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Axes are an integral part of any chart or graph. Like Cartesian axes, category axes are also an essential part of a chart.
The syntax of defining category axes globally is given below −
let chart = new Chart(ctx, {
type: ...
data: {
labels: [''January'', ''February'', ''March'', ''April'', ''May'', ''June''],
datasets: ...
}
});
We can define category axes as a part of axis as follows −
let chart = new Chart(ctx, {
type: ...
data: ...
options: {
scales: {
x: {
type: ''category'',
labels: [''January'', ''February'', ''March'', ''April'', ''May'', ''June'']
}
}
}
});
Example
Let’s take an example in which we will use category axes for creating a chart −
<!DOCTYPE>
<html>
<head>
<meta charset- "UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>chart.js</title>
</head>
<body>
<canvas id="chartId" aria-label="chart" height="300" width="580"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.1.1/chart.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.1.1/helpers.esm.min.js"></script>
<script>
var chrt = document.getElementById("chartId").getContext("2d");
var chartId = new Chart(chrt, {
type: ''bar'',
data: {
labels: ["HTML", "CSS", "JAVASCRIPT", "CHART.JS", "JQUERY", "BOOTSTRP"],
datasets: [{
label: "online tutorial subjects",
data: [20, 40, 30, 35, 30, 20],
backgroundColor: [''yellow'', ''aqua'', ''pink'', ''lightgreen'', ''lightblue'', ''gold''],
borderColor: [''black''],
borderWidth: 1,
pointRadius: 4,
}],
},
options: {
responsive: false,
scales: {
x: {
min: ''CSS'',
max: ''JQUERY''
}
}
},
});
</script>
</body>
</html>
Output
Advertisements
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