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CHart.JS Image javascript library logo

NPM VERSION

Libraries.io dependency status for GitHub repo Code Climate maintainability

Snyk Vulnerabilities for npm package

Generate Chart.JS charts as image and embed them everywhere in emails, pdf reports, chat bots...!

Getting started

1. Install Chart.JS Image npm Package

npm install chart.js-image --save

2. Import Chart.JS Image

CommonJS

const ChartJSImage = require('chart.js-image');

ES6

import ChartJSImage from 'chart.js-image';

3. Generate a chart image

const line_chart = ChartJSImage().chart({
  "type": "line",
  "data": {
    "labels": [
      "January",
      "February",
      "March",
      "April",
      "May",
      "June",
      "July"
    ],
    "datasets": [
      {
        "label": "My First dataset",
        "borderColor": "rgb(255,+99,+132)",
        "backgroundColor": "rgba(255,+99,+132,+.5)",
        "data": [
          57,
          90,
          11,
          -15,
          37,
          -37,
          -27
        ]
      },
      {
        "label": "My Second dataset",
        "borderColor": "rgb(54,+162,+235)",
        "backgroundColor": "rgba(54,+162,+235,+.5)",
        "data": [
          71,
          -36,
          -94,
          78,
          98,
          65,
          -61
        ]
      },
      {
        "label": "My Third dataset",
        "borderColor": "rgb(75,+192,+192)",
        "backgroundColor": "rgba(75,+192,+192,+.5)",
        "data": [
          48,
          -64,
          -61,
          98,
          0,
          -39,
          -70
        ]
      },
      {
        "label": "My Fourth dataset",
        "borderColor": "rgb(255,+205,+86)",
        "backgroundColor": "rgba(255,+205,+86,+.5)",
        "data": [
          -58,
          88,
          29,
          44,
          3,
          78,
          -9
        ]
      }
    ]
  },
  "options": {
    "title": {
      "display": true,
      "text": "Chart.js Line Chart"
    },
    "scales": {
      "xAxes": [
        {
          "scaleLabel": {
            "display": true,
            "labelString": "Month"
          }
        }
      ],
      "yAxes": [
        {
          "stacked": true,
          "scaleLabel": {
            "display": true,
            "labelString": "Value"
          }
        }
      ]
    }
  }
}) // Line chart
.backgroundColor('white')
.width(500) // 500px
.height(300); // 300px

line_chart.toURL(); // String: https://image-charts.com/chart.js/2.8.0?icac=documentation&chart=%7Btype%3A%27line%27%2Cdata%3A%7Blabels%3A%5B%27January%27%2C%27February%27%2C%27March%27%2C%27April%27%2C%27May%27%2C%27June%27%2C%27July%27%5D%2Cdatasets%3A%5B%7Blabel%3A%27My+First+dataset%27%2CborderColor%3A%27rgb%28255%2C+99%2C+132%29%27%2CbackgroundColor%3A%27rgba%28255%2C+99%2C+132%2C+.5%29%27%2Cdata%3A%5B57%2C90%2C11%2C-15%2C37%2C-37%2C-27%5D%7D%2C%7Blabel%3A%27My+Second+dataset%27%2CborderColor%3A%27rgb%2854%2C+162%2C+235%29%27%2CbackgroundColor%3A%27rgba%2854%2C+162%2C+235%2C+.5%29%27%2Cdata%3A%5B71%2C-36%2C-94%2C78%2C98%2C65%2C-61%5D%7D%2C%7Blabel%3A%27My+Third+dataset%27%2CborderColor%3A%27rgb%2875%2C+192%2C+192%29%27%2CbackgroundColor%3A%27rgba%2875%2C+192%2C+192%2C+.5%29%27%2Cdata%3A%5B48%2C-64%2C-61%2C98%2C0%2C-39%2C-70%5D%7D%2C%7Blabel%3A%27My+Third+dataset%27%2CborderColor%3A%27rgb%28255%2C+205%2C+86%29%27%2CbackgroundColor%3A%27rgba%28255%2C+205%2C+86%2C+.5%29%27%2Cdata%3A%5B-58%2C88%2C29%2C44%2C3%2C78%2C-9%5D%7D%5D%7D%2Coptions%3A%7Bresponsive%3Atrue%2Ctitle%3A%7Bdisplay%3Atrue%2Ctext%3A%27Chart.js+Line+Chart+-+Stacked+Area%27%7D%2Ctooltips%3A%7Bmode%3A%27index%27%7D%2Chover%3A%7Bmode%3A%27index%27%7D%2Cscales%3A%7BxAxes%3A%5B%7BscaleLabel%3A%7Bdisplay%3Atrue%2ClabelString%3A%27Month%27%7D%7D%5D%2CyAxes%3A%5B%7Bstacked%3Atrue%2CscaleLabel%3A%7Bdisplay%3Atrue%2ClabelString%3A%27Value%27%7D%7D%5D%7D%7D%7D&bkg=white&width=700&height=390&icretina=1&ichm=922e17b749b1ab7fab2a14cb742029dc46e50e658457913a9f548793910d2a0d
line_chart.toFile('/path/to/chart.png'); // Promise<()>
line_chart.toDataURI(); // Promise<String> : data:image/png;base64,iVBORw0KGgo...
line_chart.toBuffer(); // Promise<Buffer> : Buffer 89 50 4e 47 0d 0a 1a 0a 00 00 00 ...

Table of Contents

Constructor

Create an instance, the argument within [ ] is optional. See usage

ChartJSImage( [ Object opt ] )
// or
new ChartJSImage( [ Object opt ] )

Options

Default options are listed below.

opt = {
    /*
     * Request timeout (in millisecond) when calling toBuffer() or toDataURI()
     */
    timeout: 5000,

    /*
     * (Enterprise and Enterprise+ subscription only) SECRET_KEY
     */
    secret: null,

    /*
     * (Enterprise, Enterprise+ and On-Premise subscription only) custom domain
     */
    host: 'image-charts.com',

    /*
     * (On-Premise subscription only) custom protocol
     */
    protocol: 'https',

    /*
     * (On-Premise subscription only) custom port
     */
    port: 443,

    /*
     * (On-Premise subscription only) custom pathname
     */
    pathname: '/chart.js/2.8.0'
}

Methods

toURL() : String

Get the full Image-Charts API url (signed and encoded if necessary)

Usage
// import ChartJSImage from 'chart.js-image';
const ChartJSImage = require('..');

const chart_url = ChartJSImage()
.chart({
type: 'bar',
data: { labels: ['Hello world', 'Foo bar'], datasets: [{ label: 'Foo', data: [1, 2] }] },
}) // vertical bar chart
.width(300) // 300px
.height(300) // 300px
.toURL(); // get the generated URL

console.log(chart_url); // https://image-charts.com/chart?cht=bvg&chs=300x300&chd=a%3A60%2C40

toFile(file) : Promise<()>

Creates a file containing generated chart image and yield a promise.

When file is a filename, asynchronously writes data to the file, replacing the file if it already exists. When file is a file descriptor, the behavior is similar to calling fs.write() directly (which is recommended).

Usage
//import ChartJSImage from 'chart.js-image';
const ChartJSImage = require('..');

const chart_path = '/tmp/chart.png';

ChartJSImage()
.chart({
  "type": "radar",
  "data": {
    "labels": [
      "January",
      "February",
      "March",
      "April",
      "May",
      "June",
      "July",
      "August"
    ],
    "datasets": [
      {
        "backgroundColor": "rgba(255, 99, 132, 0.5)",
        "borderColor": "rgb(255, 99, 132)",
        "data": [
          15.09,
          15.67,
          12.5,
          12.77,
          13.62,
          13.68,
          13.93,
          15.95
        ],
        "label": "D0"
      },
      {
        "backgroundColor": "rgba(255, 159, 64, 0.5)",
        "borderColor": "rgb(255, 159, 64)",
        "data": [
          24.55,
          28.91,
          21.81,
          23.27,
          26.98,
          26.05,
          25.39,
          24.92
        ],
        "label": "D1",
        "fill": "-1"
      },
      {
        "backgroundColor": "rgba(255, 205, 86, 0.5)",
        "borderColor": "rgb(255, 205, 86)",
        "data": [
          36.35,
          43.93,
          32.54,
          33.54,
          42.82,
          39.34,
          35.84,
          33.5
        ],
        "label": "D2",
        "fill": 1
      },
      {
        "backgroundColor": "rgba(75, 192, 192, 0.5)",
        "borderColor": "rgb(75, 192, 192)",
        "data": [
          47.7,
          58.92,
          44.45,
          49.08,
          53.39,
          51.85,
          48.4,
          49.36
        ],
        "label": "D3",
        "fill": false
      },
      {
        "backgroundColor": "rgba(54, 162, 235, 0.5)",
        "borderColor": "rgb(54, 162, 235)",
        "data": [
          60.73,
          71.97,
          53.96,
          57.22,
          65.09,
          62.06,
          56.91,
          60.52
        ],
        "label": "D4",
        "fill": "-1"
      },
      {
        "backgroundColor": "rgba(153, 102, 255, 0.5)",
        "borderColor": "rgb(153, 102, 255)",
        "data": [
          73.33,
          80.78,
          68.05,
          68.59,
          76.79,
          77.24,
          66.08,
          72.37
        ],
        "label": "D5",
        "fill": "-1"
      }
    ]
  },
  "options": {
    "maintainAspectRatio": true,
    "spanGaps": false,
    "elements": {
      "line": {
        "tension": 0.000001
      }
    },
    "plugins": {
      "filler": {
        "propagate": false
      },
      "samples-filler-analyser": {
        "target": "chart-analyser"
      }
    }
  }
})
.bkg('white')
.width(700)
.height(390)
.toFile(chart_path)
.then(() => console.log('Image chart written at %s', chart_path))

toBuffer() : Promise<Buffer>

Do a request to Image-Charts API with current configuration and yield a promise of a NodeJS buffer

Usage
//import ChartJSImage from 'chart.js-image';
const ChartJSImage = require('..');

const buffer = ChartJSImage()
.chart({
  "type": "radar",
  "data": {
    "labels": [
      "January",
      "February",
      "March",
      "April",
      "May",
      "June",
      "July",
      "August"
    ],
    "datasets": [
      {
        "backgroundColor": "rgba(255, 99, 132, 0.5)",
        "borderColor": "rgb(255, 99, 132)",
        "data": [
          15.09,
          15.67,
          12.5,
          12.77,
          13.62,
          13.68,
          13.93,
          15.95
        ],
        "label": "D0"
      },
      {
        "backgroundColor": "rgba(255, 159, 64, 0.5)",
        "borderColor": "rgb(255, 159, 64)",
        "data": [
          24.55,
          28.91,
          21.81,
          23.27,
          26.98,
          26.05,
          25.39,
          24.92
        ],
        "label": "D1",
        "fill": "-1"
      },
      {
        "backgroundColor": "rgba(255, 205, 86, 0.5)",
        "borderColor": "rgb(255, 205, 86)",
        "data": [
          36.35,
          43.93,
          32.54,
          33.54,
          42.82,
          39.34,
          35.84,
          33.5
        ],
        "label": "D2",
        "fill": 1
      },
      {
        "backgroundColor": "rgba(75, 192, 192, 0.5)",
        "borderColor": "rgb(75, 192, 192)",
        "data": [
          47.7,
          58.92,
          44.45,
          49.08,
          53.39,
          51.85,
          48.4,
          49.36
        ],
        "label": "D3",
        "fill": false
      },
      {
        "backgroundColor": "rgba(54, 162, 235, 0.5)",
        "borderColor": "rgb(54, 162, 235)",
        "data": [
          60.73,
          71.97,
          53.96,
          57.22,
          65.09,
          62.06,
          56.91,
          60.52
        ],
        "label": "D4",
        "fill": "-1"
      },
      {
        "backgroundColor": "rgba(153, 102, 255, 0.5)",
        "borderColor": "rgb(153, 102, 255)",
        "data": [
          73.33,
          80.78,
          68.05,
          68.59,
          76.79,
          77.24,
          66.08,
          72.37
        ],
        "label": "D5",
        "fill": "-1"
      }
    ]
  },
  "options": {
    "maintainAspectRatio": true,
    "spanGaps": false,
    "elements": {
      "line": {
        "tension": 0.000001
      }
    },
    "plugins": {
      "filler": {
        "propagate": false
      },
      "samples-filler-analyser": {
        "target": "chart-analyser"
      }
    }
  }
})
.bkg('white')
.width(700)
.height(390)
.toBuffer() // download chart image as a buffer
.then((buffer) => console.log(buffer)) // <Buffer 89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 5

toDataURI() : String

Do a request to Image-Charts API with current configuration and yield a promise of a base64 encoded data URI

Usage
//import ChartJSImage from 'chart.js-image';
const ChartJSImage = require('..');

const chart_url = ChartJSImage()
.chart({
  "type": "radar",
  "data": {
    "labels": [
      "January",
      "February",
      "March",
      "April",
      "May",
      "June",
      "July",
      "August"
    ],
    "datasets": [
      {
        "backgroundColor": "rgba(255, 99, 132, 0.5)",
        "borderColor": "rgb(255, 99, 132)",
        "data": [
          15.09,
          15.67,
          12.5,
          12.77,
          13.62,
          13.68,
          13.93,
          15.95
        ],
        "label": "D0"
      },
      {
        "backgroundColor": "rgba(255, 159, 64, 0.5)",
        "borderColor": "rgb(255, 159, 64)",
        "data": [
          24.55,
          28.91,
          21.81,
          23.27,
          26.98,
          26.05,
          25.39,
          24.92
        ],
        "label": "D1",
        "fill": "-1"
      },
      {
        "backgroundColor": "rgba(255, 205, 86, 0.5)",
        "borderColor": "rgb(255, 205, 86)",
        "data": [
          36.35,
          43.93,
          32.54,
          33.54,
          42.82,
          39.34,
          35.84,
          33.5
        ],
        "label": "D2",
        "fill": 1
      },
      {
        "backgroundColor": "rgba(75, 192, 192, 0.5)",
        "borderColor": "rgb(75, 192, 192)",
        "data": [
          47.7,
          58.92,
          44.45,
          49.08,
          53.39,
          51.85,
          48.4,
          49.36
        ],
        "label": "D3",
        "fill": false
      },
      {
        "backgroundColor": "rgba(54, 162, 235, 0.5)",
        "borderColor": "rgb(54, 162, 235)",
        "data": [
          60.73,
          71.97,
          53.96,
          57.22,
          65.09,
          62.06,
          56.91,
          60.52
        ],
        "label": "D4",
        "fill": "-1"
      },
      {
        "backgroundColor": "rgba(153, 102, 255, 0.5)",
        "borderColor": "rgb(153, 102, 255)",
        "data": [
          73.33,
          80.78,
          68.05,
          68.59,
          76.79,
          77.24,
          66.08,
          72.37
        ],
        "label": "D5",
        "fill": "-1"
      }
    ]
  },
  "options": {
    "maintainAspectRatio": true,
    "spanGaps": false,
    "elements": {
      "line": {
        "tension": 0.000001
      }
    },
    "plugins": {
      "filler": {
        "propagate": false
      },
      "samples-filler-analyser": {
        "target": "chart-analyser"
      }
    }
  }
})
.bkg('white')
.width(700)
.height(390)
.toDataURI() // download chart image and generate a data URI string
.then(chart_url => console.log(chart_url)); // "data:image/png;base64,iVBORw0KGgoAAAANSUhE"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

Enterprise Support

Image-Charts Enterprise and Enterprise+ subscriptions remove the watermark and enable advanced features like custom-domain, high-resolution charts, custom fonts, multiple axis and mixed charts.

Usage

Once subscribed to a plan you will receive an ACCOUNT_ID and a SECRET_KEY. These two parameters are mandatory to sign your request and remove the watermark. Replace both values in the code example below:

//import ChartJSImage from 'chart.js-image';
const ChartJSImage = require('..');

const chart_url = ChartJSImage({secret: process.env.SECRET_KEY ||  'SECRET_KEY'})
.icac(process.env.ACCOUNT_ID || 'ACCOUNT_ID')
.chart({
  type: 'line',
  data: {
    labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
    datasets: [
      {
        label: 'My First dataset',
        borderColor: 'rgb(255, 99, 132)',
        backgroundColor: 'rgba(255, 99, 132, .5)',
        data: [57, 90, 11, -15, 37, -37, -27],
      },
      {
        label: 'My Second dataset',
        borderColor: 'rgb(54, 162, 235)',
        backgroundColor: 'rgba(54, 162, 235, .5)',
        data: [71, -36, -94, 78, 98, 65, -61],
      },
      {
        label: 'My Third dataset',
        borderColor: 'rgb(75, 192, 192)',
        backgroundColor: 'rgba(75, 192, 192, .5)',
        data: [48, -64, -61, 98, 0, -39, -70],
      },
      {
        label: 'My Third dataset',
        borderColor: 'rgb(255, 205, 86)',
        backgroundColor: 'rgba(255, 205, 86, .5)',
        data: [-58, 88, 29, 44, 3, 78, -9],
      },
    ],
  },
  options: {
    responsive: true,
    title: {
      display: true,
      text: 'Chart.js Line Chart - Stacked Area',
    },
    tooltips: {
      mode: 'index',
    },
    hover: {
      mode: 'index',
    },
    scales: {
      xAxes: [
        {
          scaleLabel: {
            display: true,
            labelString: 'Month',
          },
        },
      ],
      yAxes: [
        {
          stacked: true,
          scaleLabel: {
            display: true,
            labelString: 'Value',
          },
        },
      ],
    },
  },
})
.bkg('white')
.width(700)
.height(390)
.icretina('1') // enable paid-only features like high-resolution charts
.toURL(); // get the whole (HMAC signed) URL

console.log(chart_url);
// https://image-charts.com/chart.js/2.8.0?icac=documentation&chart=%7Btype%3A%27line%27%2Cdata%3A%7Blabels%3A%5B%27January%27%2C%27February%27%2C%27March%27%2C%27April%27%2C%27May%27%2C%27June%27%2C%27July%27%5D%2Cdatasets%3A%5B%7Blabel%3A%27My+First+dataset%27%2CborderColor%3A%27rgb%28255%2C+99%2C+132%29%27%2CbackgroundColor%3A%27rgba%28255%2C+99%2C+132%2C+.5%29%27%2Cdata%3A%5B57%2C90%2C11%2C-15%2C37%2C-37%2C-27%5D%7D%2C%7Blabel%3A%27My+Second+dataset%27%2CborderColor%3A%27rgb%2854%2C+162%2C+235%29%27%2CbackgroundColor%3A%27rgba%2854%2C+162%2C+235%2C+.5%29%27%2Cdata%3A%5B71%2C-36%2C-94%2C78%2C98%2C65%2C-61%5D%7D%2C%7Blabel%3A%27My+Third+dataset%27%2CborderColor%3A%27rgb%2875%2C+192%2C+192%29%27%2CbackgroundColor%3A%27rgba%2875%2C+192%2C+192%2C+.5%29%27%2Cdata%3A%5B48%2C-64%2C-61%2C98%2C0%2C-39%2C-70%5D%7D%2C%7Blabel%3A%27My+Third+dataset%27%2CborderColor%3A%27rgb%28255%2C+205%2C+86%29%27%2CbackgroundColor%3A%27rgba%28255%2C+205%2C+86%2C+.5%29%27%2Cdata%3A%5B-58%2C88%2C29%2C44%2C3%2C78%2C-9%5D%7D%5D%7D%2Coptions%3A%7Bresponsive%3Atrue%2Ctitle%3A%7Bdisplay%3Atrue%2Ctext%3A%27Chart.js+Line+Chart+-+Stacked+Area%27%7D%2Ctooltips%3A%7Bmode%3A%27index%27%7D%2Chover%3A%7Bmode%3A%27index%27%7D%2Cscales%3A%7BxAxes%3A%5B%7BscaleLabel%3A%7Bdisplay%3Atrue%2ClabelString%3A%27Month%27%7D%7D%5D%2CyAxes%3A%5B%7Bstacked%3Atrue%2CscaleLabel%3A%7Bdisplay%3Atrue%2ClabelString%3A%27Value%27%7D%7D%5D%7D%7D%7D&bkg=white&width=700&height=390&icretina=1&ichm=922e17b749b1ab7fab2a14cb742029dc46e50e658457913a9f548793910d2a0d

On-Premise Support

Image-Charts virtual appliance can be deployed anywhere inside a customer network.

import ChartJSImage from 'chart.js-image';

const chart_url = ChartJSImage({
        secret: 'SECRET_KEY',

        // override the host with your own endpoint
        host: 'custom-domain.tld'
    })
    .chart({/* chart.js configuration object */})
    .icretina('1') // enable paid-only features like high-resolution charts
    .toURL(); // get the whole (HMAC signed) URL

console.log(chart_url);
// https://image-charts.com/chart.js/2.8.0?icac=documentation&chart=%7Btype%3A%27line%27%2Cdata%3A%7Blabels%3A%5B%27January%27%2C%27February%27%2C%27March%27%2C%27April%27%2C%27May%27%2C%27June%27%2C%27July%27%5D%2Cdatasets%3A%5B%7Blabel%3A%27Unfilled%27%2Cfill%3Afalse%2CbackgroundColor%3A%27rgb%2854%2C+162%2C+235%29%27%2CborderColor%3A%27rgb%2854%2C+162%2C+235%29%27%2Cdata%3A%5B-73%2C40%2C-4%2C27%2C26%2C53%2C-12%5D%7D%2C%7Blabel%3A%27Dashed%27%2Cfill%3Afalse%2CbackgroundColor%3A%27rgb%2875%2C+192%2C+192%29%27%2CborderColor%3A%27rgb%2875%2C+192%2C+192%29%27%2CborderDash%3A%5B5%2C5%5D%2Cdata%3A%5B99%2C-40%2C93%2C-56%2C0%2C25%2C45%5D%7D%2C%7Blabel%3A%27Filled%27%2CbackgroundColor%3A%27rgb%28255%2C+99%2C+132%29%27%2CborderColor%3A%27rgb%28255%2C+99%2C+132%29%27%2Cdata%3A%5B56%2C68%2C84%2C11%2C-96%2C-56%2C-51%5D%2Cfill%3Atrue%7D%5D%7D%2Coptions%3A%7Btitle%3A%7Bdisplay%3Atrue%2Ctext%3A%27Chart.js+Line+Chart%27%7D%2Cscales%3A%7BxAxes%3A%5B%7Bdisplay%3Atrue%2CscaleLabel%3A%7Bdisplay%3Atrue%2ClabelString%3A%27Month%27%7D%7D%5D%2CyAxes%3A%5B%7Bdisplay%3Atrue%2CscaleLabel%3A%7Bdisplay%3Atrue%2ClabelString%3A%27Value%27%7D%7D%5D%7D%7D%7D&bkg=white&width=700&height=390&icretina=1&ichm=f272aa90e5ec691d41ac6c6c541f9d114c09dd38a1c7f114745c00074da72f69

c( value ) : ChartJSImage

Javascript/JSON definition of the chart. Use a Chart.js configuration object.

Usage

.c("{type:'bar',data:{labels:['Q1','Q2','Q3','Q4'],datasets:[{label:'Users',data:[50,60,70,180]},{label:'Revenue',data:[100,200,300,400]}]}}")

chart( value ) : ChartJSImage

Javascript/JSON definition of the chart. Use a Chart.js configuration object.

Usage

.chart("{type:'bar',data:{labels:['Q1','Q2','Q3','Q4'],datasets:[{label:'Users',data:[50,60,70,180]},{label:'Revenue',data:[100,200,300,400]}]}}")

width( value ) : ChartJSImage

Width of the chart

Usage

.width("400")

height( value ) : ChartJSImage

Height of the chart

Usage

.height("300")

backgroundColor( value ) : ChartJSImage

Background of the chart canvas. Accepts rgb (rgb(255,255,120)), colors (red), and url-encoded hex values (%23ff00ff). Abbreviated as "bkg"

Usage

.backgroundColor("black")
.backgroundColor("rgb(255,255,120)")
 
.backgroundColor("%23ff00ff")

bkg( value ) : ChartJSImage

Background of the chart canvas. Accepts rgb (rgb(255,255,120)), colors (red), and url-encoded hex values (%23ff00ff). Abbreviated as "bkg"

Usage

.bkg("black")
.bkg("rgb(255,255,120)")
 
.bkg("%23ff00ff")

encoding( value ) : ChartJSImage

Encoding of your "chart" parameter. Accepted values are url and base64.

Allowed values:

.encoding("url")
.encoding("base64")

icac( value ) : ChartJSImage

image-charts enterprise account_id

Reference

Usage

.icac("accountId")

ichm( value ) : ChartJSImage

HMAC-SHA256 signature required to activate paid features

Reference

Usage

.ichm("0785cf22a0381c2e0239e27c126de4181f501d117c2c81745611e9db928b0376")

icretina( value ) : ChartJSImage

retina mode

Reference

Allowed values:

.icretina("0")
.icretina("1")

About

Render Chart.JS chart as image

documentation.image-charts.com/chart.js/

Topics

chartjs chartjs-node chartjs-image chartjs-api

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