Client Side Chart Widget in HTML5: Part 5 (Polar Area Chart)

Introduction

I hope you have read my first two articles in this series that explains the loading of a Bar Chart, Pie Chart and Doughnut Chart. Please see the following links.

Now we will explain a client-side Doughnut Chart widget in HTML5.

Background

Please download the necessary files here http://www.chartjs.org/.

Using the code

A simple HTML

  1. <!DOCTYPE html>
  2. <html xmlns=“http://www.w3.org/1999/xhtml”>
  3.    <head>
  4.        <title> Polar Area Chart Using Chart.js</title>
  5.    </head>
  6.    <body></body>
  7. </html>

Included JavaScript file

  1. <script src=“Chart.js”></script>

Call the Chart Function

  1. window.onload = function () {
  2.             var canvasObject = document.getElementById(“myChart”).getContext(“2d”);
  3.             window.myPolarArea = new Chart(canvasObject).PolarArea(polarChartData, {
  4.                 responsive: true
  5.             });
  6.         }

Here we are loading the chart in the myChart.

As you can see in the preceding code, polarChartData is the data we will load into the chart.

  1. var polarChartData = [
  2.     {
  3.         value: 200,
  4.         color: “#F7464A”,
  5.         highlight: “#FF5A5E”,
  6.         label: “Monday”
  7.     },
  8.     {
  9.         value: 50,
  10.         color: “#46BFBD”,
  11.         highlight: “#5AD3D1”,
  12.         label: “Tuesday”
  13.     },
  14.     {
  15.         value: 150,
  16.         color: “#FDB45C”,
  17.         highlight: “#FFC870”,
  18.         label: “Wednesday”
  19.     },
  20.     {
  21.         value: 20,
  22.         color: “#949FB1”,
  23.         highlight: “#A8B3C5”,
  24.         label: “Saturday”
  25.     },
  26.     {
  27.         value: 400,
  28.         color: “#4D5360”,
  29.         highlight: “#616774”,
  30.         label: “Sunday”
  31.     }
  32.                  ];

Properties

  • value
  • color
  • highlight
  • label

Here you can change the properties as you want.

Complete HTML

  1. <!DOCTYPE html>
  2. <html xmlns=“http://www.w3.org/1999/xhtml”>
  3. <head>
  4.     <title>Doughnut Chart Using Chart.js</title>
  5.     <script src=“Chart.js”></script>
  6.     <script>
  7.         var polarChartData = [
  8.                 {
  9.                     value: 200,
  10.                     color: “#F7464A”,
  11.                     highlight: “#FF5A5E”,
  12.                     label: “Monday”
  13.                 },
  14.                 {
  15.                     value: 50,
  16.                     color: “#46BFBD”,
  17.                     highlight: “#5AD3D1”,
  18.                     label: “Tuesday”
  19.                 },
  20.                 {
  21.                     value: 150,
  22.                     color: “#FDB45C”,
  23.                     highlight: “#FFC870”,
  24.                     label: “Wednesday”
  25.                 },
  26.                 {
  27.                     value: 20,
  28.                     color: “#949FB1”,
  29.                     highlight: “#A8B3C5”,
  30.                     label: “Saturday”
  31.                 },
  32.                 {
  33.                     value: 400,
  34.                     color: “#4D5360”,
  35.                     highlight: “#616774”,
  36.                     label: “Sunday”
  37.                 }
  38.         ];
  39.         window.onload = function () {
  40.             var canvasObject = document.getElementById(“myChart”).getContext(“2d”);
  41.             window.myPolarArea = new Chart(canvasObject).PolarArea(polarChartData, {
  42.                 responsive: true
  43.             });
  44.         }
  45.     </script>
  46. </head>
  47. <body>
  48.     <div>
  49.         Polar Area Chart @ <a href=“www.sibeeshpassion.com”>Sibeesh Passion</a>
  50.         <canvas id=“myChart”></canvas>
  51.     </div>
  52. </body>
  53. </html>

Conclusion

I hope you can now create your own chart.

Output

Output

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