How do I create a word cloud chart in JavaScript?

Install with `npm install katucharts.js`, then call KatuCharts.chart(container, { chart: { type: 'wordcloud' }, series: [...] }).

Why does my word cloud chart render as a line chart?

The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type " ", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.

Why do I get "Cannot read properties of null (reading 'appendChild')"?

The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.

Why is the chart rendering with zero height?

The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

Other

Word Cloud

type: 'wordcloud'

Words sized by weight and placed without overlap along a spiral. Useful for term frequency and tag clouds.

Edit the JSON on the right and press Run (or ⌘/Ctrl + Enter) — data, titles, categories and colors all update live.

Live

Word Cloud

Edit · JSON

{
  "chart": {
    "type": "wordcloud"
  },
  "title": {
    "text": "Word Frequency"
  },
  "series": [
    {
      "name": "Words",
      "minFontSize": 12,
      "maxFontSize": 54,
      "rotation": {
        "orientations": [
          0,
          90
        ]
      },
      "dataLabels": {
        "style": {
          "fontFamily": "var(--font-mono), monospace"
        }
      },
      "data": [
        {
          "name": "data",
          "weight": 100
        },
        {
          "name": "charts",
          "weight": 86
        },
        {
          "name": "visualization",
          "weight": 70
        },
        {
          "name": "declarative",
          "weight": 56
        },
        {
          "name": "interactive",
          "weight": 50
        },
        {
          "name": "responsive",
          "weight": 45
        },
        {
          "name": "streaming",
          "weight": 40
        },
        {
          "name": "finance",
          "weight": 38
        },
        {
          "name": "genomics",
          "weight": 35
        },
        {
          "name": "accessible",
          "weight": 32
        },
        {
          "name": "export",
          "weight": 30
        },
        {
          "name": "themes",
          "weight": 28
        },
        {
          "name": "sankey",
          "weight": 25
        },
        {
          "name": "heatmap",
          "weight": 24
        },
        {
          "name": "polar",
          "weight": 22
        },
        {
          "name": "treemap",
          "weight": 20
        },
        {
          "name": "candlestick",
          "weight": 18
        },
        {
          "name": "volcano",
          "weight": 16
        },
        {
          "name": "manhattan",
          "weight": 14
        },
        {
          "name": "circos",
          "weight": 12
        },
        {
          "name": "gauge",
          "weight": 11
        },
        {
          "name": "bubble",
          "weight": 10
        },
        {
          "name": "scatter",
          "weight": 9
        },
        {
          "name": "boxplot",
          "weight": 8
        }
      ]
    }
  ]
}

Data format

{ name: string, weight: number, color? }

Data shape

The JSON you pass inside the chart — drop it straight into your series.

data: [
  { name: 'data', weight: 100 },
  { name: 'charts', weight: 86 },
  { name: 'visualization', weight: 70 }
]

Example

import KatuCharts from 'katucharts.js';

KatuCharts.chart('container', {
  chart: { type: 'wordcloud' },
  series: [{
    rotation: { orientations: [0, 90] },
    data: [
      { name: 'data', weight: 100 },
      { name: 'charts', weight: 86 },
      { name: 'visualization', weight: 70 }
    ]
  }]
});

Type-specific options

Option	Description
`minFontSize / maxFontSize`	Font-size range mapped from weight (default 8–50).
`rotation`	Angle cycle — { orientations: [0, 90] } or { from, to }.

Common errors

Why does my word cloud chart render as a line chart?: The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
Why do I get "Cannot read properties of null (reading 'appendChild')"?: The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
Why is the chart rendering with zero height?: The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

FAQ

How do I create a word cloud chart in JavaScript?: Install with `npm install katucharts.js`, then call KatuCharts.chart(container, { chart: { type: 'wordcloud' }, series: [...] }).
Why does my word cloud chart render as a line chart?: The chart type was not registered. KatuCharts logs "KatuCharts: unknown series type "<type>", falling back to line" and draws a line chart rather than throwing. Import the module the type belongs to — for example `import 'katucharts.js/bio';` — before creating the chart.
Why do I get "Cannot read properties of null (reading 'appendChild')"?: The container element does not exist when the chart is created. Create the chart after the element is in the DOM: in React that means inside useEffect, not during render.
Why is the chart rendering with zero height?: The container has no height. A div with no content collapses to zero. Give it a height in CSS, or pass `chart: { height: 400 }` in the options.

Common options (color, visible, marker, dataLabels, animation, events, zones…) apply to every type — see Configuration → series. See it rendered in the gallery.