How do I create a funnel chart in JavaScript?

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

Why does my funnel 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.

Pie / Hierarchical

Funnel

type: 'funnel'

Narrowing trapezoid stages showing conversion or attrition through a process.

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

Live

Funnel

Edit · JSON

Data format

[['stage', value]] · [{ name, y }]

Data shape

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

data: [
  { name: 'Visits', y: 5000 },
  { name: 'Signups', y: 2100 },
  { name: 'Paid', y: 920 }
]

Example

import KatuCharts from 'katucharts.js';

KatuCharts.chart('container', {
  chart: { type: 'funnel' },
  series: [{
    data: [
      { name: 'Visits', y: 5000 },
      { name: 'Signups', y: 2100 },
      { name: 'Paid', y: 920 }
    ]
  }]
});

Type-specific options

Option	Description
`neckWidth / neckHeight`	Funnel neck proportions.
`reversed`	Render as a pyramid.

Variations

Labels & neck

Tune the neck proportions and print each stage's value.

KatuCharts.chart('container', {
  chart: { type: 'funnel' },
  series: [{
    neckWidth: '30%', neckHeight: '25%',
    dataLabels: { enabled: true, format: '{point.name}: {point.y}' },
    data: [{ name: 'Visits', y: 5000 }, { name: 'Paid', y: 920 }]
  }]
});

Common errors

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