# Sunburst Chart

Source: https://lumeo.nativ.sh/components/charts/sunburst

# Sunburst Chart

Visualize hierarchical data in concentric rings. Each ring represents a level in the hierarchy, radiating outward from the center.

## Installation

.NET CLI PackageReference Lumeo CLI

dotnet add package Lumeo.Charts

One-time app setup (`AddLumeo()`, CSS & JS) is covered in the [installation guide](docs/introduction).

## Usage

@using Lumeo

<SunburstChart />

Preview Code

Regional Revenue Sunburst

Preview Code

Loading state

Simulate loading

Hold skeleton open

Duration: 2s 

Cycle: 1400 ms 

Shape-aware skeleton with reserved space for legend and axes — no layout shift when real data arrives.

## API Reference

### SunburstChart

Property

Type

Default

Description

Data

List<SunburstData>

\[\]

Hierarchical data with Name, Value, and optional Children.

ShowLegend

bool

true

Shows or hides the chart legend.

Colors

List<string>?

null

Custom color palette.

IsLoading

bool

false

When true, renders a shape-matched loading skeleton in place of the chart. Bind to your async fetch state.

ShowLoadingSkeleton

bool

true

Set to false to opt out of the skeleton (chart area stays empty while IsLoading is true).

SkeletonKind

ChartSkeletonKind

(chart default)

Override the skeleton silhouette (Bars, Line, Area, Pie, Scatter, Grid, Generic).

SkeletonStyle

ChartSkeletonStyle

Phantom

Phantom renders the real chart with placeholder data and morphs to real data via ECharts animation. Silhouette falls back to the legacy SVG skeleton overlay.

ShowLoadingLabel

bool

true

Shows a small "Loading…" pill in the top-right corner whenever `IsLoading` is true. Layered on top of any `SkeletonStyle`. Set to false for bare visuals. **(rc.18)**

LoadingText

string?

"Loading…"

Label rendered next to the spinner inside the loading pill. Set to empty to show the spinner alone. **(rc.18)**

ShowTooltip

bool

true

Shows the per-arc tooltip on hover with hierarchy path and value.

Width

string

"100%"

CSS width applied to the chart container.

Height

string

"350px"

CSS height applied to the chart container.

Theme

string?

null

Overrides the ECharts theme; null follows the app's light/dark mode.

PhantomCycleMs

int

1400

Phantom-mode refresh interval in milliseconds. Lower = faster data cycling while loading.

ShowDataLabels

bool

false

Renders the node name inside each sunburst arc.

LabelPosition

string

"inside"

Position of arc data labels (e.g. inside, outside).

LabelFormat

string?

null

ECharts format string applied to arc data labels.

DataZoom

bool

false

Enables zoom/pan controls on the sunburst chart.

Toolbox

bool

false

Shows the toolbox with save-as-image, restore, and view controls.

ColorPalette

List<string>?

null

Overrides the chart's base color palette across sunburst arcs.

AnimationDuration

int?

null

Override entry animation duration (ms); null uses the ECharts default.

AnimationEasing

string?

null

ECharts easing function name applied to entry animations.