@unovis/ts

Unovis core package for vanilla TypeScript/JavaScript. Version 1.7.0, Apache-2.0, ES modules only ("type": "module"). Renders SVG (plus Leaflet/MapLibre for maps) into a DOM element. Source paths cited below are relative to the package root (node_modules/@unovis/ts/).

Install (per README.md and https://unovis.dev/docs/intro):

npm install -P @unovis/ts

TypeScript setup

• Enable allowSyntheticDefaultImports in compilerOptions (required by Unovis dependencies). Source: https://unovis.dev/docs/intro
• If tsconfig.json lists types explicitly, add "topojson-client" to it. Source: https://unovis.dev/docs/intro
• Styles are injected at runtime via @emotion/css (declared in package.json sideEffects: styles/index.js). Importing any component injects the global CSS variables. Do not import a CSS file; there is none. For strict CSP sites read https://unovis.dev/docs/guides/csp

Architecture

Three building blocks (README.md, index.js):

• Containers own the DOM element, the data, size, and rendering.
  • XYContainer(element, config, data) — multiple XY components plus xAxis, yAxis, tooltip, crosshair, annotations slots (containers/xy-container/config.d.ts).
  • SingleContainer(element, config, data) — exactly one component (component slot), e.g. Graph, Sankey, TopoJSONMap, Donut, Treemap (containers/single-container/config.d.ts).
• Components are constructed with their config: new Line({ x, y }). They hold no data; the container feeds them the data array.
• Standalone components need no container: LeafletMap, LeafletFlowMap, and the legends (BulletLegend, RollingPinLegend, FlowLegend). Source: https://unovis.dev/docs/intro

Data records are generic (Line<Datum>), read through accessors: a value or a function (d, i) => value. Types in types/accessor.d.ts: NumericAccessor, StringAccessor, ColorAccessor, BooleanAccessor, GenericAccessor.

import { Axis, Line, XYContainer } from '@unovis/ts'

type DataRecord = { x: number; y: number }
const data: DataRecord[] = [
  { x: 0, y: 0 },
  { x: 1, y: 2 },
  { x: 2, y: 1 },
]

const line = new Line<DataRecord>({
  x: d => d.x,
  y: d => d.y,
})

const chart = new XYContainer(document.getElementById('vis-container')!, {
  components: [line],
  xAxis: new Axis(),
  yAxis: new Axis(),
}, data)

Individual imports are tree-shakable and equivalent (@unovis/ts/containers/xy-container, @unovis/ts/components/line, ...). Source: https://unovis.dev/docs/quick-start. Heavy parts (Graph layouts, LeafletMap renderer) load via dynamic import after initialization.

Update lifecycle

Data lives on the container; configs live on components. Update through the container's public API (containers/xy-container/index.d.ts):

SingleContainer has updateComponent (singular) instead of updateComponents (containers/single-container/index.d.ts). Pass preventRender: true to defer rendering when batching updates.

Always call chart.destroy() when tearing down (SPA route change, test teardown). It removes the ResizeObserver, DOM node, and timers (core/container/index.d.ts).

Sizing

Container config width/height accept pixels or CSS units but not % (core/container/config.d.ts). For percentage sizing, set width/height via CSS on the container's DOM element instead. sizing controls fit behavior: Sizing.Fit (default), Sizing.Extend, Sizing.FitWidth (types/component.d.ts).

Common recipes

Tooltip and crosshair go in the container config, not the components array:

import { Axis, Crosshair, Line, Tooltip, XYContainer } from '@unovis/ts'

const tooltip = new Tooltip()
const crosshair = new Crosshair<DataRecord>({
  color: d => d.color ?? null,
  template: d => `<div>${d.x}: ${d.y}</div>`,
})

const chart = new XYContainer(el, {
  components: [line],
  xAxis: new Axis(),
  yAxis: new Axis(),
  tooltip,
  crosshair,
}, data)

Stacked bars use one y accessor per stack level:

import { Axis, StackedBar, XYContainer } from '@unovis/ts'

const bar = new StackedBar<DataRecord>({
  y: [d => d.a, d => d.b],
})
new XYContainer(el, { components: [bar], xAxis: new Axis(), yAxis: new Axis() }, data)

A graph lives in a SingleContainer with { nodes, links } data:

import { Graph, GraphLayoutType, SingleContainer } from '@unovis/ts'

const graph = new Graph<GraphNodeDatum, GraphLinkDatum>({
  layoutType: GraphLayoutType.Force,
  linkStroke: l => l.color ?? null,
  nodeSize: n => n.size ?? 10,
})

const chart = new SingleContainer(el, { component: graph }, {
  nodes: [{ id: 'a' }, { id: 'b' }],
  links: [{ source: 'a', target: 'b' }],
})

Events are declared per-component with CSS selectors exposed as static selectors on each component class (core/component/config.d.ts):

const area = new Area<DataRecord>({
  x: d => d.x,
  y: d => d.y,
  events: {
    [Area.selectors.area]: {
      click: d => console.log('clicked', d),
    },
  },
  attributes: { // stable hooks for E2E tests
    [Area.selectors.area]: { 'test-value': d => String(d.y) },
  },
})

Map with bundled TopoJSON (maps.d.ts exports WorldMapTopoJSON, USATopoJSON, GermanyTopoJSON, UKTopoJSON, FranceTopoJSON, IndiaTopoJSON, ChinaTopoJSON, USCountiesTopoJSON, WorldMapSimplestTopoJSON, WorldMap110mAlphaTopoJSON):

import { SingleContainer, TopoJSONMap, WorldMapTopoJSON } from '@unovis/ts'

const map = new TopoJSONMap<AreaDatum, PointDatum>({
  topojson: WorldMapTopoJSON,
  mapFeatureName: 'countries',
  areaColor: d => d.color ?? null,
  pointColor: d => d.color ?? null,
  longitude: d => d.longitude ?? null,
  latitude: d => d.latitude ?? null,
})
new SingleContainer(el, { component: map }, areaData)

Rules and pitfalls

• Do not mutate component.config or container.config directly; call the update* methods so changes merge with defaults and re-render.
• Axis instances for xAxis/yAxis need no type; the container assigns it (containers/xy-container/config.d.ts). Set type only for a standalone Axis in components.
• Colors: component color accessors returning null fall back to the container palette (--vis-color<N> CSS variables). Use colorKeys on XY components to map series to colors (core/xy-component/config.d.ts).
• Animation duration: container duration overrides all components; component duration (default 600) applies to data transitions.
• Numeric string enums (CurveType, SymbolType, Position, ...) also accept their raw string values, e.g. curveType: 'monotoneX'.
• Package targets browsers. Node usage needs a DOM shim (the library's own tests run Vitest with jsdom, package.json scripts).

References

• API surface — full export catalog, container and component class API, events/attributes, tooltips.
• Components — per-component key configs, defaults, and data shapes.
• Styling and theming — color palette, CSS variables, dark theme, patterns, testing.

Official documentation: https://unovis.dev/docs/intro — component reference at https://unovis.dev/docs/components/<Name> (e.g. /docs/components/Line), containers at /docs/containers/XY_Container and /docs/containers/Single_Container. Gallery: https://unovis.dev/gallery. Release notes: https://github.com/f5/unovis/releases (current prepared version 1.7.0, package.json).