How do I create a network graph chart in JavaScript?

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

Why does my network graph 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.

Flow

Network Graph

type: 'networkgraph'

Force-directed graph; nodes repel while edges act as springs.

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

Live

Network Graph

Edit · JSON

Data format

nodes: [{ id, color? }], data: [{ from, to }] · [['A','B']]

Data shape

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

data: [
  { from: 'Core', to: 'Auth' },
  { from: 'Core', to: 'API' },
  { from: 'Core', to: 'Database' }
]

Example

import KatuCharts from 'katucharts.js';

KatuCharts.chart('container', {
  chart: { type: 'networkgraph' },
  series: [{
    data: [
      { from: 'Core', to: 'Auth' },
      { from: 'Core', to: 'API' },
      { from: 'Core', to: 'Database' }
    ]
  }]
});

Type-specific options

Option	Description
`link.length / link.strength`	Edge spring length / stiffness.
`node.marker`	Node marker styling.

Variations

Colored nodes & link length

Define nodes with their own colors and tune the spring length.

KatuCharts.chart('container', {
  chart: { type: 'networkgraph' },
  series: [{
    link: { length: 110 },
    nodes: [
      { id: 'Core', color: '#B43417' },
      { id: 'API',  color: '#2F6B5E' }
    ],
    data: [{ from: 'Core', to: 'API' }]
  }]
});

Common errors

Why does my network graph 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 network graph chart in JavaScript?: Install with `npm install katucharts.js`, then call KatuCharts.chart(container, { chart: { type: 'networkgraph' }, series: [...] }).
Why does my network graph 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.