Background colour of line charts - Javascript Chart.js

Javascript examples for Chart.js:Line Chart

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  4. Line Chart

Description

Background colour of line charts

Demo Code

ResultView the demo in separate window 

<html>
   <head> 
      <title>chart.js 2.1</title> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.0/Chart.bundle.min.js"></script> 
      <script type="text/javascript">
    window.onload=function(){// ww  w .  ja  v a2  s.  c o  m
      Chart.pluginService.register({
         beforeDraw: function (chart, easing) {
            if (chart.config.options.chartArea && chart.config.options.chartArea.backgroundColor) {
               var helpers = Chart.helpers;
               var ctx = chart.chart.ctx;
               var chartArea = chart.chartArea;
               ctx.save();
               ctx.fillStyle = chart.config.options.chartArea.backgroundColor;
               ctx.fillRect(chartArea.left, chartArea.top, chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);
               ctx.restore();
            }
         }
      });
      var config = {
         type: 'line',
         data: {
            labels: ["January", "February", "March", "April", "May", "June", "July"],
            datasets: [{
               label: "My First dataset",
               data: [65, 0, 80, 81, 56, 85, 40],
               fill: false
            }]
         },
         options: {
            chartArea: {
               backgroundColor: 'rgba(251, 85, 85, 0.4)'
            }
         }
      };
      var ctx = document.getElementById("myChart").getContext("2d");
      new Chart(ctx, config);
    }

      </script> 
   </head> 
   <body> 
      <canvas id="myChart"></canvas>  
   </body>
</html>

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