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Chart.js Word Clouds

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sgratzl/chartjs-chart-wordcloud

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NPM PackageGithub Actions

Chart.js module for charting word or tag clouds. Adding new chart type:wordCloud.

word cloud example

Related Plugins

Check out also my other chart.js plugins:

Install

npm install --save chart.js chartjs-chart-wordcloud

Usage

seeExamples

or at thisOpen in CodePen

Word Cloud

Data Structure

constconfig={type:'wordCloud',data:{// textlabels:['Hello','world','normally','you','want','more','words','than','this'],datasets:[{label:'DS',// size in pixeldata:[90,80,70,60,50,40,30,20,10],},],},options:{},};

Styling of elements

A word has the basic FontSpec styling options (family, color, ...). In addition it has several options regarding rotating the text.

Controller options:

exportinterfaceIWordCloudControllerDatasetOptions
extendsIControllerDatasetOptions,
ScriptableAndArrayOptions<IWordElementOptions>,
ScriptableAndArrayOptions<ICommonHoverOptions>{
/**
* whether to fit the word cloud to the map, by scaling to the actual bounds
*@default true
*/
fit:boolean;
}

Word element options:

exportinterfaceIWordElementOptionsextendsIFontSpec{
/**
* rotation of the word
*@default undefined then it will be randomly derived given the other constraints
*/
rotate:number;
/**
* number of rotation steps between min and max rotation
*@default 2
*/
rotationSteps:number;
/**
* angle in degree for the min rotation
*@default -90
*/
minRotation:number;
/**
* angle in degree for the max rotation
*@default 0
*/
maxRotation:number;
/**
* padding around each word while doing the layout
*@default 1
*/
padding:number;
}

ESM and Tree Shaking

The ESM build of the library supports tree shaking thus having no side effects. As a consequence the chart.js library won't be automatically manipulated nor new controllers automatically registered. One has to manually import and register them.

Variant A:

import{Chart}from'chart.js';import{WordCloudController,WordElement}from'chartjs-chart-wordcloud';Chart.register(WordCloudController,WordElement);...newChart(ctx,{type:WordCloudController.id,data:[...],});

Variant B:

import{WordCloudChart}from'chartjs-chart-wordcloud';newWordCloudChart(ctx,{data:[...],});

Development Environment

npm i -g yarnyarn installyarn sdks vscode

Common commands

yarn compileyarntestyarn lintyarn fixyarn buildyarn docs

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