axis.

low

key of Row

Numeric field holding each range’s low.

high

key of Row

Numeric field holding each range’s high.

value

key of Row

Numeric field holding the measured value. Defaults to high.

label

string

Names the series in hover.

color

string

Any CSS color.

display

'bar' | 'error'

Floating bars (default), or whiskers around a dot at the value.

depth

boolean

Draws each bar as a solid block whose front spans exactly low to high. Error bars stay flat.

header

boolean

Defaults to true. False removes the whole header: title, headline, delta and period controls, with no reserved space. Pass data directly when your app owns period selection.

aria-label

string

Accessible chart name, independent of the visible title. Falls back to title, then a generic chart name.

delta

number

Fractional change for the chip: 0.082 shows +8.2%.

deltaTone

'default' | 'inverse' | 'neutral'

Use inverse when a decrease is good.

headline

number

Resting headline. Defaults to the aggregate of non-reference series; dashed series are excluded.

range

string

Static period label in the header.

ranges

{ id, label, data, delta?, headline? }[]

Turns the period label into a select. Each range swaps the data.

valueFormat

Intl.NumberFormatOptions

Formats the headline, tiles, and axis, e.g. currency.

legend

False removes the legend without changing the data. How the legend under the plot lays out: value tiles (default), a compact inline key, list rows, tinted pills, or bars that also draw each value against the largest.

legendSwatch

'square' | 'dot' | 'line'

The mark beside each legend label. Defaults to a rounded square.

height

number

Plot height in pixels. Defaults to 240.

axis

'minimal' | 'dots' | 'inline' | 'ruler' | 'classic' | 'segmented' | { x, y }

Axis preset. Minimal (default) labels only the x ends and has no grid. Set one per axis with `{ x, y }`; a segmented axis can take a `gradient` to read as a range.

hover

'pills' | 'tooltip' | 'strip' | 'headline'

The one readout for the hovered point: pills on the axes (default), a tooltip with every series, a strip docked above the plot, or the headline and tiles alone.

hoverStyle

'soft' | 'solid' | 'accent'

How the pills or tooltip look. Soft (default) is surface glass; accent tints it with the hovered series.

pillPosition

'auto' | 'mark' | 'axis'

Where the value pill sits: above the hovered mark, or on the y axis. Auto picks mark when there are no y labels.

tooltipIndicator

'square' | 'dot' | 'line'

Series marker on each tooltip row, with hover="tooltip". Square by default.

background

'dots' | 'grid' | 'lines' | 'none'

Texture behind the marks. Dots by default, with a hover spotlight.

surface

'elevated' | 'outline' | 'ghost'

Card treatment. Ghost removes the visual frame only; header and legend are independent controls.

palette

'iris' | 'cobalt' | 'emerald'

Series colors. Iris by default; explicit series colors still win.

axisInset

number

Padding between the plot edges and axis labels or pills.

loading

boolean

Shows a neutral loading skeleton, not data.

loadingStyle

'shimmer' | 'draw' | 'breathe'

Shimmer sweeps a highlight over still shapes; draw reveals them in order; breathe lets them settle. Follows the selected look, including depth, and respects reduced motion.

empty

'dots' | 'shape' | ReactElement | null

compare

boolean | 'headline' | 'badge'

Drag across the plot to compare two points in time. True or headline reads the change in the headline; badge reads it in the card’s tab and leaves the headline at rest.

sync

string

Link hover and pins with every card that uses the same name, matched by x value. A click pins them all, with a ghost pin on the others; Alt-click pins one card only.

numberStyle

How the headline animates when its value changes. Count (default) counts to the new value.

motion

'auto' | 'none'

None turns off decorative motion; reduced motion does this automatically.

aggregate

'sum' | 'mean' | 'last' | 'max'

Summary at rest: sum for counts, mean for rates, last for levels, or max for peaks. Area defaults to sum; Range defaults to mean.

defaultRange

string

Initial range id; defaults to the first supplied range.

locale

string

Locale used for number formatting. Defaults to en-US.

formatValue

(value: number) => string

Custom value text, taking precedence over valueFormat.

formatAxisValue

(value: number) => string

Custom compact axis value text.

formatX

(value: string | number | Date) => string

Custom x label text.

xType

'category' | 'number' | 'time'

Override inferred x type. Use time for numeric Unix timestamps in milliseconds.

spotlight

boolean

Highlight the inspected position in the plot background. Defaults to true.

badge

ReactNode

Content in the tab above the card. A comparison badge can replace this while a comparison is active.

className

string

Additional class on the card frame.

style

CSSProperties | ChartStyle

Inline styles and scoped --lilt-* chart variables.

pillValue

'series' | 'stack'

Read an individual series value (default) or its stacked height. Has no effect when the card has no stacked series.

decimate

boolean

Defaults to true. Line and Area marks retain at most four observations per pixel column. Other marks draw every row; inspection and summaries always read the full data.

tiles

boolean

Show the range series value tile beneath the plot. Defaults to false.

Chart style

Palette

Theme

Appearance

Reading & motion

Usage

Data

Timeline intervals

Props

Chart style

Palette

Theme

Appearance

Reading & motion

Range chart

Usage

Data

Timeline intervals

Props