sy-word-cloud

Word Cloud

Represent word weights through text size.

sy-word-cloud

Use for a quick overview of keyword frequency and topics.

Word length also affects perceived size. Use a table for exact rankings and values.

Base chart tier: Community. Features such as additional renderers and custom branding have separate entitlement requirements.

InputData description
valuesAn array of [word, weight] or { name, weight }.
weightScaleThe scale converting weights to text sizes.

Complete implementation example

html
<div id="chart-container" style="width: 100%; min-width: 0;"></div>

<script type="module">
  import { defineCustomElement as define0 } from '@syidax/advanced/components/sy-word-cloud.js';
  define0();

  const specs = [
    {
      "id": "example-chart",
      "tag": "sy-word-cloud",
      "props": {
        "engine": "standard",
        "values": [
          ["Data", 40],
          ["Design", 32],
          ["chart", 28],
          ["Usability", 24],
          ["Analysis", 20],
          ["Trust", 18],
          ["Collaboration", 16],
          ["Accessibility", 14],
          ["Performance", 12]
        ],
        "weightScale": "sqrt",
        "width": 640,
        "height": 360,
        "brandPosition": "bottom-right",
        "brandLogo": ""
      }
    }
  ];
  const container = document.querySelector('#chart-container');
  const elements = specs.map(({ tag, id, props }) => {
    const element = document.createElement(tag);
    element.id = id;
    Object.assign(element, props);
    element.setAttribute('aria-label', 'word-cloud example chart');
    return element;
  });
  container.replaceChildren(...elements);
  const chart = elements.at(-1);
  const onEvent = event => {
    console.log('pointClick', event.detail);
  };
  chart.addEventListener('pointClick', onEvent);
  const observer = new ResizeObserver(([entry]) => {
    const width = Math.max(160, Math.floor(entry.contentRect.width));
    elements.forEach(element => { element.width = width; });
  });
  observer.observe(container);

  // In an SPA, call this function when the view is disposed.
  function disposeChart() {
    observer.disconnect();
    chart.removeEventListener('pointClick', onEvent);
    container.replaceChildren();
  }
</script>

Properties

values

An array of [word, weight] or { name, weight }.

ItemValue
JavaScript propertyvalues
HTML attributePass objects, arrays, and callbacks as JavaScript properties
TypeWordCloudValues
Default[]

width

Chart width in pixels. If the container width changes, update width from a ResizeObserver.

ItemValue
JavaScript propertywidth
HTML attributewidth
Typenumber
Default520

height

Chart height in pixels. Allow space for axes, titles, and the legend.

ItemValue
JavaScript propertyheight
HTML attributeheight
Typenumber
Default400

brandPosition

The corner where the logo is anchored. Community and Pro both support all four corners, using the same position on screen and in image exports.

ItemValue
JavaScript propertybrandPosition
HTML attributebrand-position
Type'top-left' | 'top-right' | 'bottom-left' | 'bottom-right'
Default'bottom-right'
Allowed valuestop-left, top-right, bottom-left, bottom-right

palette

Allowed values: tableau10, tableau20, observable10, paired12, set3_12. Default: 'tableau10'.

ItemValue
JavaScript propertypalette
HTML attributepalette
TypeWordCloudPaletteName
Default'tableau10'
Allowed valuestableau10, tableau20, observable10, paired12, set3_12

colors

Pass as a JavaScript property. type: ReadonlyArray<string>.

ItemValue
JavaScript propertycolors
HTML attributePass objects, arrays, and callbacks as JavaScript properties
TypeReadonlyArray<string>
Defaultundefined

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

minFontSize

Smallest rendered font in px (Highcharts minFontSize).

ItemValue
JavaScript propertyminFontSize
HTML attributemin-font-size
Typenumber
Default10

maxFontSize

Font of the heaviest word in px (Highcharts maxFontSize).

ItemValue
JavaScript propertymaxFontSize
HTML attributemax-font-size
Typenumber
Default44

weightScale

The scale converting weights to text sizes.

ItemValue
JavaScript propertyweightScale
HTML attributeweight-scale
TypeWordCloudWeightScale
Default'linear'
Allowed valueslinear, sqrt, log

spiral

Spiral search pattern; rectangular = Highcharts default.

ItemValue
JavaScript propertyspiral
HTML attributespiral
TypeWordCloudSpiral
Default'rectangular'
Allowed valuesrectangular, archimedean

orientations

Number of distinct orientations in the rotation cycle (Highcharts rotation.orientations).

ItemValue
JavaScript propertyorientations
HTML attributeorientations
Typenumber
Default2

rotationFrom

Rotation cycle start in degrees (Highcharts rotation.from).

ItemValue
JavaScript propertyrotationFrom
HTML attributerotation-from
Typenumber
Default0

rotationTo

Rotation cycle end in degrees (Highcharts rotation.to).

ItemValue
JavaScript propertyrotationTo
HTML attributerotation-to
Typenumber
Default90

wordPadding

Empty px kept between word boxes.

ItemValue
JavaScript propertywordPadding
HTML attributeword-padding
Typenumber
Default2

fontFamily

Set as an HTML attribute or JavaScript property. type: string.

ItemValue
JavaScript propertyfontFamily
HTML attributefont-family
Typestring
Default'system-ui, sans-serif'

fontWeight

Set as an HTML attribute or JavaScript property. type: string.

ItemValue
JavaScript propertyfontWeight
HTML attributefont-weight
Typestring
Default'600'

chartTitle

The title inside the chart. Explain the data's unit and meaning alongside it.

ItemValue
JavaScript propertychartTitle
HTML attributechart-title
Typestring
Defaultundefined

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

chartSubtitle

The subtitle inside the chart.

ItemValue
JavaScript propertychartSubtitle
HTML attributechart-subtitle
Typestring
Defaultundefined

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

tooltipShow

Whether to display the built-in tooltip.

ItemValue
JavaScript propertytooltipShow
HTML attributetooltip-show
Typeboolean
Defaulttrue

tooltipFormat

Pass as a JavaScript property. type: (word: WordCloudResolvedWord) => string.

ItemValue
JavaScript propertytooltipFormat
HTML attributePass objects, arrays, and callbacks as JavaScript properties
Type(word: WordCloudResolvedWord) => string
Defaultundefined

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

tooltip

Rich tooltip configuration object — the word-flavoured counterpart of the item .tooltip API (trigger/openMode/connector/draggable/interactive/ format/html/style/side/sizing). When set it wins over the flat tooltip-show / tooltipFormat props. Property-only.

ItemValue
JavaScript propertytooltip
HTML attributePass objects, arrays, and callbacks as JavaScript properties
TypeWordCloudTooltipInput
Defaultundefined
Literals in the typeauto, off

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

enableMouseTracking

Set as an HTML attribute or JavaScript property. type: boolean.

ItemValue
JavaScript propertyenableMouseTracking
HTML attributeenable-mouse-tracking
Typeboolean
Defaulttrue

zoom

Viewport zoom — the zoom attribute the cartesian charts carry: a mode ('x' | 'y' | 'xy'), true (x) or an object; off by default. The drawing rectangle (the cloud below the title band) is the plot — x runs 0 → 1 left to right, y 0 → 1 bottom to top — and the words are magnified into the window; words outside it leave the rectangle. Property-only (a mode string also works as an attribute).

ItemValue
JavaScript propertyzoom
HTML attributePass objects, arrays, and callbacks as JavaScript properties
TypeCartesianZoomInput
Defaultundefined
Literals in the typeauto, off, true, false, x, y, xy, inside

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

engine

Renderer selection: auto, standard, or pro. Engine selection is separate from permission to use a Pro chart type.

ItemValue
JavaScript propertyengine
HTML attributeengine
TypeWordCloudEngineMode
Default'auto'
Allowed valuesauto, standard, pro

unavailable

Allowed values: fallback, error, throw. Default: 'fallback'.

ItemValue
JavaScript propertyunavailable
HTML attributeunavailable
TypeWordCloudUnavailableBehaviour
Default'fallback'
Allowed valuesfallback, error, throw

streamSource

A stream source for live data. Check the contract for the specific type.

ItemValue
JavaScript propertystreamSource
HTML attributePass objects, arrays, and callbacks as JavaScript properties
TypeWordCloudStreamSource
Defaultundefined

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

streamWindow

The streaming data range to keep visible.

ItemValue
JavaScript propertystreamWindow
HTML attributestream-window
Typenumber
Defaultundefined

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

streamMax

The maximum number of streaming data points to retain.

ItemValue
JavaScript propertystreamMax
HTML attributestream-max
Typenumber
Defaultundefined

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

animated

Whether to animate initial display and data changes.

ItemValue
JavaScript propertyanimated
HTML attributeanimate
Typeboolean
Defaultfalse

animationDuration

Animation duration in milliseconds.

ItemValue
JavaScript propertyanimationDuration
HTML attributeanimation-duration
Typenumber
Default600

animationEasing

Allowed values: linear, ease-out, ease-in, ease-in-out. Default: 'ease-out'.

ItemValue
JavaScript propertyanimationEasing
HTML attributeanimation-easing
TypeWordCloudEasing
Default'ease-out'
Allowed valueslinear, ease-out, ease-in, ease-in-out

animationType

Allowed values: initial, update. Default: undefined.

ItemValue
JavaScript propertyanimationType
HTML attributeanimation-type
TypeWordCloudAnimationType
Defaultundefined
Allowed valuesinitial, update

undefined means this property was not explicitly set. The effective value may depend on the chart type and other settings.

Events

rendered

Emits rendering results in detail when chart drawing completes.

Event name: rendered. Names are case-sensitive. Read the payload from detail on CustomEvent<WordCloudRenderResult & { tier: WordCloudEngineTier }>.

javascript
chart.addEventListener('rendered', event => {
  console.log(event.detail); // WordCloudRenderResult & { tier: WordCloudEngineTier }
});

pointClick

A point selection event. Read the selected data and index from CustomEvent.detail.

Event name: pointClick. Names are case-sensitive. Read the payload from detail on CustomEvent<WordCloudPointEventDetail>.

javascript
chart.addEventListener('pointClick', event => {
  console.log(event.detail); // WordCloudPointEventDetail
});

pointHover

CustomEvent.detail type: WordCloudPointEventDetail | null. Event names are case-sensitive.

Event name: pointHover. Names are case-sensitive. Read the payload from detail on CustomEvent<WordCloudPointEventDetail | null>.

javascript
chart.addEventListener('pointHover', event => {
  console.log(event.detail); // WordCloudPointEventDetail | null
});

pointContextMenu

CustomEvent.detail type: ChartPointContextMenuEventDetail<WordCloudPointEventDetail>. Event names are case-sensitive.

Event name: pointContextMenu. Names are case-sensitive. Read the payload from detail on CustomEvent<ChartPointContextMenuEventDetail<WordCloudPointEventDetail>>.

javascript
chart.addEventListener('pointContextMenu', event => {
  console.log(event.detail); // ChartPointContextMenuEventDetail<WordCloudPointEventDetail>
});

appended

CustomEvent.detail type: { count: number }. Event names are case-sensitive.

Event name: appended. Names are case-sensitive. Read the payload from detail on CustomEvent<{ count: number }>.

javascript
chart.addEventListener('appended', event => {
  console.log(event.detail); // { count: number }
});

windowSlid

CustomEvent.detail type: { dropped: number }. Event names are case-sensitive.

Event name: windowSlid. Names are case-sensitive. Read the payload from detail on CustomEvent<{ dropped: number }>.

javascript
chart.addEventListener('windowSlid', event => {
  console.log(event.detail); // { dropped: number }
});

chartAnimationStart

CustomEvent.detail type: void. Event names are case-sensitive.

Event name: chartAnimationStart. Names are case-sensitive. Read the payload from detail on CustomEvent<void>.

javascript
chart.addEventListener('chartAnimationStart', event => {
  console.log(event.detail); // void
});

chartAnimationEnd

CustomEvent.detail type: void. Event names are case-sensitive.

Event name: chartAnimationEnd. Names are case-sensitive. Read the payload from detail on CustomEvent<void>.

javascript
chart.addEventListener('chartAnimationEnd', event => {
  console.log(event.detail); // void
});

chartAnimationInterrupted

CustomEvent.detail type: void. Event names are case-sensitive.

Event name: chartAnimationInterrupted. Names are case-sensitive. Read the payload from detail on CustomEvent<void>.

javascript
chart.addEventListener('chartAnimationInterrupted', event => {
  console.log(event.detail); // void
});

tooltipShow

Whether to display the built-in tooltip.

Event name: tooltipShow. Names are case-sensitive. Read the payload from detail on CustomEvent<WordCloudTooltipShowEventDetail>.

javascript
chart.addEventListener('tooltipShow', event => {
  console.log(event.detail); // WordCloudTooltipShowEventDetail
});

tooltipHide

CustomEvent.detail type: void. Event names are case-sensitive.

Event name: tooltipHide. Names are case-sensitive. Read the payload from detail on CustomEvent<void>.

javascript
chart.addEventListener('tooltipHide', event => {
  console.log(event.detail); // void
});

tooltipAction

CustomEvent.detail type: WordCloudTooltipActionEventDetail. Event names are case-sensitive.

Event name: tooltipAction. Names are case-sensitive. Read the payload from detail on CustomEvent<WordCloudTooltipActionEventDetail>.

javascript
chart.addEventListener('tooltipAction', event => {
  console.log(event.detail); // WordCloudTooltipActionEventDetail
});

zoomChange

Every zoom / pan change (drag, pan, wheel, pinch, keyboard, API, reset).

Event name: zoomChange. Names are case-sensitive. Read the payload from detail on CustomEvent<CartesianZoomChangeEventDetail>.

javascript
chart.addEventListener('zoomChange', event => {
  console.log(event.detail); // CartesianZoomChangeEventDetail
});

Methods

redraw

Redraw the chart using its current data and options. Inspect the rendered result after the returned Promise resolves.

typescript
redraw(): Promise<WordCloudRenderResult>

Return type: Promise<WordCloudRenderResult>. Call the method after element registration and await its Promise result.

getActiveTier

An asynchronous method. Check the argument and return types below.

typescript
getActiveTier(): Promise<WordCloudEngineTier>

Return type: Promise<WordCloudEngineTier>. Call the method after element registration and await its Promise result.

addWord

Word-cloud-only — add a word datum.

typescript
addWord(datum: WordCloudDatum, opts?: { insertAt?: number }): Promise<number>
ArgumentsTypeRequired
datumWordCloudDatumRequired
opts{ insertAt?: number }Optional

Return type: Promise<number>. Call the method after element registration and await its Promise result.

removeWord

Word-cloud-only — remove a word by id, name, or index.

typescript
removeWord(idOrIndex: string | number): Promise<boolean>
ArgumentsTypeRequired
idOrIndexstring | numberRequired

Return type: Promise<boolean>. Call the method after element registration and await its Promise result.

updateWord

Word-cloud-only — patch a word's datum fields.

typescript
updateWord(idOrIndex: string | number, patch: Partial<Exclude<WordCloudDatum, readonly [string, number]>>): Promise<boolean>
ArgumentsTypeRequired
idOrIndexstring | numberRequired
patchPartial<Exclude<WordCloudDatum, readonly [string, number]>>Required

Return type: Promise<boolean>. Call the method after element registration and await its Promise result.

setWordWeight

Word-cloud-only — set a word's weight.

typescript
setWordWeight(idOrIndex: string | number, weight: number): Promise<boolean>
ArgumentsTypeRequired
idOrIndexstring | numberRequired
weightnumberRequired

Return type: Promise<boolean>. Call the method after element registration and await its Promise result.

appendPoint

Append one value to the stream. Check the argument type and the licensing requirements for streaming.

typescript
appendPoint(datum: WordCloudDatum): Promise<void>
ArgumentsTypeRequired
datumWordCloudDatumRequired

Return type: Promise<void>. Call the method after element registration and await its Promise result.

appendBatch

Append multiple values to the stream. Check the argument type and the licensing requirements for streaming.

typescript
appendBatch(datums: ReadonlyArray<WordCloudDatum>): Promise<void>
ArgumentsTypeRequired
datumsReadonlyArray<WordCloudDatum>Required

Return type: Promise<void>. Call the method after element registration and await its Promise result.

shift

Drops the LIGHTEST words (a cloud has no timeline; "oldest" is meaningless).

typescript
shift(count?: number): Promise<void>
ArgumentsTypeRequired
countnumberOptional

Return type: Promise<void>. Call the method after element registration and await its Promise result.

replace

Swap the streamed set (replace([]) clears it); the base values never leave. Without chart.streaming the dies upsert into the base like a batch (quietly: no appended, no binChanged, as a ring replace).

typescript
replace(datums: ReadonlyArray<WordCloudDatum>): Promise<void>
ArgumentsTypeRequired
datumsReadonlyArray<WordCloudDatum>Required

Return type: Promise<void>. Call the method after element registration and await its Promise result.

getStreamSource

The stream session's source (Chart Pro): like the stream methods it waits for a license still being confirmed.

typescript
getStreamSource(): Promise<WordCloudStreamSource | undefined>

Return type: Promise<WordCloudStreamSource | undefined>. Call the method after element registration and await its Promise result.

setAnimation

An asynchronous method. Check the argument and return types below.

typescript
setAnimation(options: { duration?: number; easing?: WordCloudEasing; enabled?: boolean; type?: WordCloudAnimationType }): Promise<void>
ArgumentsTypeRequired
options{ duration?: number; easing?: WordCloudEasing; enabled?: boolean; type?: WordCloudAnimationType }Required

Return type: Promise<void>. Call the method after element registration and await its Promise result.

pauseAnimation

Pause the current animation.

typescript
pauseAnimation(): Promise<void>

Return type: Promise<void>. Call the method after element registration and await its Promise result.

resumeAnimation

Resume a paused animation.

typescript
resumeAnimation(): Promise<void>

Return type: Promise<void>. Call the method after element registration and await its Promise result.

replayAnimation

Replay the initial staggered reveal. No-op when animation is off.

typescript
replayAnimation(): Promise<void>

Return type: Promise<void>. Call the method after element registration and await its Promise result.

hitTestWord

The word under a host px position (the zoomed view is honoured: the point is taken back to the layout first).

typescript
hitTestWord(cssX: number, cssY: number): Promise<{ index: number; id: string; name: string } | null>
ArgumentsTypeRequired
cssXnumberRequired
cssYnumberRequired

Return type: Promise<{ index: number; id: string; name: string } | null>. Call the method after element registration and await its Promise result.

getDroppedWords

Words the spiral could not fit (diagnostics parity with the layout core).

typescript
getDroppedWords(): Promise<Array<{ index: number; id: string; name: string; weight: number }>>

Return type: Promise<Array<{ index: number; id: string; name: string; weight: number }>>. Call the method after element registration and await its Promise result.

showTooltipAtWord

Word-cloud-only — programmatic tooltip open on a word.

typescript
showTooltipAtWord(idOrIndex: string | number): Promise<WordCloudPointEventDetail | null>
ArgumentsTypeRequired
idOrIndexstring | numberRequired

Return type: Promise<WordCloudPointEventDetail | null>. Call the method after element registration and await its Promise result.

hideTooltip

Close the currently visible tooltip.

typescript
hideTooltip(): Promise<void>

Return type: Promise<void>. Call the method after element registration and await its Promise result.

zoomTo

Zoom to explicit windows of the drawing (x / y as { min, max } or [min, max] over 0..1; null clears that orientation).

typescript
zoomTo(request: CartesianZoomRequest): Promise<CartesianZoomChangeEventDetail | null>
ArgumentsTypeRequired
requestCartesianZoomRequestRequired

Return type: Promise<CartesianZoomChangeEventDetail | null>. Call the method after element registration and await its Promise result.

zoomBy

Scale the current windows by factor (< 1 zooms in) around anchorFraction (0..1, default centre).

typescript
zoomBy(factor: number, anchorFraction?: number): Promise<CartesianZoomChangeEventDetail | null>
ArgumentsTypeRequired
factornumberRequired
anchorFractionnumberOptional

Return type: Promise<CartesianZoomChangeEventDetail | null>. Call the method after element registration and await its Promise result.

panBy

Slide the zoomed windows by a fraction of the drawing ({ x?, y? }); a no-op at the full extent.

typescript
panBy(delta: { x?: number; y?: number }): Promise<CartesianZoomChangeEventDetail | null>
ArgumentsTypeRequired
delta{ x?: number; y?: number }Required

Return type: Promise<CartesianZoomChangeEventDetail | null>. Call the method after element registration and await its Promise result.

resetZoom

Reset the zoomed or panned range to the original data range.

typescript
resetZoom(): Promise<CartesianZoomChangeEventDetail | null>

Return type: Promise<CartesianZoomChangeEventDetail | null>. Call the method after element registration and await its Promise result.

getZoom

Read the current zoom range. Check the return type's nullability and the range for each axis.

typescript
getZoom(): Promise<CartesianZoomState | null>

Return type: Promise<CartesianZoomState | null>. Call the method after element registration and await its Promise result.

getZoomExtent

The full extent of the drawing (0..1 on both orientations, the id-less slot key).

typescript
getZoomExtent(request?: CartesianZoomExtentRequest): Promise<CartesianZoomExtentDetail | null>
ArgumentsTypeRequired
requestCartesianZoomExtentRequestOptional

Return type: Promise<CartesianZoomExtentDetail | null>. Call the method after element registration and await its Promise result.

getEngineStatus

Requested engine vs what runs, and why (CHART-ADD-08): always Standard (this type has no WebGPU renderer); read without side effects, never consults the license.

typescript
getEngineStatus(): Promise<ChartEngineStatus>

Return type: Promise<ChartEngineStatus>. Call the method after element registration and await its Promise result.