replot-network: Network charts for react

Intelligent and customizable network chart components for react.

Installation

Only works with React projects. React must be installed separately.

npm install replot-network

Then with a module bundler like webpack/browserify that supports CommonJS/ES2015 modules, use as you would anything else.

import {NetworkChart} from 'replot-network'

Quick Start

replot-network is designed to create beautiful network charts right out of the box. The only required input is properly formatted data.

In the simplest case, just supply data and specify the keys for parents and childs of links:

render() {
    let trades = [
      {exporter: "Germany", importer: "European Union", volume: 1468990},
      {exporter: "Netherlands", importer: "European Union", volume: 798744},
      {exporter: "European Union", importer: "France", volume: 745931},
      ...
    ]

    return(
        <NetworkChart
            data={trades}
            parentKey="exporter"
            childKey="importer"
        />
    )
}

• data is the only required props
• parentKey defaults to "parent"
• childKey defaults to "child"

API

Dimensions

Dimensions may be specified by passing in width and height props with numbers, in the unit of pixels.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        width={600}
        height={450}
    />
  )
}

• width defaults to 800
• height defaults to 600

Width dimensions may also be specified with a string, as a percentage. The width will then be calculated as a proportion of the parent container.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        width="50%"
        height={450}
    />
  )
}

Default	width={600} height={450}	width="50%" height={450}

Link Styles

Link Color

Link color may be specified by passing in lineColor prop with a hex string.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        lineColor="#52b3d9"
    />
  )
}

• lineColor defaults to "#AAA"

Link Opacity

Link opacity may be specified by passing in lineOpacity prop with a number between 0 to 1.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        lineOpacity={1}
    />
  )
}

• lineOpacity defaults to 0.25

Link Width

Link width may be specified by passing in lineWidth prop with a number in the unit of pixels.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        lineWidth={5}
    />
  )
}

• lineWidth defaults to 1

lineColor="#52b3d9"	lineOpacity={1}	lineWidth={5}

Weighted Links

Link width may be weighted by setting the weightedLinks prop to true. Optionally, supply the linkKey prop with the key of link weights and/or to the minLineWidth and maxLineWidth props with the minimum and maximum link widths in the unit of pixels.

Weighted link widths will range between minLineWidth and maxLineWidth.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        weightedLinks={true}
        linkKey="volume"
        minLineWidth={1}
        maxLineWidth={20}
    />
  )
}

• weightedLinks defaults to false
• linkKey defaults to null
• minLineWidth defaults to 1
• maxLineWidth defaults to 10

If weightedLinks is true, but no linkKey is supplied, link width is weighted by how many times the same link appears in data.

Default	linkKey="volume"	linkKey="volume" maxLineWidth={20}

Node Color

Node color may be specified through 2 different mechanisms, both through a color prop. If none of the mechanisms are specified, NetworkChart defaults to a built-in color palette.

Group Color

Users can supply the nodes, nodeKey, and groupKey props to color nodes by groups. nodeKey is the key of node IDs and groupKey is the key of node groups.

render() {
  let nodes = [
    {region: "America", country: "Canada", exports: 402400},
    {region: "Europe", country: "Belgium", exports: 250800},
    {region: "Asia", country: "China", exports: 2011000},
    ...
  ]

  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        nodes={nodes}
        nodeKey="country"
        groupKey="region"
    />
  )
}

• nodes defaults to null
• nodeKey defaults to id
• groupKey defaults to null

Default	groupKey="region"

User-provided Color Palette

Users can specify a list of colors to use as a palette, passed to the color prop.

render() {
  let colors = ["#fea9ac", "#f46b72", "#caa56f", "#8ebc57"]

  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        nodes={nodes} nodeKey="country" groupKey="region"
        color={colors}
    />
  )
}

color={colors}	color={colors} groupKey="region"

User-provided Color function

When node and nodeKey are supplied, users can also specify a function to assign colors to different nodes. Expected argument to the function is the data for each node.

colorByExports(node) {
  if (node['exports'] > 1000000){
    return "red"
  } else {
    return "black"
  }
}

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        nodes={nodes} nodeKey="country"
        color={this.colorByExports}
    />
  )
}

Node Radius

Node radius may be specified by passing in nodeRadius prop with a number in the unit of pixels.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        nodeRadius={10}
    />
  )
}

• nodeRadius defaults to 5

Default	nodeRadius={10}

Weighted Nodes

Node radius may be weighted by supplying nodes, nodeKey, and nodeWeightKey props. nodeKey is the key of node IDs and nodeWeightKey is the key of node weights.

Optionally, supply the minRadius and maxRadius props with the minimum and maximum node radiuses in the unit of pixels. Weighted node radius will range between minRadius and maxRadius.

render() {
  let nodes = [
    {region: "America", country: "Canada", exports: 402400},
    {region: "Europe", country: "Belgium", exports: 250800},
    {region: "Asia", country: "China", exports: 2011000},
    ...
  ]

  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        nodes={nodes}
        nodeKey="country"
        nodeWeightKey="exports"
        minRadius={5}
        maxRadius={20}
    />
  )
}

• nodes defaults to null
• nodeKey defaults to id
• nodeWeightKey defaults to null
• minRadius defaults to 5
• maxRadius defaults to 10

Default	nodeWeightKey="exports"	nodeWeightKey="exports" maxRadius={20}

Node Labels

Node labels may be switched on by setting the showLabels prop to true.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        showLabels={true}
    />
  )
}

• showLabels defaults to false, true displays the labels

Node labels display their IDs by default when switched on.

Node Label Color

Node label color may be specified by passing in labelColor prop with a hex string.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        showLabels={true}
        labelColor="#52b3d9"
    />
  )
}

• labelColor defaults to "#AAA"

showLabels={true}	showLabels={true} labelColor="#52b3d9"

Node Label Font Size

Node label font size may be specified by passing in labelFontSize prop with a number.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        showLabels={true}
        labelFontSize={20}
    />
  )
}

• labelFontSize defaults to null

If labelFontSize is not specified, labels are displayed in medium fonts.

Node Label Font Family

Node label font family may be specified by passing in labelFontFamily prop with a string.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        showLabels={true}
        labelFontFamily="Courier"
    />
  )
}

• labelFontFamily defaults to null

If labelFontFamily is not specified, labels inherit font family.

labelFontSize={20}	labelFontFamily="Courier"

Optionally, supply the the nodes, nodeKey, and labelKey props to specify the label contents. nodeKey is the key of node IDs and groupKey is the key of node labels.

render() {
  let nodes = [
    {region: "America", country: "Canada", exports: 402400},
    {region: "Europe", country: "Belgium", exports: 250800},
    {region: "Asia", country: "China", exports: 2011000},
    ...
  ]

  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        showLabels={true}
        nodes={nodes}
        nodeKey="country"
        labelKey="region"
    />
  )
}

• nodes defaults to null
• nodeKey defaults to id
• labelKey defaults to null

Attraction Factor

Density of nodes may be specified by passing in attractionFactor prop with a number.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        attractionFactor={5}
    />
  )
}

• attractionFactor defaults to 1

Default	attractionFactors={5}

Tooltip

Tooltips can display more specific information about a data series.

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        tooltip={true}
        tooltipColor="light"
    />
  )
}

• tooltip defaults to true, false turns the tooltip off
• tooltipColor defaults to light, it can be set to light or dark
• tooltipContents defaults to data associated with the node (ID, group and weight if applicable)

Default (tooltipColor="light")	tooltipColor="dark"	tooltip={false}

User-provided Tooltip Function

Users can customize what is displayed inside the tooltip with a function. Expected arguments to the function are the title of the location and the data for the specific location hovered over. The function should return JSX.

fillTooltip(data){
  return(
    <div>
      <span>The data for this node looks like: {JSON.stringify(data)}</span>
    </div>
  )
}

render() {
  return(
    <NetworkChart
        data={trades} parentKey="exporter" childKey="importer"
        tooltip={true}
        tooltipColor="dark"
        tooltipContents={this.fillTooltip}
    />
  )
}

Animation

Users can control the initial animation of the network chart, nodes falling into their positions.

• animate defaults to true, false turns off the animation.