How To Draw Radar Charts In Web?

Last Updated : 22 Apr, 2024

The Radar charts consist of a series of data points that are plotted on radial axes emanating from the central point. Each axis represents a different variable and data points that are connected to form a polygon providing the visual representation of the data distribution.

Approach: Using Chart.js library

Chart.js provides a straightforward way to create radar charts using its radar chart type. Let’s see how to create a radar chart using Chart.js.

Chart.js CDN link:

Include the below chart.js CDN link to your HTML document to use chart.js in your project.

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

Example: The below code implements the Chart.js library to create radar chart on the web app.

HTML

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content=
"width=device-width, initial-scale=1.0">
    <title>
        The Radar Chart
    </title>
    <script src=
"https://cdn.jsdelivr.net/npm/chart.js">
    </script>
</head>

<body>
    <canvas id="radarChart"></canvas>
    <script>
        let ctx = document.
            getElementById('radarChart').
            getContext('2d');
        let myChart = new Chart(ctx, {
            type: 'radar',
            data: {
                labels: 
                    ['A', 'B', 'C', 'D', 'E'],
                datasets: [{
                    label: 'Data Set 1',
                    data: [12, 19, 3, 5, 2],
                    backgroundColor: 
                        'rgba(255, 99, 132, 0.2)',
                    borderColor: 
                        'rgba(255, 99, 132, 1)',
                    borderWidth: 1
                }]
            },
            options: {
                scales: {
                    r: {
                        angleLines: {
                            display: false
                        },
                        suggestedMin: 0,
                        suggestedMax: 20
                    }
                }
            }
        });
    </script>
</body>

</html>

Output:

we1222

Example 2: The below code creates an advanced radar chart on the web page using chart.js.

HTML

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content=
"width=device-width, initial-scale=1.0">
    <title>
        The Radar Chart Example
    </title>
    <script src=
"https://cdn.jsdelivr.net/npm/chart.js">
    </script>
</head>

<body>
    <canvas id="radarChart" width="400" 
        height="400">
    </canvas>
    <script>
        const ctx = document.
            getElementById('radarChart').
                getContext('2d');
        const myRadarChart = new Chart(ctx, {
            type: 'radar',
            data: {
                labels: 
                    ['Category 1', 'Category 2', 'Category 3', 
                    'Category 4', 'Category 5'],
                datasets: [{
                    label: 'Dataset 1',
                    data: 
                        [10, 20, 15, 25, 30],
                    backgroundColor: 
                        'rgba(255, 99, 132, 0.2)',
                    borderColor: 
                        'rgba(255, 99, 132, 1)',
                    borderWidth: 1
                }, {
                    label: 'Dataset 2',
                    data: 
                        [15, 25, 20, 30, 35],
                    backgroundColor: 
                        'rgba(54, 162, 235, 0.2)',
                    borderColor: 
                        'rgba(54, 162, 235, 1)',
                    borderWidth: 1
                }]
            },
            options: {
                scale: {
                    ticks: {
                        beginAtZero: true
                    }
                }
            }
        });
    </script>
</body>

</html>