Geek Answers Handbook

Filling area between two lines - Chart.js v2

I am trying to fill the area between two lines in a line chart using Chart.js . Example:

There is already an answer here that explains how to expand the charts for this. But I know that this function is now native in V2 (from this thread on the github problems page ), the problem is that I just can not find the documentation related to this.

Is there a section in this document? Does anyone know how to use this feature?

Thank!

+4
source share
2 answers

, 2.6.0:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script>

, : http://www.chartjs.org/docs/latest/charts/area.html

:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>My two lines with colour between them</title>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js"></script>
   </head>
    <body>
        <canvas id="mychart" width="300" height="200"></canvas>
        <script>
            var ctx = document.getElementById('mychart').getContext('2d'); //get the context (canvas)

            var config = {              //configure the chart
                type: 'line',
                data: {
                    labels: [1, 2, 3, 4],
                    datasets: [{
                        label: "Min",
                        backgroundColor: 'rgba(55, 173, 221,  0.6)',
                        borderColor: 'rgba(55, 173, 221, 1.0)',
                        fill: false,  //no fill here
                        data: [5, 5, 3, 2]
                    },
                    {
                        label: "Max",
                        backgroundColor: 'rgba(55, 173, 221, 0.6)',
                        borderColor: 'rgba(55, 173, 221, 1.0)',
                        fill: '-1', //fill until previous dataset
                        data: [8, 7, 6, 5]
                    }]
                },
                options: {
                    maintainAspectRatio: false,
                    spanGaps: false,
                    elements: {
                        line: {
                            tension: 0.000001
                        }
                    },
                    plugins: {
                        filler: {
                            propagate: false
                        }
                    },
                    scales: {
                        xAxes: [{
                            ticks: {
                                autoSkip: false
                            }
                        }]
                    }
                }
            };
            var chart = new Chart(ctx, config);
        </script>
    </body>
</html>

Result

+3

More articles:


All Articles