Charts advanced usage
Bootstrap 5 Charts advanced usage
This documentation provides examples of advanced chart usage.
Note: Read the API tab in the basic chart docs to find all available options and advanced customization
Options
In most cases, working with advanced charts is related to the handling of options.
MDB provides default options for each chart - you can easily change that by passing an object with your custom options to the Chart constructor.
<canvas id="chart-options-example"></canvas>
// Data
const dataChartOptionsExample = {
type: 'bar',
data: {
labels: ['January', 'February', 'March', 'April', 'May', 'June'],
datasets: [
{
label: 'Traffic',
data: [30, 15, 62, 65, 61, 6],
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
const optionsChartOptionsExample = {
options: {
scales: {
xAxes: [
{
ticks: {
fontColor: '#4285F4',
},
},
],
yAxes: [
{
ticks: {
fontColor: '#f44242',
},
},
],
},
},
};
new mdb.Chart(
document.getElementById('chart-options-example'),
dataChartOptionsExample,
optionsChartOptionsExample
);
Mixed
With MDB it is possible to create mixed charts that are a combination of two or more different chart types. A common example is a bar chart that also includes a line dataset.
<canvas id="chart-mixed-example"></canvas>
// Data
const dataMixedChartExample = {
type: 'bar',
data: {
labels: ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday '],
datasets: [
// First dataset (bar)
{
label: 'Impressions',
data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
order: 2,
},
// Second dataset (line)
{
label: 'Impressions (absolute top) %',
data: [211, 2543, 2745, 3123, 2765, 1485, 587],
type: 'line',
order: 1,
backgroundColor: 'rgba(66, 133, 244, 0.0)',
borderColor: '#94DFD7',
borderWidth: 2,
pointBorderColor: '#94DFD7',
pointBackgroundColor: '#94DFD7',
lineTension: 0.0,
},
],
},
};
new mdb.Chart(document.getElementById('chart-mixed-example'), dataMixedChartExample);
Data labels
Set dataLabelsPlugin option to true to display values directly
on a graph.
<canvas id="chart-data-mdb-labels-example"></canvas>
// Data
const dataChartDataLabelsExample = {
type: 'pie',
data: {
labels: ['January', 'February', 'March', 'April', 'May'],
datasets: [
{
label: 'Traffic',
data: [30, 45, 62, 65, 61],
backgroundColor: [
'rgba(63, 81, 181, 0.5)',
'rgba(77, 182, 172, 0.5)',
'rgba(66, 133, 244, 0.5)',
'rgba(156, 39, 176, 0.5)',
'rgba(233, 30, 99, 0.5)',
],
},
],
},
};
// Options
const optionsChartDataLabelsExample = {
dataLabelsPlugin: true,
options: {
plugins: {
datalabels: {
formatter: (value, ctx) => {
let sum = 0;
// Assign the data to the variable and format it according to your needs
let dataArr = dataChartDataLabelsExample.data.datasets[0].data;
dataArr.map((data) => {
sum += data;
});
let percentage = ((value * 100) / sum).toFixed(2) + '%';
return percentage;
},
color: 'white',
labels: {
title: {
font: {
size: '14',
},
},
},
},
},
},
};
new mdb.Chart(
document.getElementById('chart-data-mdb-labels-example'),
dataChartDataLabelsExample,
optionsChartDataLabelsExample
);
Double Y axis
In the example below we created chart with double Y axis with 2 datasets, each one with completely different data range.
Such a construction requires a scale adjustment, so the left axis is assigned and adjusted to the first dataset, and the right axis to the second dataset.
<canvas id="chart-double-y-axis-example"></canvas>
// Data
const dataChartDobuleYAxisExample = {
type: 'bar',
data: {
labels: ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday '],
datasets: [
{
label: 'Impressions',
yAxisID: 'y-axis-1',
data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
order: 2,
},
{
label: 'Impressions (absolute top) %',
yAxisID: 'y-axis-2',
data: [1.5, 2, 0.5, 3, 1.2, 4, 3.4],
type: 'line',
order: 1,
backgroundColor: 'rgba(66, 133, 244, 0.0)',
borderColor: '#94DFD7',
borderWidth: 2,
pointBorderColor: '#94DFD7',
pointBackgroundColor: '#94DFD7',
lineTension: 0.0,
},
],
},
};
// Options
const optionsChartDobuleYAxisExample = {
options: {
scales: {
yAxes: [
{
display: true,
position: 'left',
id: 'y-axis-1',
},
{
display: true,
position: 'right',
id: 'y-axis-2',
gridLines: {
drawOnChartArea: false,
},
ticks: {
beginAtZero: true,
},
},
],
},
},
};
new mdb.Chart(
document.getElementById('chart-double-y-axis-example'),
dataChartDobuleYAxisExample,
optionsChartDobuleYAxisExample
);
Funnel
Example of horizontal bar chart with custom options and labels formatting (calculating integers numbers into percentages).
This data visualization is often used to visualize the flow of the website traffic.
<canvas id="chart-funnel-example"></canvas>
// Data
const dataChartFunnelExample = {
type: 'horizontalBar',
data: {
labels: ['Product views', 'Checkout', 'Purchases'],
datasets: [
{
data: [2112, 343, 45],
barPercentage: 1.24,
},
],
},
};
// Options
const optionsChartFunnelExample = {
dataLabelsPlugin: true,
options: {
scales: {
xAxes: [
{
gridLines: {
offsetGridLines: true,
},
},
],
},
legend: {
display: false,
},
plugins: {
datalabels: {
formatter: (value, ctx) => {
let sum = 0;
let dataArr = dataChartFunnelExample.data.datasets[0].data;
dataArr.map((data) => {
sum += data;
});
let percentage = ((value * 100) / sum).toFixed(2) + '%';
return percentage;
},
color: '#4f4f4f',
labels: {
title: {
font: {
size: '13',
},
anchor: 'end',
align: 'right',
},
},
},
},
},
};
new mdb.Chart(
document.getElementById('chart-funnel-example'),
dataChartFunnelExample,
optionsChartFunnelExample
);
Formatting values on the Y axes
In the example below we simply add "$" before each value on the Y axis.
<canvas id="chart-values-formatting-example"></canvas>
// Data
const dataChartValuesFormattingExample = {
type: 'bar',
data: {
labels: ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday '],
datasets: [
{
label: 'Sales',
data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
},
],
},
};
// Options
const optionsChartValuesFormattingExample = {
options: {
scales: {
yAxes: [
{
ticks: {
callback: function (value, index, values) {
return '$' + value;
},
},
},
],
},
},
};
new mdb.Chart(
document.getElementById('chart-values-formatting-example'),
dataChartValuesFormattingExample,
optionsChartValuesFormattingExample
);
Formatting values in the tooltips
In the example below we simply add "$" before each value displayed in the tooltips.
Hover the line of the chart to see the tooltip.
<canvas id="chart-tooltips-formatting-example"></canvas>
// Data
const dataChartTooltipsFormattingExample = {
type: 'line',
data: {
labels: ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday '],
datasets: [
{
label: 'Sales',
data: [2112, 2343, 2545, 3423, 2365, 1985, 987],
},
],
},
};
// Options
const optionsChartTooltipsFormattingExample = {
options: {
tooltips: {
callbacks: {
label: function (tooltipItem, data) {
return '$ ' + tooltipItem.yLabel;
},
},
},
},
};
new mdb.Chart(
document.getElementById('chart-tooltips-formatting-example'),
dataChartTooltipsFormattingExample,
optionsChartTooltipsFormattingExample
);
Double datasets in a bar chart
Example of the double datasets in a bar chart.
<canvas id="chart-bar-double-datasets-example"></canvas>
// Data
const dataChartBarDoubleDatasetsExample = {
type: 'bar',
data: {
labels: ['Desktop', 'Mobile', 'Tablet'],
datasets: [
{
label: 'Users',
data: [510, 653, 255],
},
{
label: 'Page views',
data: [1251, 1553, 1355],
backgroundColor: '#94DFD7',
borderColor: '#94DFD7',
},
],
},
};
// Options
const optionsChartBarDoubleDatasetsExample = {
options: {
scales: {
yAxes: [
{
stacked: false,
ticks: {
beginAtZero: true,
},
},
],
xAxes: [
{
stacked: false,
},
],
},
},
};
new mdb.Chart(
document.getElementById('chart-bar-double-datasets-example'),
dataChartBarDoubleDatasetsExample,
optionsChartBarDoubleDatasetsExample
);
Async data
Example of the fetching data from the JSON file.
<canvas id="chart-async-data-example"></canvas>
const chart = document.getElementById('chart-async-data-example');
const chartInstance = new mdb.Chart(chart, { type: 'bar' });
fetch(
'https://api.covid19api.com/total/country/poland/status/confirmed?from=2020-10-01T00:00:00Z&to=2020-12-01T00:00:00Z'
)
.then((data) => data.json())
.then((data) => {
const dataset = data.map((obj) => obj['Cases']);
const labels = data.map((obj) => obj['Date'].substr(0, 10));
chartInstance.update({
labels,
datasets: [
{
color: '#FFCDD2',
data: dataset,
label: 'Number of cases',
pointRadius: 0,
borderColor: dataset.color,
},
],
});
});