1. Home

Chart.js

Chart.js is an free JavaScript library for making HTML-based charts.It is one of the simplest visualization libraries for JavaScript, and comes with the following built-in chart types

How to Use Chart.js?

Chart.js is easy to use.

First, add a link to the providing CDN (Content Delivery Network):
<script
src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.js">
</script>
Then, add a <canvas> to where you want to draw the chart:
<canvas id="myChart" style="width:100%;max-width:700px"></canvas>

The canvas element must have a unique id.

That's all!

Typical Scatter Chart Syntax:

var myChart = new Chart("myChart", {
  type: "scatter",
  data: {},
  options: {}
});

Typical Line Chart Syntax:

var myChart = new Chart("myChart", {
  type: "line",
  data: {},
  options: {}
});

Typical Bar Chart Syntax:

var myChart = new Chart("myChart", {
  type: "bar",
  data: {},
  options: {}
});

Scatter Plots

House Prices vs. Size

new Chart("myPlot11", { type: 'scatter', data: { datasets: [{ pointRadius:4, backgroundColor:"rgba(0,0,255,1)", data:[ {x:50, y:7}, {x:60, y:8}, {x:70, y:8}, {x:80, y:9}, {x:90, y:9}, {x:100, y:9}, {x:110, y:10}, {x:120, y:11}, {x:130, y:14}, {x:140, y:14}, {x:150, y:15} ] }] }, options: { legend: {display: false}, scales: { xAxes: [{ticks: {min: 40, max:160}}], yAxes: [{ticks: {min: 6, max:16}}], } } });

Source Code

var xyValues = [
  {x:50, y:7},
  {x:60, y:8},
  {x:70, y:8},
  {x:80, y:9},
  {x:90, y:9},
  {x:100, y:9},
  {x:110, y:10},
  {x:120, y:11},
  {x:130, y:14},
  {x:140, y:14},
  {x:150, y:15}
];

new Chart("myChart", {
  type: "scatter",
  data: {
    datasets: [{
      pointRadius: 4,
      pointBackgroundColor: "rgba(0,0,255,1)",
      data: xyValues
    }]
  },
  options:{...}
});

Try it Yourself »

Line Graphs

House Prices vs. Size

new Chart("myPlot12", { type: 'line', data: { labels: [50,60,70,80,90,100,110,120,130,140,150], datasets: [{ fill:false, lineTension: 0, backgroundColor:"rgba(0,0,0,1)", borderColor: "rgba(0,0,0,0.2)", data: [7,8,8,9,9,9,10,11,14,14,15] }] }, options: { legend: {display: false}, scales: { yAxes: [{ticks: {min: 6, max:16}}], } } });

Source Code

var xValues = [50,60,70,80,90,100,110,120,130,140,150];
var yValues = [7,8,8,9,9,9,10,11,14,14,15];

new Chart("myChart", {
  type: "line",
  data: {
    labels: xValues,
    datasets: [{
      backgroundColor: "rgba(0,0,0,1.0)",
      borderColor: "rgba(0,0,0,0.1)",
      data: yValues
    }]
  },
  options:{...}
});

Try it Yourself »

If you set the borderColor to zero, you can scatter plot the line graph:

borderColor: "rgba(0,0,0,0)",

Try it Yourself »

Multiple Lines

var xValues = [100,200,300,400,500,600,700,800,900,1000]; new Chart("myChart13", { type: "line", data: { labels: xValues, datasets: [{ data: [860,1140,1060,1060,1070,1110,1330,2210,7830,2478], borderColor: "red", fill: false }, { data: [1600,1700,1700,1900,2000,2700,4000,5000,6000,7000], borderColor: "green", fill: false }, { data: [300,700,2000,5000,6000,4000,2000,1000,200,100], borderColor: "blue", fill: false }] }, options: { legend: {display: false} } });

Source Code

var xValues = [100,200,300,400,500,600,700,800,900,1000];

new Chart("myChart", {
  type: "line",
  data: {
    labels: xValues,
    datasets: [{
      data: [860,1140,1060,1060,1070,1110,1330,2210,7830,2478],
      borderColor: "red",
      fill: false
    },{
      data: [1600,1700,1700,1900,2000,2700,4000,5000,6000,7000],
      borderColor: "green",
      fill: false
    },{
      data: [300,700,2000,5000,6000,4000,2000,1000,200,100],
      borderColor: "blue",
      fill: false
    }]
  },
  options: {
    legend: {display: false}
  }
});

Try it Yourself »

Linear Graphs

var xValues = []; var yValues = []; generateData("x * 2 + 7", 0, 10, 0.5); new Chart("myFunc1", { type: "line", data: { labels: xValues, datasets: [{ fill: false, pointRadius: 1, borderColor: "rgba(255,0,0,0.5)", data: yValues }] }, options: { legend: {display: false}, title: { display: true, text: "y = x * 2 + 7", fontSize: 16 } } }); function generateData(value, i1, i2, step = 1) { for (let x = i1; x <= i2; x += step) { yValues.push(eval(value)); xValues.push(x); } }

Source Code

var xValues = [];
var yValues = [];
generateData("x * 2 + 7", 0, 10, 0.5);

new Chart("myChart", {
  type: "line",
  data: {
    labels: xValues,
    datasets: [{
      fill: false,
      pointRadius: 1,
      borderColor: "rgba(255,0,0,0.5)",
      data: yValues
    }]
  },
  options: {...}
});

function generateData(value, i1, i2, step = 1) {
  for (let x = i1; x <= i2; x += step) {
    yValues.push(eval(value));
    xValues.push(x);
  }
}

Try it Yourself »

Function Graphs

var xValues = []; var yValues = []; generateData("Math.sin(x)", 0, 10, 0.5); new Chart("myFunc2", { type: "line", data: { labels: xValues, datasets: [{ fill: false, pointRadius: 2, borderColor: "rgba(0,0,255,0.5)", data: yValues }] }, options: { legend: {display: false}, title: { display: true, text: "y = x * 2 + 7", fontSize: 16 } } }); function generateData(value, i1, i2, step = 1) { for (let x = i1; x <= i2; x += step) { yValues.push(eval(value)); xValues.push(x); } }

Same as Linear Graph. Just change the generateData parameter(s):

generateData("Math.sin(x)", 0, 10, 0.5);

Try it Yourself »

Bar Charts

var chart13 = new Chart("myPlot13", { type: 'bar', data: { labels: ["Italy","France","Spain","USA","Argentina"], datasets: [{ backgroundColor:["red", "green","blue","orange","brown"], data: [55, 49, 44, 24, 15] }] }, options: { legend: {display: false}, scales: { yAxes: [{ ticks: { beginAtZero: true } }] }, title: { display: true, text: "World Wide Wine Production 2018", fontSize: 16 } } });

Source Code

var xValues = ["Italy", "France", "Spain", "USA", "Argentina"];
var yValues = [55, 49, 44, 24, 15];
var barColors = ["red", "green","blue","orange","brown"];

new Chart("myChart", {
  type: "bar",
  data: {
    labels: xValues,
    datasets: [{
      backgroundColor: barColors,
      data: yValues
    }]
  },
  options: {...}
});

Try it Yourself »

Color only one bar:

var barColors = ["blue"];

Try it Yourself »

Same color all bars:

var barColors ="red";

Try it Yourself »

Color Shades:

var barColors = [
  "rgba(0,0,255,1.0)",
  "rgba(0,0,255,0.8)",
  "rgba(0,0,255,0.6)",
  "rgba(0,0,255,0.4)",
  "rgba(0,0,255,0.2)",
];

Try it Yourself »

Horizontal Bars

Just change type from "bar" to "horizontalBar":

type: "horizontalBar",

Try it Yourself »

Pie Charts

var xValues = ["Italy", "France", "Spain", "USA", "Argentina"]; var yValues = [55, 49, 44, 24, 15]; var barColors = [ "#b91d47", "#00aba9", "#2b5797", "#e8c3b9", "#1e7145" ]; var chart = new Chart("myPlot14", { type: "pie", data: { labels: xValues, datasets: [{ backgroundColor: barColors, data: yValues }] }, options: { title: { display: true, text: "World Wide Wine Production 2018" } } });

Example

new Chart("myChart", {
  type: "pie",
  data: {
    labels: xValues,
    datasets: [{
      backgroundColor: barColors,
      data: yValues
    }]
  },
  options: {
    title: {
      display: true,
      text: "World Wide Wine Production"
    }
  }
});

Try it Yourself »

Doughnut Charts

var ctx = document.getElementById("myPlot15").getContext("2d"); var xValues = ["Italy", "France", "Spain", "USA", "Argentina"]; var yValues = [55, 49, 44, 24, 15]; var barColors = [ "#b91d47", "#00aba9", "#2b5797", "#e8c3b9", "#1e7145" ]; var chart = new Chart(ctx, { type: "doughnut", data: { labels: xValues, datasets: [{ backgroundColor: barColors, data: yValues }] }, options: { title: { display: true, text: "World Wide Wine Production 2018" } } });

Just change type from "pie" to "doughnut":

type: "doughnut";

Try it Yourself »

Categories

HTML CSS3 Bootstrap Foundation Sass JavaScript TypeScript JQuery AngularJS React NodeJS Highcharts PHP Python Python3 Django Linux Docker Ruby Java C C ++ Perl Servlet JSP Lua Scala Go ASP C # SQL MySQL SQLite MongoDB Redis Android Swift ionic Kotlin XML tutorial

Contact US