How to Create A Horizontal Bar Chart In Chart.js?

9 minutes read

To create a horizontal bar chart in Chart.js, you first need to include the Chart.js library in your HTML file. Then, you can create a canvas element where the chart will be displayed. Next, you need to initialize a new Chart object and specify the type of chart as 'horizontalBar'.


You also need to provide data for the chart in the form of an array of objects. Each object should have a 'label' and 'data' property, which will be used to label the bars and specify their values, respectively.


Finally, you can customize the appearance of the chart by setting various options such as colors, labels, and tooltips. Once you have configured the chart to your liking, you can render it by calling the 'update' method on the Chart object. This will display the horizontal bar chart on your webpage for viewers to see and interact with.

Best Javascript Books to Read in 2024

1
JavaScript: The Comprehensive Guide to Learning Professional JavaScript Programming (The Rheinwerk Computing)

Rating is 5 out of 5

JavaScript: The Comprehensive Guide to Learning Professional JavaScript Programming (The Rheinwerk Computing)

2
JavaScript: The Definitive Guide: Master the World's Most-Used Programming Language

Rating is 4.9 out of 5

JavaScript: The Definitive Guide: Master the World's Most-Used Programming Language

3
JavaScript from Beginner to Professional: Learn JavaScript quickly by building fun, interactive, and dynamic web apps, games, and pages

Rating is 4.8 out of 5

JavaScript from Beginner to Professional: Learn JavaScript quickly by building fun, interactive, and dynamic web apps, games, and pages

4
Web Design with HTML, CSS, JavaScript and jQuery Set

Rating is 4.7 out of 5

Web Design with HTML, CSS, JavaScript and jQuery Set

5
JavaScript Crash Course: A Hands-On, Project-Based Introduction to Programming

Rating is 4.6 out of 5

JavaScript Crash Course: A Hands-On, Project-Based Introduction to Programming

6
Learning JavaScript Design Patterns: A JavaScript and React Developer's Guide

Rating is 4.5 out of 5

Learning JavaScript Design Patterns: A JavaScript and React Developer's Guide

7
Eloquent JavaScript, 3rd Edition: A Modern Introduction to Programming

Rating is 4.4 out of 5

Eloquent JavaScript, 3rd Edition: A Modern Introduction to Programming

8
JavaScript and jQuery: Interactive Front-End Web Development

Rating is 4.3 out of 5

JavaScript and jQuery: Interactive Front-End Web Development


What is the legend feature in Chart.js bar charts?

The legend feature in Chart.js bar charts is a key that provides information about the datasets represented in the chart. It typically displays a colored box or line next to a label, indicating which dataset each color or line represents. The legend helps viewers understand the data being displayed and allows them to easily distinguish between different datasets in the chart.


How to make a stacked bar chart in Chart.js?

To create a stacked bar chart in Chart.js, you will need to use the 'bar' type chart and set the 'stacked' property to true in the dataset options. Here is an example code snippet to create a stacked bar chart:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
<!DOCTYPE html>
<html>
<head>
    <title>Stacked Bar Chart</title>
    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
</head>
<body>
    <canvas id="myChart"></canvas>

    <script>
        var ctx = document.getElementById('myChart').getContext('2d');
        var myChart = new Chart(ctx, {
            type: 'bar',
            data: {
                labels: ['January', 'February', 'March', 'April', 'May'],
                datasets: [
                    {
                        label: 'Dataset 1',
                        data: [10, 20, 30, 40, 50],
                        backgroundColor: 'rgba(255, 99, 132, 0.2)',
                        borderColor: 'rgba(255, 99, 132, 1)',
                        borderWidth: 1
                    },
                    {
                        label: 'Dataset 2',
                        data: [15, 25, 35, 45, 55],
                        backgroundColor: 'rgba(54, 162, 235, 0.2)',
                        borderColor: 'rgba(54, 162, 235, 1)',
                        borderWidth: 1
                    }
                ]
            },
            options: {
                scales: {
                    x: {
                        stacked: true,
                    },
                    y: {
                        stacked: true
                    }
                }
            }
        });
    </script>
</body>
</html>


In this example, we have created a simple stacked bar chart with two datasets. The 'stacked' property is set to true for both the x-axis and y-axis scales to create the stacked effect. You can customize the labels, data, and colors of the datasets according to your requirements.


How to update data in a bar chart using Chart.js?

To update data in a bar chart using Chart.js, you can follow these steps:

  1. Get a reference to the chart instance: First, you need to get a reference to the chart instance using the getElementById method or by storing the chart instance in a variable when creating the chart.
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
var ctx = document.getElementById('myChart').getContext('2d');
var myChart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
        datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3],
            backgroundColor: [
                'rgba(255, 99, 132, 0.2)',
                'rgba(54, 162, 235, 0.2)',
                'rgba(255, 206, 86, 0.2)',
                'rgba(75, 192, 192, 0.2)',
                'rgba(153, 102, 255, 0.2)',
                'rgba(255, 159, 64, 0.2)'
            ],
            borderColor: [
                'rgba(255, 99, 132, 1)',
                'rgba(54, 162, 235, 1)',
                'rgba(255, 206, 86, 1)',
                'rgba(75, 192, 192, 1)',
                'rgba(153, 102, 255, 1)',
                'rgba(255, 159, 64, 1)'
            ],
            borderWidth: 1
        }]
    },
    options: {
        scales: {
            y: {
                beginAtZero: true
            }
        }
    }
});


  1. Update the data: You can update the data in the datasets array of the chart instance and then call the update method on the chart to redraw it with the updated data.
1
2
3
4
5
// Update the data
myChart.data.datasets[0].data[2] = 10;

// Call the update method
myChart.update();


In this example, we are updating the third data point in the dataset to be 10 and then calling the update method on the chart instance to redraw the chart with the updated data.


By following these steps, you can easily update data in a bar chart using Chart.js.


What is the purpose of using datasets in a bar chart with Chart.js?

The purpose of using datasets in a bar chart with Chart.js is to organize and display the data in a clear and visually appealing way. Datasets allow users to input data points and corresponding labels that will be plotted on the chart. By using datasets, users can customize the appearance of each bar, such as color and hover effects, and add data labels to provide more context to the information being presented. Overall, datasets help in presenting data in a structured and understandable manner in a bar chart.

Twitter LinkedIn Telegram Whatsapp

Related Posts:

To create a stacked bar chart in Chart.js, you need to use the &#34;stacked&#34; property in the options object when defining your chart. This property tells Chart.js to stack the bars on top of each other instead of side by side. You can set this property to ...
To display the value after the bar using chart.js, you can enable the &#39;afterDatasetsDraw&#39; hook in the options object of your chart configuration. Within this hook, you can loop through the datasets and use the canvas&#39; context to draw the values nex...
To display a bar chart in Chart.js, you first need to include the Chart.js library in your HTML file. Then, you can create a canvas element and specify its dimensions for the chart to be displayed. Next, you need to create a JavaScript function to initialize t...