I’m trying to use Chart.js 3.3.2 to display some a line graph with an equally spaced x date axis. Like the example they give here.
I cannot get a simple version of this example working (see below snippet) as it outputs the error:
Error: This method is not implemented: Check that a complete date adapter is provided.
I did not try to implement the whole example given it depends on externally defined functions and values.
I asked a similar question long ago (Chart.js creating a line graph using dates) but having re-read through answers there, it has not helped me here (notably most answers here also focus on Chart.js 2 rather than 3).
I would greatly appreciate any help here (I find the documentation here hard to understand).
const data = {
labels: [
new Date(86400000), // Day 1
new Date(2*86400000), // Day 2
new Date(3*86400000), // Day 3
new Date(4*86400000), // Day 4
new Date(6*86400000), // Day 6
new Date(7*86400000), // Day 7
new Date(13*86400000) // Day 13
],
datasets: [{
label: 'My First dataset',
data: [1,3,4,5,6,7,8]
}]
};
const config = {
type: 'line',
data: data,
options: {
scales: {
x: {
type: 'time'
}
}
}
};
let ctx = document.querySelector("canvas").getContext("2d");
let chart = new Chart(ctx,config);<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>repl.it</title>
<link href="style.css" rel="stylesheet" type="text/css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.3.2/chart.min.js"></script>
</head>
<body>
<canvas></canvas>
<script src="script.js"></script>
</body>
</html>Advertisement
Answer
you need to add a date adapter as provided in the 3.x migration guide
(search in the page for “available adapters”)
https://www.chartjs.org/docs/latest/getting-started/v3-migration.html
here is a working example
const data = {
labels: [
new Date(86400000), // Day 1
new Date(2 * 86400000), // Day 2
new Date(3 * 86400000), // Day 3
new Date(4 * 86400000), // Day 4
new Date(6 * 86400000), // Day 6
new Date(7 * 86400000), // Day 7
new Date(13 * 86400000), // Day 13
],
datasets: [
{
label: "My First dataset",
data: [1, 3, 4, 5, 6, 7, 8],
},
],
};
let ctx = document.querySelector("canvas").getContext("2d");
let chart = new Chart(ctx, {
type: "line",
data: data,
options: {
scales: {
x: {
type: "time",
}
},
},
});<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script src="https://cdn.jsdelivr.net/npm/moment@2.27.0"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-adapter-moment@0.1.1"></script>
<title>repl.it</title>
</head>
<body>
<canvas></canvas>
<script src="new.ts"></script>
</body>
</html>