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By Johan van Soest.

Published : 2015-04-01.

Last updated : 2017-05-02.

Graph.js a JavaScript library for HTML 5

Nick Downie has created a great and free JavaScript library to easily produce interactive charts on your HTML 5 Canvas. Full documentation about and the free download of Chart.js can be found at http://chartjs.org/. Just a few simple examples are shown below. Hover on the graphs to see the tooltips.

Line Chart

The code:

<!-- ********************************************************************* -->
<!-- * This example demonstrates how to use the JavaScript Chart library * -->
<!-- * Chart.js (http://chartjs.org/) by Nick Downie                     * -->
<!-- * (C)Copyright 2015 - 2025 by J.P.G. van Soest.                     * -->
<!-- ********************************************************************* -->
<html>
  <head>
    <title>Chart.js Line Chart Example</title>
    <script src="Chart.js"></script>
    <script>
// Define the data set for the Line Chart
var dataLine = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [
        {
            label: "My First dataset",
            fillColor: "rgba(220,220,220,0.2)",
            strokeColor: "rgba(220,220,220,1)",
            pointColor: "rgba(220,220,220,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(220,220,220,1)",
            data: [65, 59, 80, 81, 56, 55, 40]
        },
        {
            label: "My Second dataset",
            fillColor: "rgba(151,187,205,0.2)",
            strokeColor: "rgba(151,187,205,1)",
            pointColor: "rgba(151,187,205,1)",
            pointStrokeColor: "#fff",
            pointHighlightFill: "#fff",
            pointHighlightStroke: "rgba(151,187,205,1)",
            data: [28, 48, 40, 19, 86, 27, 90]
        }
    ]
};

window.onload = function(){
	var ctxLine = document.getElementById("LineChart").getContext("2d");
	var myLineChart = new Chart(ctxLine).Line(dataLine);
};
</script>
  </head>
  <body>
    <center><img src="http://www.vansoest.it/v1/image/vansoest.gif" /></center>
    <h1>This Page shows how to setup a Line Chart</h1>
    <canvas id="LineChart" width="300" height="300">This place is reserved for a Line chart</canvas>
  </body>
</html>

Html formatting by http://tohtml.com/

Pie Chart

The code:

<!-- ********************************************************************* -->
<!-- * This example demonstrates how to use the JavaScript Chart library * -->
<!-- * Chart.js (http://chartjs.org/) by Nick Downie                     * -->
<!-- * (C)Copyright 2015 - 2025 by J.P.G. van Soest.                     * -->
<!-- ********************************************************************* -->
<html>
  <head>
    <title>Chart.js Pie Chart Example</title>
    <script src="Chart.js"></script>
    <script>
// Define the data set for the Pie Chart

var dataPie =  [
    {   
            value: 600,   
            color: "#F7464A",   
            highlight: "#FF5A5E",   
            label: "Monday"   
    },   
    {   
            value: 150,   
            color: "#46BFBD",   
            highlight: "#5AD3D1",   
            label: "Tuesday"   
    },   
    {   
            value: 100,   
            color: "#FDB45C",   
            highlight: "#FFC870",   
            label: "Wednesday"   
    },   
    {   
            value: 400,   
            color: "#949FB1",   
            highlight: "#A8B3C5",   
            label: "Thursday"   
    },   
    {   
            value: 120,   
            color: "#4D5360",   
            highlight: "#616774",   
            label: "Friday"   
    }   

]; 

window.onload = function(){
        var ctxPie = document.getElementById("PieChart").getContext("2d");
        var myPieChart = new Chart(ctxPie).Pie(dataPie);
};
</script>
  </head>
  <body>
    <center><img src="http://www.vansoest.it/v1/image/vansoest.gif" /></center>
    <h1>This Page shows how to setup a Pie Chart</h1>
    <canvas id="PieChart" width="300" height="300">This place is reserved for a Pie chart</canvas><br />
  </body>
</html>

Html formatting by http://tohtml.com/

Bar Chart

The code:

<!-- ********************************************************************* -->
<!-- * This example demonstrates how to use the JavaScript Chart library * -->
<!-- * Chart.js (http://chartjs.org/) by Nick Downie                     * -->
<!-- * (C)Copyright 2015 - 2025 by J.P.G. van Soest.                     * -->
<!-- ********************************************************************* -->
<html>
  <head>
    <title>Chart.js Bar Chart Example</title>
    <script src="Chart.js"></script>
    <script>
// Define the data set for the Bar Chart
var dataBar = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [
        {
            label: "My First dataset",
            fillColor: "rgba(220,220,220,0.5)",
            strokeColor: "rgba(220,220,220,0.8)",
            highlightFill: "rgba(220,220,220,0.75)",
            highlightStroke: "rgba(220,220,220,1)",
            data: [65, 59, 80, 81, 56, 55, 40]
        },
        {
            label: "My Second dataset",
            fillColor: "rgba(151,187,205,0.5)",
            strokeColor: "rgba(151,187,205,0.8)",
            highlightFill: "rgba(151,187,205,0.75)",
            highlightStroke: "rgba(151,187,205,1)",
            data: [28, 48, 40, 19, 86, 27, 90]
        }
    ]
};

window.onload = function(){
	var ctxBar = document.getElementById("BarChart").getContext("2d");
	var myBarChart = new Chart(ctxBar).Bar(dataBar);
};
</script>
  </head>
  <body>
    <center><img src="http://www.vansoest.it/v1/image/vansoest.gif" /></center>
    <h1>This Page shows how to setup a Bar Chart</h1>
    <canvas id="BarChart" width="300" height="300">This place is reserved for a Bar chart</canvas>
  </body>
</html>

Html formatting by http://tohtml.com/

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