Add an offset to a dataset in Chart js - Javascript Chart.js

Javascript examples for Chart.js:Chart Data

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Description

Add an offset to a dataset in Chart js

Demo Code

ResultView the demo in separate window 

<html>
   <head> 
      <meta name="viewport" content="width=device-width, initial-scale=1"> 
      <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.2/Chart.min.js"></script> 
      <script type="text/javascript">
    window.onload=function(){//from   w w  w  . jav a 2 s. co m
var ctx = document.getElementById("canvas");
Chart.pluginService.register({
    afterUpdate: function(chart) {
       var dataset = chart.config.data.datasets[0];
       var offset = 20;
        for (var i = 0; i < dataset._meta[0].data.length; i++) {
           var model = dataset._meta[0].data[i]._model;
            model.x += offset;
            model.controlPointNextX += offset;
            model.controlPointPreviousX += offset;
        }
    }
});
var myChart = new Chart.Line(ctx, {
    type: 'line',
    data: {
        labels: ["JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC", ""],
        datasets: [{
            data: [5, 10.5, 18.2, 33.9, 121.2, 184.9, 179.9, 196.1, 158.3, 166.3, 66.4, 20.6, null],
            pointLabelFontSize : 4,
            borderWidth: 2,
            fill: false,
            lineTension: .3,
            borderColor: "#f37029",
            borderCapStyle: 'round',
            borderDash: [],
            borderDashOffset: 0.0,
            borderJoinStyle: 'bevel',
            pointBorderColor: "#f37029",
            pointBackgroundColor: "#f37029",
            pointBorderWidth: 1,
            pointHoverRadius: 4,
            pointHoverBackgroundColor: "rgba(220,220,220,1)",
            pointHoverBorderColor: "rgba(220,220,220,1)",
            pointHoverBorderWidth: 2,
            pointRadius: 4,
            pointHitRadius: 10,
            spanGaps: false,
        }]
    },
    options: {
        scales: {
            xAxes: [{
                gridLines: {
                    offsetGridLines: true,
                    display: false,
                    borderDash: [6, 2],
                    tickMarkLength:5
                },
                ticks: {
                     fontSize: 8,
                     labelOffset: 10,
                     maxRotation: 0
                }}],
            yAxes: [{
                gridLines: {
                    display:false
                },
                ticks: {
                    beginAtZero: true,
                    max: 200,
                    min: 0,
                    stepSize: 20,
                    fontSize: 8
                }
            }]
        },
        legend: {
            display: false
        },
        responsive: false,
        maintainAspectRatio: true
    }
});
    }

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

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