[Solved]-ChartJS Line Charts - remove color underneath lines-Chart.js

Set fill: value false

let chart = new Chart('myChart', {

type: 'line',
    data: {
        labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
        datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3],
            fill: false, // <-- Here
        }]
    },
    options: {
        responsive: true,
        maintainAspectRatio: false,
        scales: {
            y: {
                beginAtZero: true
            }
        }
    }
});

<script src="https://cdn.jsdelivr.net/npm/chart.js@3.6.2/dist/chart.min.js"></script>
<canvas id="myChart" width="400" height="400"></canvas>

just tweak ts file to include ::

chartOptions = {
scales: { xAxes: [{}],  yAxes: [{}] },
elements: { line: { fill: false } }
};

html file looking as ::

<div style="display: block; width: 500px; height: 400px;">
<canvas
  baseChart
  [chartType]="'line'"
  [datasets]="chartData"
  [labels]="chartLabels"
  [colors]="lineChartColors"
  [options]="chartOptions"
  [legend]="true"
  (chartClick)="onChartClick($event)">
</canvas>
</div>

This will Work

I had the same issue, using angular-chart.js and got the desired result with:

$scope.override = {
    fill: false
};

and

<canvas class="chart chart-line" 
    chart-dataset-override="override"
    chart-data="data">
</canvas>

This worked for me:

$scope.color = [{
                  backgroundColor: 'transparent',
                  borderColor: '#F78511',
                },];

I solved this issue.

First step. html element inner add <- chart-colors="colors" like this :

<canvas id="line" class="chart chart-line" data="data" labels="labels" chart-colors="colors" legend="true" series="series" options="options" click="onClick"></canvas>

second step. $scope val colors Add like this :

$scope.colors = [{
        backgroundColor : '#0062ff',
        pointBackgroundColor: '#0062ff',
        pointHoverBackgroundColor: '#0062ff',
        borderColor: '#0062ff',
        pointBorderColor: '#0062ff',
        pointHoverBorderColor: '#0062ff',
        fill: false /* this option hide background-color */
    }, '#00ADF9', '#FDB45C', '#46BFBD'];

good luck!

Just set the fill option to be false in the datasets options:

data: {
   datasets: [{
      label: "",
      data: dataPoints,
      borderColor: color ,
      fill:false //this for not fill the color underneath the line
                                }]
                            },

Below solution was working when integrated chart js with Angular

$scope.options = {
                    scales: {
                      yAxes: [
                        {
                          id: 'y-axis-1',
                          type: 'linear',
                          display: true,
                          position: 'left'
                        }
                      ]
                    },
                    elements: {
                        line: {
                                fill: false
                        }
                    }
                };

<canvas id="" class="col-sm-12 chart chart-line" chart-data="data"
                            chart-options="options" chart-colors="colors">
</canvas>

Check this section on the Chart.js docs. Set the fill property to false within your dataset configuration:

var data = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [{
        label: "My First dataset",
        fill: false,
        data: [1, 2, 3]
    }]
};

Specify an array to the borderColor property if you want each line to have a different stroke color:

var myColors = ['red', 'green', 'blue']; // Define your colors

var data = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [{
        label: "My First dataset",
        fill: false,
        borderColor: myColors
        data: [1, 2, 3]
    }]
};